tools/vm/slabinfo.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Slabinfo: Tool to get reports about slabs
   4  *
   5  * (C) 2007 sgi, Christoph Lameter
   6  * (C) 2011 Linux Foundation, Christoph Lameter
   7  *
   8  * Compile with:
   9  *
  10  * gcc -o slabinfo slabinfo.c
  11  */
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <sys/types.h>
  15 #include <dirent.h>
  16 #include <strings.h>
  17 #include <string.h>
  18 #include <unistd.h>
  19 #include <stdarg.h>
  20 #include <getopt.h>
  21 #include <regex.h>
  22 #include <errno.h>
  23
  24 #define MAX_SLABS 500
  25 #define MAX_ALIASES 500
  26 #define MAX_NODES 1024
  27
  28 struct slabinfo {
  29         char *name;
  30         int alias;
  31         int refs;
  32         int aliases, align, cache_dma, cpu_slabs, destroy_by_rcu;
  33         unsigned int hwcache_align, object_size, objs_per_slab;
  34         unsigned int sanity_checks, slab_size, store_user, trace;
  35         int order, poison, reclaim_account, red_zone;
  36         unsigned long partial, objects, slabs, objects_partial, objects_total;
  37         unsigned long alloc_fastpath, alloc_slowpath;
  38         unsigned long free_fastpath, free_slowpath;
  39         unsigned long free_frozen, free_add_partial, free_remove_partial;
  40         unsigned long alloc_from_partial, alloc_slab, free_slab, alloc_refill;
  41         unsigned long cpuslab_flush, deactivate_full, deactivate_empty;
  42         unsigned long deactivate_to_head, deactivate_to_tail;
  43         unsigned long deactivate_remote_frees, order_fallback;
  44         unsigned long cmpxchg_double_cpu_fail, cmpxchg_double_fail;
  45         unsigned long alloc_node_mismatch, deactivate_bypass;
  46         unsigned long cpu_partial_alloc, cpu_partial_free;
  47         int numa[MAX_NODES];
  48         int numa_partial[MAX_NODES];
  49 } slabinfo[MAX_SLABS];
  50
  51 struct aliasinfo {
  52         char *name;
  53         char *ref;
  54         struct slabinfo *slab;
  55 } aliasinfo[MAX_ALIASES];
  56
  57 int slabs;
  58 int actual_slabs;
  59 int aliases;
  60 int alias_targets;
  61 int highest_node;
  62
  63 char buffer[4096];
  64
  65 int show_empty;
  66 int show_report;
  67 int show_alias;
  68 int show_slab;
  69 int skip_zero = 1;
  70 int show_numa;
  71 int show_track;
  72 int show_first_alias;
  73 int validate;
  74 int shrink;
  75 int show_inverted;
  76 int show_single_ref;
  77 int show_totals;
  78 int sort_size;
  79 int sort_active;
  80 int set_debug;
  81 int show_ops;
  82 int show_activity;
  83 int output_lines = -1;
  84 int sort_loss;
  85 int extended_totals;
  86 int show_bytes;
  87 int unreclaim_only;
  88
  89 /* Debug options */
  90 int sanity;
  91 int redzone;
  92 int poison;
  93 int tracking;
  94 int tracing;
  95
  96 int page_size;
  97
  98 regex_t pattern;
  99
 100 static void fatal(const char *x, ...)
 101 {
 102         va_list ap;
 103
 104         va_start(ap, x);
 105         vfprintf(stderr, x, ap);
 106         va_end(ap);
 107         exit(EXIT_FAILURE);
 108 }
 109
 110 static void usage(void)
 111 {
 112         printf("slabinfo 4/15/2011. (c) 2007 sgi/(c) 2011 Linux Foundation.\n\n"
 113                 "slabinfo [-aADefhilnosrStTvz1LXBU] [N=K] [-dafzput] [slab-regexp]\n"
 114                 "-a|--aliases           Show aliases\n"
 115                 "-A|--activity          Most active slabs first\n"
 116                 "-B|--Bytes             Show size in bytes\n"
 117                 "-D|--display-active    Switch line format to activity\n"
 118                 "-e|--empty             Show empty slabs\n"
 119                 "-f|--first-alias       Show first alias\n"
 120                 "-h|--help              Show usage information\n"
 121                 "-i|--inverted          Inverted list\n"
 122                 "-l|--slabs             Show slabs\n"
 123                 "-L|--Loss              Sort by loss\n"
 124                 "-n|--numa              Show NUMA information\n"
 125                 "-N|--lines=K           Show the first K slabs\n"
 126                 "-o|--ops               Show kmem_cache_ops\n"
 127                 "-r|--report            Detailed report on single slabs\n"
 128                 "-s|--shrink            Shrink slabs\n"
 129                 "-S|--Size              Sort by size\n"
 130                 "-t|--tracking          Show alloc/free information\n"
 131                 "-T|--Totals            Show summary information\n"
 132                 "-U|--Unreclaim         Show unreclaimable slabs only\n"
 133                 "-v|--validate          Validate slabs\n"
 134                 "-z|--zero              Include empty slabs\n"
 135                 "-1|--1ref              Single reference\n"
 136                 "-X|--Xtotals           Show extended summary information\n"
 137
 138                 "\n"
 139                 "-d  | --debug          Switch off all debug options\n"
 140                 "-da | --debug=a        Switch on all debug options (--debug=FZPU)\n"
 141
 142                 "\n"
 143                 "-d[afzput] | --debug=[afzput]\n"
 144                 "    f | F              Sanity Checks (SLAB_CONSISTENCY_CHECKS)\n"
 145                 "    z | Z              Redzoning\n"
 146                 "    p | P              Poisoning\n"
 147                 "    u | U              Tracking\n"
 148                 "    t | T              Tracing\n"
 149         );
 150 }
 151
 152 static unsigned long read_obj(const char *name)
 153 {
 154         FILE *f = fopen(name, "r");
 155
 156         if (!f)
 157                 buffer[0] = 0;
 158         else {
 159                 if (!fgets(buffer, sizeof(buffer), f))
 160                         buffer[0] = 0;
 161                 fclose(f);
 162                 if (buffer[strlen(buffer)] == '\n')
 163                         buffer[strlen(buffer)] = 0;
 164         }
 165         return strlen(buffer);
 166 }
 167
 168
 169 /*
 170  * Get the contents of an attribute
 171  */
 172 static unsigned long get_obj(const char *name)
 173 {
 174         if (!read_obj(name))
 175                 return 0;
 176
 177         return atol(buffer);
 178 }
 179
 180 static unsigned long get_obj_and_str(const char *name, char **x)
 181 {
 182         unsigned long result = 0;
 183         char *p;
 184
 185         *x = NULL;
 186
 187         if (!read_obj(name)) {
 188                 x = NULL;
 189                 return 0;
 190         }
 191         result = strtoul(buffer, &p, 10);
