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kernel: tweak the maximum allocation size to improve memory allocator performance

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15130 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd 2009-04-07 02:51:10 +00:00
parent 252c6645de
commit 4cabc27bca
1 changed files with 13 additions and 0 deletions
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13
target/linux/generic-2.6/patches-2.6.28/203-slab_maxsize.patch Normal file
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@ -0,0 +1,13 @@
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -115,8 +115,8 @@ int kmem_ptr_validate(struct kmem_cache
* to do various tricks to work around compiler limitations in order to
* ensure proper constant folding.
*/
-#define KMALLOC_SHIFT_HIGH ((MAX_ORDER + PAGE_SHIFT - 1) <= 25 ? \
- (MAX_ORDER + PAGE_SHIFT - 1) : 25)
+#define KMALLOC_SHIFT_HIGH ((MAX_ORDER + PAGE_SHIFT - 1) <= 17 ? \
+ (MAX_ORDER + PAGE_SHIFT - 1) : 17)
#define KMALLOC_MAX_SIZE (1UL << KMALLOC_SHIFT_HIGH)
#define KMALLOC_MAX_ORDER (KMALLOC_SHIFT_HIGH - PAGE_SHIFT)