From: johann <johann>
Date: Fri, 25 Sep 2009 13:52:49 +0000 (+0000)
Subject: Branch b1_8
X-Git-Tag: v1_9_280~43
X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=commitdiff_plain;h=73986ef941e317b477991ae4eb4862ddf502af3b

Branch b1_8
b=20205
i=girish

Disable write barrier on ext4/SLES11 as we did for ext3/SLES10, since
it seems to hurt write performance badly.
---

diff --git a/ldiskfs/kernel_patches/patches/ext4-disable-write-bar-by-default.patch b/ldiskfs/kernel_patches/patches/ext4-disable-write-bar-by-default.patch
new file mode 100644
index 0000000..1a9e9a3
--- /dev/null
+++ b/ldiskfs/kernel_patches/patches/ext4-disable-write-bar-by-default.patch
@@ -0,0 +1,13 @@
+Index: linux-stage/fs/ext4/super.c
+===================================================================
+--- linux-stage.orig/fs/ext4/super.c
++++ linux-stage/fs/ext4/super.c
+@@ -2457,7 +2457,7 @@ static int ext4_fill_super(struct super_
+ 	sbi->s_resgid = le16_to_cpu(es->s_def_resgid);
+ 
+ 	set_opt(sbi->s_mount_opt, RESERVATION);
+-	set_opt(sbi->s_mount_opt, BARRIER);
++	/* set_opt(sbi->s_mount_opt, BARRIER); */
+ 
+ 	/*
+ 	 * turn on extents feature by default in ext4 filesystem
diff --git a/ldiskfs/kernel_patches/series/ldiskfs-2.6-sles11.series b/ldiskfs/kernel_patches/series/ldiskfs-2.6-sles11.series
index 226eea2..bcf9753 100644
--- a/ldiskfs/kernel_patches/series/ldiskfs-2.6-sles11.series
+++ b/ldiskfs/kernel_patches/series/ldiskfs-2.6-sles11.series
@@ -32,3 +32,4 @@ ext4-osd-iam-exports.patch
 ext4-dynlocks-common-sles11.patch
 ext4-dynlocks-2.6-rhel5.patch
 ext4-hash-indexed-dir-dotdot-update.patch
+ext4-disable-write-bar-by-default.patch