diff options
| author | Joonsoo Kim <iamjoonsoo.kim@lge.com> | 2016-03-17 14:17:53 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-03-17 15:09:34 -0700 |
| commit | 922d566cdcb7166c729ff67bb15ff5f93a3774b6 (patch) | |
| tree | 88e23a5a52aa8286fe904725300c0ff0ae4e0f70 /mm/slub.c | |
| parent | f48d97f340cbb0c323fa7a7b36bd76a108a9f49f (diff) | |
| download | lwn-922d566cdcb7166c729ff67bb15ff5f93a3774b6.tar.gz lwn-922d566cdcb7166c729ff67bb15ff5f93a3774b6.zip | |
mm/slub: query dynamic DEBUG_PAGEALLOC setting
We can disable debug_pagealloc processing even if the code is compiled
with CONFIG_DEBUG_PAGEALLOC. This patch changes the code to query
whether it is enabled or not in runtime.
[akpm@linux-foundation.org: clean up code, per Christian]
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Chris Metcalf <cmetcalf@ezchip.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Takashi Iwai <tiwai@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/slub.c')
| -rw-r--r-- | mm/slub.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/mm/slub.c b/mm/slub.c index 712d53474082..2f2f04d39104 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -254,11 +254,10 @@ static inline void *get_freepointer_safe(struct kmem_cache *s, void *object) { void *p; -#ifdef CONFIG_DEBUG_PAGEALLOC + if (!debug_pagealloc_enabled()) + return get_freepointer(s, object); + probe_kernel_read(&p, (void **)(object + s->offset), sizeof(p)); -#else - p = get_freepointer(s, object); -#endif return p; } |