Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes

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To: Pavel Machek <pavel@...>
Cc: Chris Mason <chris.mason@...>, Andrew Morton <akpm@...>, Eric Sandeen <sandeen@...>, Andi Kleen <andi@...>, <linux-ext4@...>, <linux-kernel@...>, <linux-fsdevel@...>
Date: Wednesday, May 21, 2008 - 8:32 am

On Wed, May 21, 2008 at 01:22:25PM +0200, Pavel Machek wrote:

It is for me; I think we have to enable barriers for ext3/4, and then
work to improve the overhead in ext4/jbd2.  It's probably true that
the vast majority of systems don't run under conditions similar to
what Chris used to demonstrate the problem, but the default has to be
filesystem safety.  People who are sure they are extremely unlikely to
run into this problem can turn barriers off (and I suspect they won't
see that much difference in the most common workloads anyway).

    	      		    	     - Ted
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Messages in current thread:
[PATCH 0/4] (RESEND) ext3[34] barrier changes, Eric Sandeen, (Fri May 16, 3:02 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Andrew Morton, (Fri May 16, 4:05 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Eric Sandeen, (Thu May 29, 9:36 am)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Pavel Machek, (Mon May 19, 5:04 am)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Andi Kleen, (Sun May 18, 3:54 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Chris Mason, (Mon May 19, 9:26 am)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Jamie Lokier, (Tue May 20, 11:36 am)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Chris Mason, (Tue May 20, 12:02 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Jamie Lokier, (Tue May 20, 12:27 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Chris Mason, (Tue May 20, 1:08 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Jamie Lokier, (Tue May 20, 6:26 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Theodore Tso, (Mon May 19, 10:46 am)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Ric Wheeler, (Fri May 23, 2:33 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Jamie Lokier, (Fri May 16, 6:30 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Eric Sandeen, (Fri May 16, 4:53 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Jamie Lokier, (Fri May 16, 6:03 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Theodore Tso, (Sun May 18, 8:28 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Jamie Lokier, (Tue May 20, 11:13 am)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Greg Smith, (Wed May 21, 4:25 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Eric Sandeen, (Fri May 16, 6:21 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Andi Kleen, (Sun May 18, 4:03 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Theodore Tso, (Sun May 18, 8:43 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Eric Sandeen, (Sun May 18, 10:29 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Jamie Lokier, (Tue May 20, 7:35 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Andrew Morton, (Mon May 19, 12:11 am)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Chris Mason, (Mon May 19, 1:16 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Daniel Phillips, (Wed May 21, 6:30 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Jamie Lokier, (Tue May 20, 10:58 am)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Chris Mason, (Mon May 19, 2:39 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Pavel Machek, (Wed May 21, 7:22 am)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Andrew Morton, (Wed May 21, 2:03 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Jamie Lokier, (Wed May 21, 3:54 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Theodore Tso, (Wed May 21, 2:29 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Jamie Lokier, (Wed May 21, 3:36 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Chris Mason, (Wed May 21, 3:40 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Andrew Morton, (Wed May 21, 2:49 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Jamie Lokier, (Wed May 21, 3:42 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Eric Sandeen, (Wed May 21, 2:15 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Jamie Lokier, (Wed May 21, 3:43 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Theodore Tso, (Wed May 21, 8:32 am)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Jens Axboe, (Tue May 20, 4:25 am)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Chris Mason, (Tue May 20, 8:17 am)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Jan Kara, (Mon May 19, 6:39 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Chris Mason, (Mon May 19, 8:29 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Timothy Shimmin, (Mon May 19, 11:29 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Chris Mason, (Tue May 20, 8:04 am)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Jamie Lokier, (Fri May 16, 6:53 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Theodore Tso, (Fri May 16, 8:20 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Andrew Morton, (Fri May 16, 8:35 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Chris Mason, (Sat May 17, 8:48 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Jamie Lokier, (Tue May 20, 7:44 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Theodore Tso, (Sat May 17, 9:36 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Ric Wheeler, (Sun May 18, 10:49 am)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Jamie Lokier, (Tue May 20, 7:48 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Jamie Lokier, (Tue May 20, 10:42 am)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Theodore Tso, (Sat May 17, 9:43 am)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Theodore Tso, (Sat May 17, 4:44 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Jamie Lokier, (Tue May 20, 10:45 am)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Andreas Dilger, (Sat May 17, 1:59 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Andrew Morton, (Fri May 16, 4:58 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Jamie Lokier, (Fri May 16, 5:45 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Eric Sandeen, (Fri May 16, 6:03 pm)
Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes, Jamie Lokier, (Fri May 16, 6:09 pm)
[PATCH 4/4] ext4: call blkdev_issue_flush on fsync, Eric Sandeen, (Fri May 16, 3:09 pm)
Re: [PATCH 4/4] ext4: call blkdev_issue_flush on fsync, Theodore Tso, (Mon May 19, 10:34 pm)
Re: [PATCH 4/4] ext4: call blkdev_issue_flush on fsync, Jamie Lokier, (Tue May 20, 11:43 am)
Re: [PATCH 4/4] ext4: call blkdev_issue_flush on fsync, Jamie Lokier, (Tue May 20, 6:02 pm)
Re: [PATCH 4/4] ext4: call blkdev_issue_flush on fsync, Eric Sandeen, (Tue May 20, 11:52 am)
[PATCH 3/4] ext4: enable barriers by default, Eric Sandeen, (Fri May 16, 3:08 pm)
[PATCH 2/4] ext3: call blkdev_issue_flush on fsync, Eric Sandeen, (Fri May 16, 3:07 pm)
Re: [PATCH 2/4] ext3: call blkdev_issue_flush on fsync, Jamie Lokier, (Fri May 16, 6:15 pm)
[PATCH 1/4] ext3: enable barriers by default, Eric Sandeen, (Fri May 16, 3:05 pm)
Re: [PATCH 1/4] ext3: enable barriers by default, Pavel Machek, (Mon May 19, 4:58 am)