 192         while (*p == ' ')
 193                 p++;
 194         if (*p)
 195                 *x = strdup(p);
 196         return result;
 197 }
 198
 199 static void set_obj(struct slabinfo *s, const char *name, int n)
 200 {
 201         char x[100];
 202         FILE *f;
 203
 204         snprintf(x, 100, "%s/%s", s->name, name);
 205         f = fopen(x, "w");
 206         if (!f)
 207                 fatal("Cannot write to %s\n", x);
 208
 209         fprintf(f, "%d\n", n);
 210         fclose(f);
 211 }
 212
 213 static unsigned long read_slab_obj(struct slabinfo *s, const char *name)
 214 {
 215         char x[100];
 216         FILE *f;
 217         size_t l;
 218
 219         snprintf(x, 100, "%s/%s", s->name, name);
 220         f = fopen(x, "r");
 221         if (!f) {
 222                 buffer[0] = 0;
 223                 l = 0;
 224         } else {
 225                 l = fread(buffer, 1, sizeof(buffer), f);
 226                 buffer[l] = 0;
 227                 fclose(f);
 228         }
 229         return l;
 230 }
 231
 232
 233 /*
 234  * Put a size string together
 235  */
 236 static int store_size(char *buffer, unsigned long value)
 237 {
 238         unsigned long divisor = 1;
 239         char trailer = 0;
 240         int n;
 241
 242         if (!show_bytes) {
 243                 if (value > 1000000000UL) {
 244                         divisor = 100000000UL;
 245                         trailer = 'G';
 246                 } else if (value > 1000000UL) {
 247                         divisor = 100000UL;
 248                         trailer = 'M';
 249                 } else if (value > 1000UL) {
 250                         divisor = 100;
 251                         trailer = 'K';
 252                 }
 253         }
 254
 255         value /= divisor;
 256         n = sprintf(buffer, "%ld",value);
 257         if (trailer) {
 258                 buffer[n] = trailer;
 259                 n++;
 260                 buffer[n] = 0;
 261         }
 262         if (divisor != 1) {
 263                 memmove(buffer + n - 2, buffer + n - 3, 4);
 264                 buffer[n-2] = '.';
 265                 n++;
 266         }
 267         return n;
 268 }
 269
 270 static void decode_numa_list(int *numa, char *t)
 271 {
 272         int node;
 273         int nr;
 274
 275         memset(numa, 0, MAX_NODES * sizeof(int));
 276
 277         if (!t)
 278                 return;
 279
 280         while (*t == 'N') {
 281                 t++;
 282                 node = strtoul(t, &t, 10);
 283                 if (*t == '=') {
 284                         t++;
 285                         nr = strtoul(t, &t, 10);
 286                         numa[node] = nr;
 287                         if (node > highest_node)
 288                                 highest_node = node;
 289                 }
 290                 while (*t == ' ')
 291                         t++;
 292         }
 293 }
 294
 295 static void slab_validate(struct slabinfo *s)
 296 {
 297         if (strcmp(s->name, "*") == 0)
 298                 return;
 299
 300         set_obj(s, "validate", 1);
 301 }
 302
 303 static void slab_shrink(struct slabinfo *s)
 304 {
 305         if (strcmp(s->name, "*") == 0)
 306                 return;
 307
 308         set_obj(s, "shrink", 1);
 309 }
 310
 311 int line = 0;
 312
 313 static void first_line(void)
 314 {
 315         if (show_activity)
 316                 printf("Name                   Objects      Alloc       Free"
 317                         "   %%Fast Fallb O CmpX   UL\n");
 318         else
 319                 printf("Name                   Objects Objsize           %s "
 320                         "Slabs/Part/Cpu  O/S O %%Fr %%Ef Flg\n",
 321                         sort_loss ? " Loss" : "Space");
 322 }
 323
 324 /*
 325  * Find the shortest alias of a slab
 326  */
 327 static struct aliasinfo *find_one_alias(struct slabinfo *find)
 328 {
 329         struct aliasinfo *a;
 330         struct aliasinfo *best = NULL;
 331
 332         for(a = aliasinfo;a < aliasinfo + aliases; a++) {
 333                 if (a->slab == find &&
 334                         (!best || strlen(best->name) < strlen(a->name))) {
 335                                 best = a;
 336                                 if (strncmp(a->name,"kmall", 5) == 0)
 337                                         return best;
 338                         }
 339         }
 340         return best;
 341 }
 342
 343 static unsigned long slab_size(struct slabinfo *s)
 344 {
 345         return  s->slabs * (page_size << s->order);
 346 }
 347
 348 static unsigned long slab_activity(struct slabinfo *s)
 349 {
 350         return  s->alloc_fastpath + s->free_fastpath +
 351                 s->alloc_slowpath + s->free_slowpath;
 352 }
 353
 354 static unsigned long slab_waste(struct slabinfo *s)
 355 {
 356         return  slab_size(s) - s->objects * s->object_size;
 357 }
 358
 359 static void slab_numa(struct slabinfo *s, int mode)
 360 {
 361         int node;
 362
 363         if (strcmp(s->name, "*") == 0)
 364                 return;
 365
 366         if (!highest_node) {
 367                 printf("\n%s: No NUMA information available.\n", s->name);
 368                 return;
 369         }
 370
 371         if (skip_zero && !s->slabs)
 372                 return;
 373
 374         if (!line) {
 375                 printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
 376                 for(node = 0; node <= highest_node; node++)
 377                         printf(" %4d", node);
 378                 printf("\n----------------------");
 379                 for(node = 0; node <= highest_node; node++)
 380                         printf("-----");
 381                 printf("\n");
 382         }
 383         printf("%-21s ", mode ? "All slabs" : s->name);
 384         for(node = 0; node <= highest_node; node++) {
 385                 char b[20];
 386
 387                 store_size(b, s->numa[node]);
 388                 printf(" %4s", b);
 389         }
 390         printf("\n");
 391         if (mode) {
 392                 printf("%-21s ", "Partial slabs");
 393                 for(node = 0; node <= highest_node; node++) {
 394                         char b[20];
 395
 396                         store_size(b, s->numa_partial[node]);
 397                         printf(" %4s", b);
 398                 }
 399                 printf("\n");
 400         }
 401         line++;
 402 }
 403
 404 static void show_tracking(struct slabinfo *s)
 405 {
