linux-kernel - [PATCH] Don't set relatime when noatime is specified

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Date:	Sun, 19 Apr 2009 18:40:43 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	viro@...iv.linux.org.uk, torvalds@...ux-foundation.org,
	linux-kernel@...r.kernel.org, mjg@...hat.com
Subject: [PATCH] Don't set relatime when noatime is specified

Don't set relatime when noatime is specified

Since 

commit 0a1c01c9477602ee8b44548a9405b2c1d587b5a2
Author: Matthew Garrett <mjg@...hat.com>
Date:   Thu Mar 26 17:53:14 2009 +0000

    Make relatime default

when a file system is mounted explicitely with noatime it gets both
relatime and noatime set. 

This shows up like this in /proc/mounts:

/dev/xxx /yyy ext3 rw,noatime,relatime,errors=continue,data=writeback 0 0

That looks strange.  The VFS uses noatime in this case, but both
flags are set. So it's more a cosmetic issue, but still better
to fix.

Cc: mjg@...hat.com

Signed-off-by: Andi Kleen <ak@...ux.intel.com>

---
 fs/namespace.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

Index: linux-2.6.30-rc2-ak/fs/namespace.c
===================================================================
--- linux-2.6.30-rc2-ak.orig/fs/namespace.c	2009-04-08 12:15:15.000000000 +0200
+++ linux-2.6.30-rc2-ak/fs/namespace.c	2009-04-19 18:13:11.000000000 +0200
@@ -1920,8 +1920,9 @@
 	if (data_page)
 		((char *)data_page)[PAGE_SIZE - 1] = 0;
 
-	/* Default to relatime */
-	mnt_flags |= MNT_RELATIME;
+	/* Default to relatime unless overriden */
+	if (!(flags & MS_NOATIME))
+		mnt_flags |= MNT_RELATIME;
 
 	/* Separate the per-mountpoint flags */
 	if (flags & MS_NOSUID)
--
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