b=21137 ext4 extent allocation is slower than in ext3

[fs/lustre-release.git] / ldiskfs / kernel_patches / patches / ext4-mballoc-extra-checks-rhel5.patch

diff --git a/ldiskfs/kernel_patches/patches/ext4-mballoc-extra-checks-rhel5.patch b/ldiskfs/kernel_patches/patches/ext4-mballoc-extra-checks-rhel5.patch
index 45e95bb..9e19012 100644 (file)
--- a/ldiskfs/kernel_patches/patches/ext4-mballoc-extra-checks-rhel5.patch
+++ b/ldiskfs/kernel_patches/patches/ext4-mballoc-extra-checks-rhel5.patch
@@ -332,6 +332,15 @@ Index: linux-2.6.18-128.1.6/fs/ext4/mballoc.h
 ===================================================================
 --- linux-2.6.18-128.1.6.orig/fs/ext4/mballoc.h
 +++ linux-2.6.18-128.1.6/fs/ext4/mballoc.h
+@@ -92,7 +92,7 @@
+ /*
+  * for which requests use 2^N search using buddies
+  */
+-#define MB_DEFAULT_ORDER2_REQS                2
++#define MB_DEFAULT_ORDER2_REQS                8
+
+ /*
+  * default group prealloc size 512 blocks
 @@ -228,7 +229,7 @@ struct ext4_mb_history {
        __u16 tail;     /* what tail broke some buddy */
        __u16 buddy;    /* buddy the tail ^^^ broke */