 406         printf("\n%s: Kernel object allocation\n", s->name);
 407         printf("-----------------------------------------------------------------------\n");
 408         if (read_slab_obj(s, "alloc_calls"))
 409                 printf("%s", buffer);
 410         else
 411                 printf("No Data\n");
 412
 413         printf("\n%s: Kernel object freeing\n", s->name);
 414         printf("------------------------------------------------------------------------\n");
 415         if (read_slab_obj(s, "free_calls"))
 416                 printf("%s", buffer);
 417         else
 418                 printf("No Data\n");
 419
 420 }
 421
 422 static void ops(struct slabinfo *s)
 423 {
 424         if (strcmp(s->name, "*") == 0)
 425                 return;
 426
 427         if (read_slab_obj(s, "ops")) {
 428                 printf("\n%s: kmem_cache operations\n", s->name);
 429                 printf("--------------------------------------------\n");
 430                 printf("%s", buffer);
 431         } else
 432                 printf("\n%s has no kmem_cache operations\n", s->name);
 433 }
 434
 435 static const char *onoff(int x)
 436 {
 437         if (x)
 438                 return "On ";
 439         return "Off";
 440 }
 441
 442 static void slab_stats(struct slabinfo *s)
 443 {
 444         unsigned long total_alloc;
 445         unsigned long total_free;
 446         unsigned long total;
 447
 448         if (!s->alloc_slab)
 449                 return;
 450
 451         total_alloc = s->alloc_fastpath + s->alloc_slowpath;
 452         total_free = s->free_fastpath + s->free_slowpath;
 453
 454         if (!total_alloc)
 455                 return;
 456
 457         printf("\n");
 458         printf("Slab Perf Counter       Alloc     Free %%Al %%Fr\n");
 459         printf("--------------------------------------------------\n");
 460         printf("Fastpath             %8lu %8lu %3lu %3lu\n",
 461                 s->alloc_fastpath, s->free_fastpath,
 462                 s->alloc_fastpath * 100 / total_alloc,
 463                 total_free ? s->free_fastpath * 100 / total_free : 0);
 464         printf("Slowpath             %8lu %8lu %3lu %3lu\n",
 465                 total_alloc - s->alloc_fastpath, s->free_slowpath,
 466                 (total_alloc - s->alloc_fastpath) * 100 / total_alloc,
 467                 total_free ? s->free_slowpath * 100 / total_free : 0);
 468         printf("Page Alloc           %8lu %8lu %3lu %3lu\n",
 469                 s->alloc_slab, s->free_slab,
 470                 s->alloc_slab * 100 / total_alloc,
 471                 total_free ? s->free_slab * 100 / total_free : 0);
 472         printf("Add partial          %8lu %8lu %3lu %3lu\n",
 473                 s->deactivate_to_head + s->deactivate_to_tail,
 474                 s->free_add_partial,
 475                 (s->deactivate_to_head + s->deactivate_to_tail) * 100 / total_alloc,
 476                 total_free ? s->free_add_partial * 100 / total_free : 0);
 477         printf("Remove partial       %8lu %8lu %3lu %3lu\n",
 478                 s->alloc_from_partial, s->free_remove_partial,
 479                 s->alloc_from_partial * 100 / total_alloc,
 480                 total_free ? s->free_remove_partial * 100 / total_free : 0);
 481
 482         printf("Cpu partial list     %8lu %8lu %3lu %3lu\n",
 483                 s->cpu_partial_alloc, s->cpu_partial_free,
 484                 s->cpu_partial_alloc * 100 / total_alloc,
 485                 total_free ? s->cpu_partial_free * 100 / total_free : 0);
 486
 487         printf("RemoteObj/SlabFrozen %8lu %8lu %3lu %3lu\n",
 488                 s->deactivate_remote_frees, s->free_frozen,
 489                 s->deactivate_remote_frees * 100 / total_alloc,
 490                 total_free ? s->free_frozen * 100 / total_free : 0);
 491
 492         printf("Total                %8lu %8lu\n\n", total_alloc, total_free);
 493
 494         if (s->cpuslab_flush)
 495                 printf("Flushes %8lu\n", s->cpuslab_flush);
 496
 497         total = s->deactivate_full + s->deactivate_empty +
 498                         s->deactivate_to_head + s->deactivate_to_tail + s->deactivate_bypass;
 499
 500         if (total) {
 501                 printf("\nSlab Deactivation             Occurrences %%\n");
 502                 printf("-------------------------------------------------\n");
 503                 printf("Slab full                     %7lu  %3lu%%\n",
 504                         s->deactivate_full, (s->deactivate_full * 100) / total);
 505                 printf("Slab empty                    %7lu  %3lu%%\n",
 506                         s->deactivate_empty, (s->deactivate_empty * 100) / total);
 507                 printf("Moved to head of partial list %7lu  %3lu%%\n",
 508                         s->deactivate_to_head, (s->deactivate_to_head * 100) / total);
 509                 printf("Moved to tail of partial list %7lu  %3lu%%\n",
 510                         s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total);
 511                 printf("Deactivation bypass           %7lu  %3lu%%\n",
 512                         s->deactivate_bypass, (s->deactivate_bypass * 100) / total);
 513                 printf("Refilled from foreign frees   %7lu  %3lu%%\n",
 514                         s->alloc_refill, (s->alloc_refill * 100) / total);
 515                 printf("Node mismatch                 %7lu  %3lu%%\n",
 516                         s->alloc_node_mismatch, (s->alloc_node_mismatch * 100) / total);
 517         }
 518
 519         if (s->cmpxchg_double_fail || s->cmpxchg_double_cpu_fail) {
 520                 printf("\nCmpxchg_double Looping\n------------------------\n");
 521                 printf("Locked Cmpxchg Double redos   %lu\nUnlocked Cmpxchg Double redos %lu\n",
 522                         s->cmpxchg_double_fail, s->cmpxchg_double_cpu_fail);
 523         }
 524 }
 525
 526 static void report(struct slabinfo *s)
 527 {
 528         if (strcmp(s->name, "*") == 0)
 529                 return;
 530
 531         printf("\nSlabcache: %-15s  Aliases: %2d Order : %2d Objects: %lu\n",
 532                 s->name, s->aliases, s->order, s->objects);
 533         if (s->hwcache_align)
 534                 printf("** Hardware cacheline aligned\n");
 535         if (s->cache_dma)
 536                 printf("** Memory is allocated in a special DMA zone\n");
 537         if (s->destroy_by_rcu)
 538                 printf("** Slabs are destroyed via RCU\n");
 539         if (s->reclaim_account)
 540                 printf("** Reclaim accounting active\n");
