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| author | Catalin Marinas <catalin.marinas@arm.com> | 2011-01-27 13:30:26 +0300 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2011-01-27 21:32:06 +0300 |
| commit | 6ae4bd1f0bc479984f30061b5e5116060c24a267 (patch) | |
| tree | d697010cf38907785a6283a26c02a081f0ea1e96 | |
| parent | 0a08739e81671de2cb690774937fe510c000b27f (diff) | |
| download | linux-6ae4bd1f0bc479984f30061b5e5116060c24a267.tar.xz | |
kmemleak: Allow kmemleak metadata allocations to fail
This patch adds __GFP_NORETRY and __GFP_NOMEMALLOC flags to the kmemleak
metadata allocations so that it has a smaller effect on the users of the
kernel slab allocator. Since kmemleak allocations can now fail more
often, this patch also reduces the verbosity by passing __GFP_NOWARN and
not dumping the stack trace when a kmemleak allocation fails.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Toralf Förster <toralf.foerster@gmx.de>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Ted Ts'o <tytso@mit.edu>
| -rw-r--r-- | mm/kmemleak.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/mm/kmemleak.c b/mm/kmemleak.c index bd9bc214091b..84225f3b7190 100644 --- a/mm/kmemleak.c +++ b/mm/kmemleak.c @@ -113,7 +113,9 @@ #define BYTES_PER_POINTER sizeof(void *) /* GFP bitmask for kmemleak internal allocations */ -#define GFP_KMEMLEAK_MASK (GFP_KERNEL | GFP_ATOMIC) +#define gfp_kmemleak_mask(gfp) (((gfp) & (GFP_KERNEL | GFP_ATOMIC)) | \ + __GFP_NORETRY | __GFP_NOMEMALLOC | \ + __GFP_NOWARN) /* scanning area inside a memory block */ struct kmemleak_scan_area { @@ -511,9 +513,10 @@ static struct kmemleak_object *create_object(unsigned long ptr, size_t size, struct kmemleak_object *object; struct prio_tree_node *node; - object = kmem_cache_alloc(object_cache, gfp & GFP_KMEMLEAK_MASK); + object = kmem_cache_alloc(object_cache, gfp_kmemleak_mask(gfp)); if (!object) { - kmemleak_stop("Cannot allocate a kmemleak_object structure\n"); + pr_warning("Cannot allocate a kmemleak_object structure\n"); + kmemleak_disable(); return NULL; } @@ -734,9 +737,9 @@ static void add_scan_area(unsigned long ptr, size_t size, gfp_t gfp) return; } - area = kmem_cache_alloc(scan_area_cache, gfp & GFP_KMEMLEAK_MASK); + area = kmem_cache_alloc(scan_area_cache, gfp_kmemleak_mask(gfp)); if (!area) { - kmemleak_warn("Cannot allocate a scan area\n"); + pr_warning("Cannot allocate a scan area\n"); goto out; } |