pack-objects: fix delta cache size accounting

The wrong value was substracted from delta_cache_size when replacing
a cached delta, as trg_entry->delta_size was used after the old size
had been replaced by the new size.

Noticed by Linus.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin-pack-objects.c b/builtin-pack-objects.c
index 4f44658..350ece4 100644 (file)
--- a/builtin-pack-objects.c
+++ b/builtin-pack-objects.c
@@ -1422,10 +1422,6 @@ static int try_delta(struct unpacked *trg, struct unpacked *src,
                }
        }
 
-       trg_entry->delta = src_entry;
-       trg_entry->delta_size = delta_size;
-       trg->depth = src->depth + 1;
-
        /*
         * Handle memory allocation outside of the cache
         * accounting lock.  Compiler will optimize the strangeness
@@ -1439,7 +1435,7 @@ static int try_delta(struct unpacked *trg, struct unpacked *src,
                trg_entry->delta_data = NULL;
        }
        if (delta_cacheable(src_size, trg_size, delta_size)) {
-               delta_cache_size += trg_entry->delta_size;
+               delta_cache_size += delta_size;
                cache_unlock();
                trg_entry->delta_data = xrealloc(delta_buf, delta_size);
        } else {
@@ -1447,6 +1443,10 @@ static int try_delta(struct unpacked *trg, struct unpacked *src,
                free(delta_buf);
        }
 
+       trg_entry->delta = src_entry;
+       trg_entry->delta_size = delta_size;
+       trg->depth = src->depth + 1;
+
        return 1;
 }