 541
 542         printf("\nSizes (bytes)     Slabs              Debug                Memory\n");
 543         printf("------------------------------------------------------------------------\n");
 544         printf("Object : %7d  Total  : %7ld   Sanity Checks : %s  Total: %7ld\n",
 545                         s->object_size, s->slabs, onoff(s->sanity_checks),
 546                         s->slabs * (page_size << s->order));
 547         printf("SlabObj: %7d  Full   : %7ld   Redzoning     : %s  Used : %7ld\n",
 548                         s->slab_size, s->slabs - s->partial - s->cpu_slabs,
 549                         onoff(s->red_zone), s->objects * s->object_size);
 550         printf("SlabSiz: %7d  Partial: %7ld   Poisoning     : %s  Loss : %7ld\n",
 551                         page_size << s->order, s->partial, onoff(s->poison),
 552                         s->slabs * (page_size << s->order) - s->objects * s->object_size);
 553         printf("Loss   : %7d  CpuSlab: %7d   Tracking      : %s  Lalig: %7ld\n",
 554                         s->slab_size - s->object_size, s->cpu_slabs, onoff(s->store_user),
 555                         (s->slab_size - s->object_size) * s->objects);
 556         printf("Align  : %7d  Objects: %7d   Tracing       : %s  Lpadd: %7ld\n",
 557                         s->align, s->objs_per_slab, onoff(s->trace),
 558                         ((page_size << s->order) - s->objs_per_slab * s->slab_size) *
 559                         s->slabs);
 560
 561         ops(s);
 562         show_tracking(s);
 563         slab_numa(s, 1);
 564         slab_stats(s);
 565 }
 566
 567 static void slabcache(struct slabinfo *s)
 568 {
 569         char size_str[20];
 570         char dist_str[40];
 571         char flags[20];
 572         char *p = flags;
 573
 574         if (strcmp(s->name, "*") == 0)
 575                 return;
 576
 577         if (unreclaim_only && s->reclaim_account)
 578                 return;
 579
 580         if (actual_slabs == 1) {
 581                 report(s);
 582                 return;
 583         }
 584
 585         if (skip_zero && !show_empty && !s->slabs)
 586                 return;
 587
 588         if (show_empty && s->slabs)
 589                 return;
 590
 591         if (sort_loss == 0)
 592                 store_size(size_str, slab_size(s));
 593         else
 594                 store_size(size_str, slab_waste(s));
 595         snprintf(dist_str, 40, "%lu/%lu/%d", s->slabs - s->cpu_slabs,
 596                                                 s->partial, s->cpu_slabs);
 597
 598         if (!line++)
 599                 first_line();
 600
 601         if (s->aliases)
 602                 *p++ = '*';
 603         if (s->cache_dma)
 604                 *p++ = 'd';
 605         if (s->hwcache_align)
 606                 *p++ = 'A';
 607         if (s->poison)
 608                 *p++ = 'P';
 609         if (s->reclaim_account)
 610                 *p++ = 'a';
 611         if (s->red_zone)
 612                 *p++ = 'Z';
 613         if (s->sanity_checks)
 614                 *p++ = 'F';
 615         if (s->store_user)
 616                 *p++ = 'U';
 617         if (s->trace)
 618                 *p++ = 'T';
 619
 620         *p = 0;
 621         if (show_activity) {
 622                 unsigned long total_alloc;
 623                 unsigned long total_free;
 624
 625                 total_alloc = s->alloc_fastpath + s->alloc_slowpath;
 626                 total_free = s->free_fastpath + s->free_slowpath;
 627
 628                 printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d %4ld %4ld\n",
 629                         s->name, s->objects,
 630                         total_alloc, total_free,
 631                         total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,
 632                         total_free ? (s->free_fastpath * 100 / total_free) : 0,
 633                         s->order_fallback, s->order, s->cmpxchg_double_fail,
 634                         s->cmpxchg_double_cpu_fail);
 635         } else {
 636                 printf("%-21s %8ld %7d %15s %14s %4d %1d %3ld %3ld %s\n",
 637                         s->name, s->objects, s->object_size, size_str, dist_str,
 638                         s->objs_per_slab, s->order,
 639                         s->slabs ? (s->partial * 100) / s->slabs : 100,
 640                         s->slabs ? (s->objects * s->object_size * 100) /
 641                                 (s->slabs * (page_size << s->order)) : 100,
 642                         flags);
 643         }
 644 }
 645
 646 /*
 647  * Analyze debug options. Return false if something is amiss.
 648  */
 649 static int debug_opt_scan(char *opt)
 650 {
 651         if (!opt || !opt[0] || strcmp(opt, "-") == 0)
 652                 return 1;
 653
 654         if (strcasecmp(opt, "a") == 0) {
 655                 sanity = 1;
 656                 poison = 1;
 657                 redzone = 1;
 658                 tracking = 1;
 659                 return 1;
 660         }
 661
 662         for ( ; *opt; opt++)
 663                 switch (*opt) {
 664                 case 'F' : case 'f':
 665                         if (sanity)
 666                                 return 0;
 667                         sanity = 1;
 668                         break;
 669                 case 'P' : case 'p':
 670                         if (poison)
 671                                 return 0;
 672                         poison = 1;
 673                         break;
 674
 675                 case 'Z' : case 'z':
 676                         if (redzone)
 677                                 return 0;
 678                         redzone = 1;
 679                         break;
 680
 681                 case 'U' : case 'u':
 682                         if (tracking)
 683                                 return 0;
 684                         tracking = 1;
 685                         break;
 686
 687                 case 'T' : case 't':
 688                         if (tracing)
 689                                 return 0;
 690                         tracing = 1;
 691                         break;
 692                 default:
 693                         return 0;
 694                 }
 695         return 1;
 696 }
 697
 698 static int slab_empty(struct slabinfo *s)
 699 {
 700         if (s->objects > 0)
 701                 return 0;
 702
 703         /*
 704          * We may still have slabs even if there are no objects. Shrinking will
 705          * remove them.
