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| author | Vegard Nossum <vegard.nossum@gmail.com> | 2008-04-04 00:54:48 +0200 |
|---|---|---|
| committer | Vegard Nossum <vegard.nossum@gmail.com> | 2009-06-15 12:40:07 +0200 |
| commit | 5a896d9e7c921742d0437a452f991288f4dc2c42 (patch) | |
| tree | ea21c8fcfb4524ae5bfc68681920dd9a15b30795 /mm/slub.c | |
| parent | d7002857dee6e9a3ce1f78d23f37caba106b29c5 (diff) | |
| download | linux-5a896d9e7c921742d0437a452f991288f4dc2c42.tar.gz | |
slub: add hooks for kmemcheck
Parts of this patch were contributed by Pekka Enberg but merged for atomicity. Cc: Christoph Lameter <clameter@sgi.com> Signed-off-by: Vegard Nossum <vegardno@ifi.uio.no> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Ingo Molnar <mingo@elte.hu> [rebased for mainline inclusion] Signed-off-by: Vegard Nossum <vegardno@ifi.uio.no>
Diffstat (limited to 'mm/slub.c')
| -rw-r--r-- | mm/slub.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/mm/slub.c b/mm/slub.c index 3964d3ce4c15..1cebaa747ad3 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -18,6 +18,7 @@ #include <linux/proc_fs.h> #include <linux/seq_file.h> #include <linux/kmemtrace.h> +#include <linux/kmemcheck.h> #include <linux/cpu.h> #include <linux/cpuset.h> #include <linux/kmemleak.h> @@ -147,7 +148,7 @@ SLAB_TRACE | SLAB_DESTROY_BY_RCU | SLAB_NOLEAKTRACE) #define SLUB_MERGE_SAME (SLAB_DEBUG_FREE | SLAB_RECLAIM_ACCOUNT | \ - SLAB_CACHE_DMA) + SLAB_CACHE_DMA | SLAB_NOTRACK) #ifndef ARCH_KMALLOC_MINALIGN #define ARCH_KMALLOC_MINALIGN __alignof__(unsigned long long) @@ -1092,6 +1093,13 @@ static struct page *allocate_slab(struct kmem_cache *s, gfp_t flags, int node) stat(get_cpu_slab(s, raw_smp_processor_id()), ORDER_FALLBACK); } + + if (kmemcheck_enabled + && !(s->flags & (SLAB_NOTRACK | DEBUG_DEFAULT_FLAGS))) + { + kmemcheck_alloc_shadow(s, flags, node, page, compound_order(page)); + } + page->objects = oo_objects(oo); mod_zone_page_state(page_zone(page), (s->flags & SLAB_RECLAIM_ACCOUNT) ? @@ -1165,6 +1173,9 @@ static void __free_slab(struct kmem_cache *s, struct page *page) __ClearPageSlubDebug(page); } + if (kmemcheck_page_is_tracked(page)) + kmemcheck_free_shadow(s, page, compound_order(page)); + mod_zone_page_state(page_zone(page), (s->flags & SLAB_RECLAIM_ACCOUNT) ? NR_SLAB_RECLAIMABLE : NR_SLAB_UNRECLAIMABLE, @@ -1618,7 +1629,9 @@ static __always_inline void *slab_alloc(struct kmem_cache *s, if (unlikely((gfpflags & __GFP_ZERO) && object)) memset(object, 0, objsize); + kmemcheck_slab_alloc(s, gfpflags, object, c->objsize); kmemleak_alloc_recursive(object, objsize, 1, s->flags, gfpflags); + return object; } @@ -1751,6 +1764,7 @@ static __always_inline void slab_free(struct kmem_cache *s, kmemleak_free_recursive(x, s->flags); local_irq_save(flags); c = get_cpu_slab(s, smp_processor_id()); + kmemcheck_slab_free(s, object, c->objsize); debug_check_no_locks_freed(object, c->objsize); if (!(s->flags & SLAB_DEBUG_OBJECTS)) debug_check_no_obj_freed(object, c->objsize); @@ -2625,7 +2639,8 @@ static noinline struct kmem_cache *dma_kmalloc_cache(int index, gfp_t flags) if (!s || !text || !kmem_cache_open(s, flags, text, realsize, ARCH_KMALLOC_MINALIGN, - SLAB_CACHE_DMA|__SYSFS_ADD_DEFERRED, NULL)) { + SLAB_CACHE_DMA|SLAB_NOTRACK|__SYSFS_ADD_DEFERRED, + NULL)) { kfree(s); kfree(text); goto unlock_out; @@ -4396,6 +4411,8 @@ static char *create_unique_id(struct kmem_cache *s) *p++ = 'a'; if (s->flags & SLAB_DEBUG_FREE) *p++ = 'F'; + if (!(s->flags & SLAB_NOTRACK)) + *p++ = 't'; if (p != name + 1) *p++ = '-'; p += sprintf(p, "%07d", s->size); |