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| author | Johannes Weiner <hannes@cmpxchg.org> | 2011-08-03 16:21:09 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-08-03 14:25:21 -1000 |
| commit | 3dab1bce8e840606e76f1bad5a009328e2aa35c7 (patch) | |
| tree | ab2b3a8f159497ec22bb9c98445a214116e86b4e /include/linux/gfp.h | |
| parent | f7b9fcbbc3b8593ff7dc587f90c2fe90a2fd1e6f (diff) | |
| download | op-kernel-dev-3dab1bce8e840606e76f1bad5a009328e2aa35c7.zip op-kernel-dev-3dab1bce8e840606e76f1bad5a009328e2aa35c7.tar.gz | |
mm: page_alloc: increase __GFP_BITS_SHIFT to include __GFP_OTHER_NODE
__GFP_OTHER_NODE is used for NUMA allocations on behalf of other nodes.
It's supposed to be passed through from the page allocator to
zone_statistics(), but it never gets there as gfp_allowed_mask is not
wide enough and masks out the flag early in the allocation path.
The result is an accounting glitch where successful NUMA allocations
by-agent are not properly attributed as local.
Increase __GFP_BITS_SHIFT so that it includes __GFP_OTHER_NODE.
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Andi Kleen <ak@linux.intel.com>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/gfp.h')
| -rw-r--r-- | include/linux/gfp.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/gfp.h b/include/linux/gfp.h index cb40892..3a76faf 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -92,7 +92,7 @@ struct vm_area_struct; */ #define __GFP_NOTRACK_FALSE_POSITIVE (__GFP_NOTRACK) -#define __GFP_BITS_SHIFT 23 /* Room for 23 __GFP_FOO bits */ +#define __GFP_BITS_SHIFT 24 /* Room for N __GFP_FOO bits */ #define __GFP_BITS_MASK ((__force gfp_t)((1 << __GFP_BITS_SHIFT) - 1)) /* This equals 0, but use constants in case they ever change */ |