 706          */
 707         if (s->slabs != 0)
 708                 set_obj(s, "shrink", 1);
 709
 710         return 1;
 711 }
 712
 713 static void slab_debug(struct slabinfo *s)
 714 {
 715         if (strcmp(s->name, "*") == 0)
 716                 return;
 717
 718         if (sanity && !s->sanity_checks) {
 719                 set_obj(s, "sanity", 1);
 720         }
 721         if (!sanity && s->sanity_checks) {
 722                 if (slab_empty(s))
 723                         set_obj(s, "sanity", 0);
 724                 else
 725                         fprintf(stderr, "%s not empty cannot disable sanity checks\n", s->name);
 726         }
 727         if (redzone && !s->red_zone) {
 728                 if (slab_empty(s))
 729                         set_obj(s, "red_zone", 1);
 730                 else
 731                         fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
 732         }
 733         if (!redzone && s->red_zone) {
 734                 if (slab_empty(s))
 735                         set_obj(s, "red_zone", 0);
 736                 else
 737                         fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
 738         }
 739         if (poison && !s->poison) {
 740                 if (slab_empty(s))
 741                         set_obj(s, "poison", 1);
 742                 else
 743                         fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
 744         }
 745         if (!poison && s->poison) {
 746                 if (slab_empty(s))
 747                         set_obj(s, "poison", 0);
 748                 else
 749                         fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
 750         }
 751         if (tracking && !s->store_user) {
 752                 if (slab_empty(s))
 753                         set_obj(s, "store_user", 1);
 754                 else
 755                         fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
 756         }
 757         if (!tracking && s->store_user) {
 758                 if (slab_empty(s))
 759                         set_obj(s, "store_user", 0);
 760                 else
 761                         fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
 762         }
 763         if (tracing && !s->trace) {
 764                 if (slabs == 1)
 765                         set_obj(s, "trace", 1);
 766                 else
 767                         fprintf(stderr, "%s can only enable trace for one slab at a time\n", s->name);
 768         }
 769         if (!tracing && s->trace)
 770                 set_obj(s, "trace", 1);
 771 }
 772
 773 static void totals(void)
 774 {
 775         struct slabinfo *s;
 776
 777         int used_slabs = 0;
 778         char b1[20], b2[20], b3[20], b4[20];
 779         unsigned long long max = 1ULL << 63;
 780
 781         /* Object size */
 782         unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
 783
 784         /* Number of partial slabs in a slabcache */
 785         unsigned long long min_partial = max, max_partial = 0,
 786                                 avg_partial, total_partial = 0;
 787
 788         /* Number of slabs in a slab cache */
 789         unsigned long long min_slabs = max, max_slabs = 0,
 790                                 avg_slabs, total_slabs = 0;
 791
 792         /* Size of the whole slab */
 793         unsigned long long min_size = max, max_size = 0,
 794                                 avg_size, total_size = 0;
 795
 796         /* Bytes used for object storage in a slab */
 797         unsigned long long min_used = max, max_used = 0,
 798                                 avg_used, total_used = 0;
 799
 800         /* Waste: Bytes used for alignment and padding */
 801         unsigned long long min_waste = max, max_waste = 0,
 802                                 avg_waste, total_waste = 0;
 803         /* Number of objects in a slab */
 804         unsigned long long min_objects = max, max_objects = 0,
 805                                 avg_objects, total_objects = 0;
 806         /* Waste per object */
 807         unsigned long long min_objwaste = max,
 808                                 max_objwaste = 0, avg_objwaste,
 809                                 total_objwaste = 0;
 810
 811         /* Memory per object */
 812         unsigned long long min_memobj = max,
 813                                 max_memobj = 0, avg_memobj,
 814                                 total_objsize = 0;
 815
 816         /* Percentage of partial slabs per slab */
 817         unsigned long min_ppart = 100, max_ppart = 0,
 818                                 avg_ppart, total_ppart = 0;
 819
 820         /* Number of objects in partial slabs */
 821         unsigned long min_partobj = max, max_partobj = 0,
 822                                 avg_partobj, total_partobj = 0;
 823
 824         /* Percentage of partial objects of all objects in a slab */
 825         unsigned long min_ppartobj = 100, max_ppartobj = 0,
 826                                 avg_ppartobj, total_ppartobj = 0;
 827
 828
 829         for (s = slabinfo; s < slabinfo + slabs; s++) {
 830                 unsigned long long size;
 831                 unsigned long used;
 832                 unsigned long long wasted;
 833                 unsigned long long objwaste;
 834                 unsigned long percentage_partial_slabs;
 835                 unsigned long percentage_partial_objs;
 836
 837                 if (!s->slabs || !s->objects)
 838                         continue;
 839
 840                 used_slabs++;
 841
 842                 size = slab_size(s);
 843                 used = s->objects * s->object_size;
 844                 wasted = size - used;
 845                 objwaste = s->slab_size - s->object_size;
 846
 847                 percentage_partial_slabs = s->partial * 100 / s->slabs;
 848                 if (percentage_partial_slabs > 100)
 849                         percentage_partial_slabs = 100;
 850
 851                 percentage_partial_objs = s->objects_partial * 100
 852                                                         / s->objects;
 853
 854                 if (percentage_partial_objs > 100)
 855                         percentage_partial_objs = 100;
 856
 857                 if (s->object_size < min_objsize)
 858                         min_objsize = s->object_size;
 859                 if (s->partial < min_partial)
 860                         min_partial = s->partial;
 861                 if (s->slabs < min_slabs)
 862                         min_slabs = s->slabs;
 863                 if (size < min_size)
 864                         min_size = size;
 865                 if (wasted < min_waste)
 866                         min_waste = wasted;
 867                 if (objwaste < min_objwaste)
 868                         min_objwaste = objwaste;
 869                 if (s->objects < min_objects)
 870                         min_objects = s->objects;
 871                 if (used < min_used)
 872                         min_used = used;
 873                 if (s->objects_partial < min_partobj)
 874                         min_partobj = s->objects_partial;
 875                 if (percentage_partial_slabs < min_ppart)
 876                         min_ppart = percentage_partial_slabs;
 877                 if (percentage_partial_objs < min_ppartobj)
 878                         min_ppartobj = percentage_partial_objs;
 879                 if (s->slab_size < min_memobj)
 880                         min_memobj = s->slab_size;
 881
 882                 if (s->object_size > max_objsize)
 883                         max_objsize = s->object_size;
 884                 if (s->partial > max_partial)
 885                         max_partial = s->partial;
 886                 if (s->slabs > max_slabs)
 887                         max_slabs = s->slabs;
 888                 if (size > max_size)
 889                         max_size = size;
 890                 if (wasted > max_waste)
 891                         max_waste = wasted;
 892                 if (objwaste > max_objwaste)
 893                         max_objwaste = objwaste;
 894                 if (s->objects > max_objects)
 895                         max_objects = s->objects;
 896                 if (used > max_used)
 897                         max_used = used;
