redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

slab: add hooks for kmemcheck 

We now have SLAB support for kmemcheck! This means that it doesn't matter
whether one chooses SLAB or SLUB, or indeed whether Linus chooses to chuck
SLAB or SLUB.. ;-)

Cc: Ingo Molnar <mingo@elte.hu>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>

[rebased for mainline inclusion]
Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
hifive-unleashed-5.1
Pekka Enberg 2008-05-09 20:35:53 +02:00 committed by Vegard Nossum
parent 5a896d9e7c
commit c175eea466
1 changed files with 18 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
mm/slab.c
View File

@ -114,6 +114,7 @@
#include <linux/rtmutex.h>
#include <linux/reciprocal_div.h>
#include <linux/debugobjects.h>
#include <linux/kmemcheck.h>
#include <asm/cacheflush.h>
#include <asm/tlbflush.h>
@ -179,13 +180,13 @@
SLAB_STORE_USER | \
SLAB_RECLAIM_ACCOUNT | SLAB_PANIC | \
SLAB_DESTROY_BY_RCU | SLAB_MEM_SPREAD | \
SLAB_DEBUG_OBJECTS | SLAB_NOLEAKTRACE)
SLAB_DEBUG_OBJECTS | SLAB_NOLEAKTRACE | SLAB_NOTRACK)
#else
# define CREATE_MASK (SLAB_HWCACHE_ALIGN | \
SLAB_CACHE_DMA | \
SLAB_RECLAIM_ACCOUNT | SLAB_PANIC | \
SLAB_DESTROY_BY_RCU | SLAB_MEM_SPREAD | \
SLAB_DEBUG_OBJECTS | SLAB_NOLEAKTRACE)
SLAB_DEBUG_OBJECTS | SLAB_NOLEAKTRACE | SLAB_NOTRACK)
#endif
/*
@ -1624,6 +1625,10 @@ static void *kmem_getpages(struct kmem_cache *cachep, gfp_t flags, int nodeid)
NR_SLAB_UNRECLAIMABLE, nr_pages);
for (i = 0; i < nr_pages; i++)
__SetPageSlab(page + i);
if (kmemcheck_enabled && !(cachep->flags & SLAB_NOTRACK))
kmemcheck_alloc_shadow(cachep, flags, nodeid, page, cachep->gfporder);
return page_address(page);
}
@ -1636,6 +1641,9 @@ static void kmem_freepages(struct kmem_cache *cachep, void *addr)
struct page *page = virt_to_page(addr);
const unsigned long nr_freed = i;
if (kmemcheck_page_is_tracked(page))
kmemcheck_free_shadow(cachep, page, cachep->gfporder);
if (cachep->flags & SLAB_RECLAIM_ACCOUNT)
sub_zone_page_state(page_zone(page),
NR_SLAB_RECLAIMABLE, nr_freed);
@ -3309,6 +3317,9 @@ __cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid,
kmemleak_alloc_recursive(ptr, obj_size(cachep), 1, cachep->flags,
flags);
if (likely(ptr))
kmemcheck_slab_alloc(cachep, flags, ptr, obj_size(cachep));
if (unlikely((flags & __GFP_ZERO) && ptr))
memset(ptr, 0, obj_size(cachep));
@ -3367,6 +3378,9 @@ __cache_alloc(struct kmem_cache *cachep, gfp_t flags, void *caller)
flags);
prefetchw(objp);
if (likely(objp))
kmemcheck_slab_alloc(cachep, flags, objp, obj_size(cachep));
if (unlikely((flags & __GFP_ZERO) && objp))
memset(objp, 0, obj_size(cachep));
@ -3483,6 +3497,8 @@ static inline void __cache_free(struct kmem_cache *cachep, void *objp)
kmemleak_free_recursive(objp, cachep->flags);
objp = cache_free_debugcheck(cachep, objp, __builtin_return_address(0));
kmemcheck_slab_free(cachep, objp, obj_size(cachep));
/*
* Skip calling cache_free_alien() when the platform is not numa.
* This will avoid cache misses that happen while accessing slabp (which