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authornbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>2009-04-07 02:51:10 +0000
committernbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>2009-04-07 02:51:10 +0000
commit4cabc27bcab33bb77551af6760d90b4a2ccfef96 (patch)
tree93c44841e86783f22c6967217d8798d79d6f7613 /target
parent252c6645de729b02dd844c81980e5db3a375306c (diff)
kernel: tweak the maximum allocation size to improve memory allocator performance
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15130 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target')
-rw-r--r--target/linux/generic-2.6/patches-2.6.28/203-slab_maxsize.patch13
1 files changed, 13 insertions, 0 deletions
diff --git a/target/linux/generic-2.6/patches-2.6.28/203-slab_maxsize.patch b/target/linux/generic-2.6/patches-2.6.28/203-slab_maxsize.patch
new file mode 100644
index 0000000000..25567f8488
--- /dev/null
+++ b/target/linux/generic-2.6/patches-2.6.28/203-slab_maxsize.patch
@@ -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)