 898                 if (s->objects_partial > max_partobj)
 899                         max_partobj = s->objects_partial;
 900                 if (percentage_partial_slabs > max_ppart)
 901                         max_ppart = percentage_partial_slabs;
 902                 if (percentage_partial_objs > max_ppartobj)
 903                         max_ppartobj = percentage_partial_objs;
 904                 if (s->slab_size > max_memobj)
 905                         max_memobj = s->slab_size;
 906
 907                 total_partial += s->partial;
 908                 total_slabs += s->slabs;
 909                 total_size += size;
 910                 total_waste += wasted;
 911
 912                 total_objects += s->objects;
 913                 total_used += used;
 914                 total_partobj += s->objects_partial;
 915                 total_ppart += percentage_partial_slabs;
 916                 total_ppartobj += percentage_partial_objs;
 917
 918                 total_objwaste += s->objects * objwaste;
 919                 total_objsize += s->objects * s->slab_size;
 920         }
 921
 922         if (!total_objects) {
 923                 printf("No objects\n");
 924                 return;
 925         }
 926         if (!used_slabs) {
 927                 printf("No slabs\n");
 928                 return;
 929         }
 930
 931         /* Per slab averages */
 932         avg_partial = total_partial / used_slabs;
 933         avg_slabs = total_slabs / used_slabs;
 934         avg_size = total_size / used_slabs;
 935         avg_waste = total_waste / used_slabs;
 936
 937         avg_objects = total_objects / used_slabs;
 938         avg_used = total_used / used_slabs;
 939         avg_partobj = total_partobj / used_slabs;
 940         avg_ppart = total_ppart / used_slabs;
 941         avg_ppartobj = total_ppartobj / used_slabs;
 942
 943         /* Per object object sizes */
 944         avg_objsize = total_used / total_objects;
 945         avg_objwaste = total_objwaste / total_objects;
 946         avg_partobj = total_partobj * 100 / total_objects;
 947         avg_memobj = total_objsize / total_objects;
 948
 949         printf("Slabcache Totals\n");
 950         printf("----------------\n");
 951         printf("Slabcaches : %15d   Aliases  : %11d->%-3d  Active:    %3d\n",
 952                         slabs, aliases, alias_targets, used_slabs);
 953
 954         store_size(b1, total_size);store_size(b2, total_waste);
 955         store_size(b3, total_waste * 100 / total_used);
 956         printf("Memory used: %15s   # Loss   : %15s   MRatio:%6s%%\n", b1, b2, b3);
 957
 958         store_size(b1, total_objects);store_size(b2, total_partobj);
 959         store_size(b3, total_partobj * 100 / total_objects);
 960         printf("# Objects  : %15s   # PartObj: %15s   ORatio:%6s%%\n", b1, b2, b3);
 961
 962         printf("\n");
 963         printf("Per Cache         Average              "
 964                 "Min              Max            Total\n");
 965         printf("---------------------------------------"
 966                 "-------------------------------------\n");
 967
 968         store_size(b1, avg_objects);store_size(b2, min_objects);
 969         store_size(b3, max_objects);store_size(b4, total_objects);
 970         printf("#Objects  %15s  %15s  %15s  %15s\n",
 971                         b1,     b2,     b3,     b4);
 972
 973         store_size(b1, avg_slabs);store_size(b2, min_slabs);
 974         store_size(b3, max_slabs);store_size(b4, total_slabs);
 975         printf("#Slabs    %15s  %15s  %15s  %15s\n",
 976                         b1,     b2,     b3,     b4);
 977
 978         store_size(b1, avg_partial);store_size(b2, min_partial);
 979         store_size(b3, max_partial);store_size(b4, total_partial);
 980         printf("#PartSlab %15s  %15s  %15s  %15s\n",
 981                         b1,     b2,     b3,     b4);
 982         store_size(b1, avg_ppart);store_size(b2, min_ppart);
 983         store_size(b3, max_ppart);
 984         store_size(b4, total_partial * 100  / total_slabs);
 985         printf("%%PartSlab%15s%% %15s%% %15s%% %15s%%\n",
 986                         b1,     b2,     b3,     b4);
 987
 988         store_size(b1, avg_partobj);store_size(b2, min_partobj);
 989         store_size(b3, max_partobj);
 990         store_size(b4, total_partobj);
 991         printf("PartObjs  %15s  %15s  %15s  %15s\n",
 992                         b1,     b2,     b3,     b4);
 993
 994         store_size(b1, avg_ppartobj);store_size(b2, min_ppartobj);
 995         store_size(b3, max_ppartobj);
 996         store_size(b4, total_partobj * 100 / total_objects);
 997         printf("%% PartObj%15s%% %15s%% %15s%% %15s%%\n",
 998                         b1,     b2,     b3,     b4);
 999
1000         store_size(b1, avg_size);store_size(b2, min_size);
1001         store_size(b3, max_size);store_size(b4, total_size);
1002         printf("Memory    %15s  %15s  %15s  %15s\n",
1003                         b1,     b2,     b3,     b4);
1004
1005         store_size(b1, avg_used);store_size(b2, min_used);
1006         store_size(b3, max_used);store_size(b4, total_used);
1007         printf("Used      %15s  %15s  %15s  %15s\n",
1008                         b1,     b2,     b3,     b4);
1009
1010         store_size(b1, avg_waste);store_size(b2, min_waste);
1011         store_size(b3, max_waste);store_size(b4, total_waste);
1012         printf("Loss      %15s  %15s  %15s  %15s\n",
1013                         b1,     b2,     b3,     b4);
1014
1015         printf("\n");
1016         printf("Per Object        Average              "
1017                 "Min              Max\n");
1018         printf("---------------------------------------"
1019                 "--------------------\n");
1020
1021         store_size(b1, avg_memobj);store_size(b2, min_memobj);
1022         store_size(b3, max_memobj);
1023         printf("Memory    %15s  %15s  %15s\n",
1024                         b1,     b2,     b3);
1025         store_size(b1, avg_objsize);store_size(b2, min_objsize);
1026         store_size(b3, max_objsize);
1027         printf("User      %15s  %15s  %15s\n",
1028                         b1,     b2,     b3);
1029
1030         store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
1031         store_size(b3, max_objwaste);
1032         printf("Loss      %15s  %15s  %15s\n",
1033                         b1,     b2,     b3);
1034 }
1035
1036 static void sort_slabs(void)
1037 {
1038         struct slabinfo *s1,*s2;
1039
1040         for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
1041                 for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
1042                         int result;
1043
1044                         if (sort_size)
1045                                 result = slab_size(s1) < slab_size(s2);
1046                         else if (sort_active)
1047                                 result = slab_activity(s1) < slab_activity(s2);
1048                         else if (sort_loss)
1049                                 result = slab_waste(s1) < slab_waste(s2);
1050                         else
1051                                 result = strcasecmp(s1->name, s2->name);
1052
1053                         if (show_inverted)
1054                                 result = -result;
1055
1056                         if (result > 0) {
1057                                 struct slabinfo t;
1058
1059                                 memcpy(&t, s1, sizeof(struct slabinfo));
1060                                 memcpy(s1, s2, sizeof(struct slabinfo));
1061                                 memcpy(s2, &t, sizeof(struct slabinfo));
1062                         }
1063                 }
1064         }
1065 }
1066
1067 static void sort_aliases(void)
1068 {
1069         struct aliasinfo *a1,*a2;
1070
1071         for (a1 = aliasinfo; a1 < aliasinfo + aliases; a1++) {
1072                 for (a2 = a1 + 1; a2 < aliasinfo + aliases; a2++) {
1073                         char *n1, *n2;
1074
1075                         n1 = a1->name;
1076                         n2 = a2->name;
1077                         if (show_alias && !show_inverted) {
1078                                 n1 = a1->ref;
1079                                 n2 = a2->ref;
1080                         }
