kernel: tweak the maximum allocation size to improve memory allocator performance
authornbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>
Tue, 7 Apr 2009 02:51:10 +0000 (02:51 +0000)
committernbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>
Tue, 7 Apr 2009 02:51:10 +0000 (02:51 +0000)
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15130 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/generic-2.6/patches-2.6.28/203-slab_maxsize.patch [new file with mode: 0644]

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 (file)
index 0000000..25567f8
--- /dev/null
@@ -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)
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