From: Johann Lombardi <johann.lombardi@oracle.com>
Date: Fri, 23 Jul 2010 21:54:55 +0000 (+0200)
Subject: b=23368 disable DELALLOC by default for RHEL5/ext4
X-Git-Tag: 1.8.4~6
X-Git-Url: https://git.whamcloud.com/gitweb?a=commitdiff_plain;h=3ac4425095cda0f1331f50a71213ec20091c59f2;p=fs%2Flustre-release.git

b=23368 disable DELALLOC by default for RHEL5/ext4

i=yangsheng

As for SLES11, we should disabled delayed allocation by default
since it is known to be buggy.
---

diff --git a/ldiskfs/kernel_patches/patches/ext4-disable-delalloc-rhel5.patch b/ldiskfs/kernel_patches/patches/ext4-disable-delalloc-rhel5.patch
new file mode 100644
index 0000000..40696db
--- /dev/null
+++ b/ldiskfs/kernel_patches/patches/ext4-disable-delalloc-rhel5.patch
@@ -0,0 +1,20 @@
+Disable the DELALLOC feature because it is not robust in ext4 versions < 2.6.31.
+
+--
+Index: linux-stage/fs/ext4/super.c
+===================================================================
+--- linux-stage.orig/fs/ext4/super.c
++++ linux-stage/fs/ext4/super.c
+@@ -2913,12 +2913,6 @@ static int ext4_fill_super(struct super_
+ 	if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS))
+ 		set_opt(sbi->s_mount_opt, EXTENTS);
+ 
+-	/*
+-	 * enable delayed allocation by default
+-	 * Use -o nodelalloc to turn it off
+-	 */
+-	set_opt(sbi->s_mount_opt, DELALLOC);
+-
+ 	if (!parse_options((char *) data, sb, &journal_devnum,
+ 			   &journal_ioprio, NULL, 0))
+ 		goto failed_mount;
diff --git a/ldiskfs/kernel_patches/series/ldiskfs-2.6-rhel5-ext4.series b/ldiskfs/kernel_patches/series/ldiskfs-2.6-rhel5-ext4.series
index fced48a..2b3c3d6 100644
--- a/ldiskfs/kernel_patches/series/ldiskfs-2.6-rhel5-ext4.series
+++ b/ldiskfs/kernel_patches/series/ldiskfs-2.6-rhel5-ext4.series
@@ -31,3 +31,4 @@ ext4-mballoc-skip-grps.patch
 ext4-back-dquot-to-rhel54.patch
 ext4-disable-mb-cache-rhel5.patch
 ext4-remove-extents-warning-rhel5.patch
+ext4-disable-delalloc-rhel5.patch