1081                         if (strcasecmp(n1, n2) > 0) {
1082                                 struct aliasinfo t;
1083
1084                                 memcpy(&t, a1, sizeof(struct aliasinfo));
1085                                 memcpy(a1, a2, sizeof(struct aliasinfo));
1086                                 memcpy(a2, &t, sizeof(struct aliasinfo));
1087                         }
1088                 }
1089         }
1090 }
1091
1092 static void link_slabs(void)
1093 {
1094         struct aliasinfo *a;
1095         struct slabinfo *s;
1096
1097         for (a = aliasinfo; a < aliasinfo + aliases; a++) {
1098
1099                 for (s = slabinfo; s < slabinfo + slabs; s++)
1100                         if (strcmp(a->ref, s->name) == 0) {
1101                                 a->slab = s;
1102                                 s->refs++;
1103                                 break;
1104                         }
1105                 if (s == slabinfo + slabs)
1106                         fatal("Unresolved alias %s\n", a->ref);
1107         }
1108 }
1109
1110 static void alias(void)
1111 {
1112         struct aliasinfo *a;
1113         char *active = NULL;
1114
1115         sort_aliases();
1116         link_slabs();
1117
1118         for(a = aliasinfo; a < aliasinfo + aliases; a++) {
1119
1120                 if (!show_single_ref && a->slab->refs == 1)
1121                         continue;
1122
1123                 if (!show_inverted) {
1124                         if (active) {
1125                                 if (strcmp(a->slab->name, active) == 0) {
1126                                         printf(" %s", a->name);
1127                                         continue;
1128                                 }
1129                         }
1130                         printf("\n%-12s <- %s", a->slab->name, a->name);
1131                         active = a->slab->name;
1132                 }
1133                 else
1134                         printf("%-15s -> %s\n", a->name, a->slab->name);
1135         }
1136         if (active)
1137                 printf("\n");
1138 }
1139
1140
1141 static void rename_slabs(void)
1142 {
1143         struct slabinfo *s;
1144         struct aliasinfo *a;
1145
1146         for (s = slabinfo; s < slabinfo + slabs; s++) {
1147                 if (*s->name != ':')
1148                         continue;
1149
1150                 if (s->refs > 1 && !show_first_alias)
1151                         continue;
1152
1153                 a = find_one_alias(s);
1154
1155                 if (a)
1156                         s->name = a->name;
1157                 else {
1158                         s->name = "*";
1159                         actual_slabs--;
1160                 }
1161         }
1162 }
1163
1164 static int slab_mismatch(char *slab)
1165 {
1166         return regexec(&pattern, slab, 0, NULL, 0);
1167 }
1168
1169 static void read_slab_dir(void)
1170 {
1171         DIR *dir;
1172         struct dirent *de;
1173         struct slabinfo *slab = slabinfo;
1174         struct aliasinfo *alias = aliasinfo;
1175         char *p;
1176         char *t;
1177         int count;
1178
1179         if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
1180                 fatal("SYSFS support for SLUB not active\n");
1181
1182         dir = opendir(".");
1183         while ((de = readdir(dir))) {
1184                 if (de->d_name[0] == '.' ||
1185                         (de->d_name[0] != ':' && slab_mismatch(de->d_name)))
1186                                 continue;
1187                 switch (de->d_type) {
1188                    case DT_LNK:
1189                         alias->name = strdup(de->d_name);
1190                         count = readlink(de->d_name, buffer, sizeof(buffer)-1);
1191
1192                         if (count < 0)
1193                                 fatal("Cannot read symlink %s\n", de->d_name);
1194
1195                         buffer[count] = 0;
1196                         p = buffer + count;
1197                         while (p > buffer && p[-1] != '/')
1198                                 p--;
1199                         alias->ref = strdup(p);
1200                         alias++;
1201                         break;
1202                    case DT_DIR:
1203                         if (chdir(de->d_name))
1204                                 fatal("Unable to access slab %s\n", slab->name);
1205                         slab->name = strdup(de->d_name);
1206                         slab->alias = 0;
1207                         slab->refs = 0;
1208                         slab->aliases = get_obj("aliases");
1209                         slab->align = get_obj("align");
1210                         slab->cache_dma = get_obj("cache_dma");
1211                         slab->cpu_slabs = get_obj("cpu_slabs");
1212                         slab->destroy_by_rcu = get_obj("destroy_by_rcu");
1213                         slab->hwcache_align = get_obj("hwcache_align");
1214                         slab->object_size = get_obj("object_size");
1215                         slab->objects = get_obj("objects");
1216                         slab->objects_partial = get_obj("objects_partial");
1217                         slab->objects_total = get_obj("objects_total");
1218                         slab->objs_per_slab = get_obj("objs_per_slab");
1219                         slab->order = get_obj("order");
1220                         slab->partial = get_obj("partial");
1221                         slab->partial = get_obj_and_str("partial", &t);
1222                         decode_numa_list(slab->numa_partial, t);
1223                         free(t);
1224                         slab->poison = get_obj("poison");
1225                         slab->reclaim_account = get_obj("reclaim_account");
1226                         slab->red_zone = get_obj("red_zone");
1227                         slab->sanity_checks = get_obj("sanity_checks");
1228                         slab->slab_size = get_obj("slab_size");
1229                         slab->slabs = get_obj_and_str("slabs", &t);
1230                         decode_numa_list(slab->numa, t);
1231                         free(t);
1232                         slab->store_user = get_obj("store_user");
1233                         slab->trace = get_obj("trace");
1234                         slab->alloc_fastpath = get_obj("alloc_fastpath");
1235                         slab->alloc_slowpath = get_obj("alloc_slowpath");
1236                         slab->free_fastpath = get_obj("free_fastpath");
1237                         slab->free_slowpath = get_obj("free_slowpath");
1238                         slab->free_frozen= get_obj("free_frozen");
1239                         slab->free_add_partial = get_obj("free_add_partial");
1240                         slab->free_remove_partial = get_obj("free_remove_partial");
1241                         slab->alloc_from_partial = get_obj("alloc_from_partial");
1242                         slab->alloc_slab = get_obj("alloc_slab");
1243                         slab->alloc_refill = get_obj("alloc_refill");
1244                         slab->free_slab = get_obj("free_slab");
1245                         slab->cpuslab_flush = get_obj("cpuslab_flush");
1246                         slab->deactivate_full = get_obj("deactivate_full");
1247                         slab->deactivate_empty = get_obj("deactivate_empty");
1248                         slab->deactivate_to_head = get_obj("deactivate_to_head");
1249                         slab->deactivate_to_tail = get_obj("deactivate_to_tail");
1250                         slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
1251                         slab->order_fallback = get_obj("order_fallback");
1252                         slab->cmpxchg_double_cpu_fail = get_obj("cmpxchg_double_cpu_fail");
1253                         slab->cmpxchg_double_fail = get_obj("cmpxchg_double_fail");
1254                         slab->cpu_partial_alloc = get_obj("cpu_partial_alloc");
1255                         slab->cpu_partial_free = get_obj("cpu_partial_free");
1256                         slab->alloc_node_mismatch = get_obj("alloc_node_mismatch");
1257                         slab->deactivate_bypass = get_obj("deactivate_bypass");
1258                         chdir("..");
1259                         if (slab->name[0] == ':')
