mm, page_owner: rename flag indicating that page is allocated

Commit 37389167a281 ("mm, page_owner: keep owner info when freeing the
page") has introduced a flag PAGE_EXT_OWNER_ACTIVE to indicate that page
is tracked as being allocated.  Kirril suggested naming it
PAGE_EXT_OWNER_ALLOCATED to make it more clear, as "active is somewhat
loaded term for a page".

Link: http://lkml.kernel.org/r/20190930122916.14969-4-vbabka@suse.cz
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Suggested-by: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Walter Wu <walter-zh.wu@mediatek.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/linux/page_ext.h b/include/linux/page_ext.h
index 5e85651..cfce186 100644 (file)
--- a/include/linux/page_ext.h
+++ b/include/linux/page_ext.h
@@ -18,7 +18,7 @@ struct page_ext_operations {
 
 enum page_ext_flags {
        PAGE_EXT_OWNER,
-       PAGE_EXT_OWNER_ACTIVE,
+       PAGE_EXT_OWNER_ALLOCATED,
 #if defined(CONFIG_IDLE_PAGE_TRACKING) && !defined(CONFIG_64BIT)
        PAGE_EXT_YOUNG,
        PAGE_EXT_IDLE,

diff --git a/mm/page_owner.c b/mm/page_owner.c
index de1916a..e327bcd 100644 (file)
--- a/mm/page_owner.c
+++ b/mm/page_owner.c
@@ -152,7 +152,7 @@ void __reset_page_owner(struct page *page, unsigned int order)
        if (unlikely(!page_ext))
                return;
        for (i = 0; i < (1 << order); i++) {
-               __clear_bit(PAGE_EXT_OWNER_ACTIVE, &page_ext->flags);
+               __clear_bit(PAGE_EXT_OWNER_ALLOCATED, &page_ext->flags);
                page_owner = get_page_owner(page_ext);
                page_owner->free_handle = handle;
                page_ext = page_ext_next(page_ext);
@@ -173,7 +173,7 @@ static inline void __set_page_owner_handle(struct page *page,
                page_owner->gfp_mask = gfp_mask;
                page_owner->last_migrate_reason = -1;
                __set_bit(PAGE_EXT_OWNER, &page_ext->flags);
-               __set_bit(PAGE_EXT_OWNER_ACTIVE, &page_ext->flags);
+               __set_bit(PAGE_EXT_OWNER_ALLOCATED, &page_ext->flags);
 
                page_ext = page_ext_next(page_ext);
        }
@@ -247,7 +247,7 @@ void __copy_page_owner(struct page *oldpage, struct page *newpage)
         * the new page, which will be freed.
         */
        __set_bit(PAGE_EXT_OWNER, &new_ext->flags);
-       __set_bit(PAGE_EXT_OWNER_ACTIVE, &new_ext->flags);
+       __set_bit(PAGE_EXT_OWNER_ALLOCATED, &new_ext->flags);
 }
 
 void pagetypeinfo_showmixedcount_print(struct seq_file *m,
@@ -307,7 +307,7 @@ void pagetypeinfo_showmixedcount_print(struct seq_file *m,
                        if (unlikely(!page_ext))
                                continue;
 
-                       if (!test_bit(PAGE_EXT_OWNER_ACTIVE, &page_ext->flags))
+                       if (!test_bit(PAGE_EXT_OWNER_ALLOCATED, &page_ext->flags))
                                continue;
 
                        page_owner = get_page_owner(page_ext);
@@ -422,7 +422,7 @@ void __dump_page_owner(struct page *page)
                return;
        }
 
-       if (test_bit(PAGE_EXT_OWNER_ACTIVE, &page_ext->flags))
+       if (test_bit(PAGE_EXT_OWNER_ALLOCATED, &page_ext->flags))
                pr_alert("page_owner tracks the page as allocated\n");
        else
                pr_alert("page_owner tracks the page as freed\n");
@@ -512,7 +512,7 @@ read_page_owner(struct file *file, char __user *buf, size_t count, loff_t *ppos)
                 * Although we do have the info about past allocation of free
                 * pages, it's not relevant for current memory usage.
                 */
-               if (!test_bit(PAGE_EXT_OWNER_ACTIVE, &page_ext->flags))
+               if (!test_bit(PAGE_EXT_OWNER_ALLOCATED, &page_ext->flags))
                        continue;
 
                page_owner = get_page_owner(page_ext);