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| author | Christoph Lameter <clameter@sgi.com> | 2007-05-15 01:42:06 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-15 08:54:01 -0700 |
| commit | cfbf07f2a80b618c42a42c20d83647ea8fcceca0 (patch) | |
| tree | 575c9834d1ed69459c79162042647008f2097123 /include | |
| parent | 6a3ee3d5529c5e66aedf91401bfac65c61998639 (diff) | |
| download | op-kernel-dev-cfbf07f2a80b618c42a42c20d83647ea8fcceca0.zip op-kernel-dev-cfbf07f2a80b618c42a42c20d83647ea8fcceca0.tar.gz | |
SLUB: CONFIG_LARGE_ALLOCS must consider MAX_ORDER limit
Take MAX_ORDER into consideration when determining KMALLOC_SHIFT_HIGH.
Otherwise we may run into a situation where we attempt to create general
slabs larger than MAX_ORDER.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/slub_def.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h index ea27065..fd6627e 100644 --- a/include/linux/slub_def.h +++ b/include/linux/slub_def.h @@ -60,7 +60,8 @@ struct kmem_cache { #define KMALLOC_SHIFT_LOW 3 #ifdef CONFIG_LARGE_ALLOCS -#define KMALLOC_SHIFT_HIGH 25 +#define KMALLOC_SHIFT_HIGH ((MAX_ORDER + PAGE_SHIFT) =< 25 ? \ + (MAX_ORDER + PAGE_SHIFT - 1) : 25) #else #if !defined(CONFIG_MMU) || NR_CPUS > 512 || MAX_NUMNODES > 256 #define KMALLOC_SHIFT_HIGH 20 @@ -87,6 +88,9 @@ static inline int kmalloc_index(int size) */ WARN_ON_ONCE(size == 0); + if (size >= (1 << KMALLOC_SHIFT_HIGH)) + return -1; + if (size > 64 && size <= 96) return 1; if (size > 128 && size <= 192) |