1260                                 alias_targets++;
1261                         slab++;
1262                         break;
1263                    default :
1264                         fatal("Unknown file type %lx\n", de->d_type);
1265                 }
1266         }
1267         closedir(dir);
1268         slabs = slab - slabinfo;
1269         actual_slabs = slabs;
1270         aliases = alias - aliasinfo;
1271         if (slabs > MAX_SLABS)
1272                 fatal("Too many slabs\n");
1273         if (aliases > MAX_ALIASES)
1274                 fatal("Too many aliases\n");
1275 }
1276
1277 static void output_slabs(void)
1278 {
1279         struct slabinfo *slab;
1280         int lines = output_lines;
1281
1282         for (slab = slabinfo; (slab < slabinfo + slabs) &&
1283                         lines != 0; slab++) {
1284
1285                 if (slab->alias)
1286                         continue;
1287
1288                 if (lines != -1)
1289                         lines--;
1290
1291                 if (show_numa)
1292                         slab_numa(slab, 0);
1293                 else if (show_track)
1294                         show_tracking(slab);
1295                 else if (validate)
1296                         slab_validate(slab);
1297                 else if (shrink)
1298                         slab_shrink(slab);
1299                 else if (set_debug)
1300                         slab_debug(slab);
1301                 else if (show_ops)
1302                         ops(slab);
1303                 else if (show_slab)
1304                         slabcache(slab);
1305                 else if (show_report)
1306                         report(slab);
1307         }
1308 }
1309
1310 static void xtotals(void)
1311 {
1312         totals();
1313
1314         link_slabs();
1315         rename_slabs();
1316
1317         printf("\nSlabs sorted by size\n");
1318         printf("--------------------\n");
1319         sort_loss = 0;
1320         sort_size = 1;
1321         sort_slabs();
1322         output_slabs();
1323
1324         printf("\nSlabs sorted by loss\n");
1325         printf("--------------------\n");
1326         line = 0;
1327         sort_loss = 1;
1328         sort_size = 0;
1329         sort_slabs();
1330         output_slabs();
1331         printf("\n");
1332 }
1333
1334 struct option opts[] = {
1335         { "aliases", no_argument, NULL, 'a' },
1336         { "activity", no_argument, NULL, 'A' },
1337         { "debug", optional_argument, NULL, 'd' },
1338         { "display-activity", no_argument, NULL, 'D' },
1339         { "empty", no_argument, NULL, 'e' },
1340         { "first-alias", no_argument, NULL, 'f' },
1341         { "help", no_argument, NULL, 'h' },
1342         { "inverted", no_argument, NULL, 'i'},
1343         { "slabs", no_argument, NULL, 'l' },
1344         { "numa", no_argument, NULL, 'n' },
1345         { "ops", no_argument, NULL, 'o' },
1346         { "shrink", no_argument, NULL, 's' },
1347         { "report", no_argument, NULL, 'r' },
1348         { "Size", no_argument, NULL, 'S'},
1349         { "tracking", no_argument, NULL, 't'},
1350         { "Totals", no_argument, NULL, 'T'},
1351         { "validate", no_argument, NULL, 'v' },
1352         { "zero", no_argument, NULL, 'z' },
1353         { "1ref", no_argument, NULL, '1'},
1354         { "lines", required_argument, NULL, 'N'},
1355         { "Loss", no_argument, NULL, 'L'},
1356         { "Xtotals", no_argument, NULL, 'X'},
1357         { "Bytes", no_argument, NULL, 'B'},
1358         { "Unreclaim", no_argument, NULL, 'U'},
1359         { NULL, 0, NULL, 0 }
1360 };
1361
1362 int main(int argc, char *argv[])
1363 {
1364         int c;
1365         int err;
1366         char *pattern_source;
1367
1368         page_size = getpagesize();
1369
1370         while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTSN:LXBU",
1371                                                 opts, NULL)) != -1)
1372                 switch (c) {
1373                 case '1':
1374                         show_single_ref = 1;
1375                         break;
1376                 case 'a':
1377                         show_alias = 1;
1378                         break;
1379                 case 'A':
1380                         sort_active = 1;
1381                         break;
1382                 case 'd':
1383                         set_debug = 1;
1384                         if (!debug_opt_scan(optarg))
1385                                 fatal("Invalid debug option '%s'\n", optarg);
1386                         break;
1387                 case 'D':
1388                         show_activity = 1;
1389                         break;
1390                 case 'e':
1391                         show_empty = 1;
1392                         break;
1393                 case 'f':
1394                         show_first_alias = 1;
1395                         break;
1396                 case 'h':
1397                         usage();
1398                         return 0;
1399                 case 'i':
1400                         show_inverted = 1;
1401                         break;
1402                 case 'n':
1403                         show_numa = 1;
1404                         break;
1405                 case 'o':
1406                         show_ops = 1;
1407                         break;
1408                 case 'r':
1409                         show_report = 1;
1410                         break;
1411                 case 's':
1412                         shrink = 1;
1413                         break;
1414                 case 'l':
1415                         show_slab = 1;
1416                         break;
1417                 case 't':
1418                         show_track = 1;
1419                         break;
1420                 case 'v':
1421                         validate = 1;
1422                         break;
1423                 case 'z':
1424                         skip_zero = 0;
1425                         break;
1426                 case 'T':
1427                         show_totals = 1;
1428                         break;
1429                 case 'S':
1430                         sort_size = 1;
1431                         break;
1432                 case 'N':
1433                         if (optarg) {
1434                                 output_lines = atoi(optarg);
1435                                 if (output_lines < 1)
1436                                         output_lines = 1;
1437                         }
1438                         break;
1439                 case 'L':
1440                         sort_loss = 1;
1441                         break;
1442                 case 'X':
1443                         if (output_lines == -1)
1444                                 output_lines = 1;
1445                         extended_totals = 1;
1446                         show_bytes = 1;
1447                         break;
1448                 case 'B':
1449                         show_bytes = 1;
1450                         break;
1451                 case 'U':
1452                         unreclaim_only = 1;
1453                         break;
1454                 default:
1455                         fatal("%s: Invalid option '%c'\n", argv[0], optopt);
1456
1457         }
1458
1459         if (!show_slab && !show_alias && !show_track && !show_report
1460                 && !validate && !shrink && !set_debug && !show_ops)
1461                         show_slab = 1;
1462
1463         if (argc > optind)
1464                 pattern_source = argv[optind];
1465         else
1466                 pattern_source = ".*";
1467
1468         err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
1469         if (err)
1470                 fatal("%s: Invalid pattern '%s' code %d\n",
1471                         argv[0], pattern_source, err);
1472         read_slab_dir();
1473         if (show_alias) {
1474                 alias();
1475         } else if (extended_totals) {
1476                 xtotals();
1477         } else if (show_totals) {
1478                 totals();
1479         } else {
1480                 link_slabs();
1481                 rename_slabs();
1482                 sort_slabs();
1483                 output_slabs();
1484         }
1485         return 0;
1486 }