From: Christoph Hellwig <hch@infradead.org>
To: Theodore Tso <tytso@MIT.EDU>
Cc: Dave Chinner <david@fromorbit.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Jens Axboe <axboe@kernel.dk>, dave b <db.pub.mail@gmail.com>,
Sanjoy Mahajan <sanjoy@olin.edu>, Jesper Juhl <jj@chaosbits.net>,
Chris Mason <chris.mason@oracle.com>, Ingo Molnar <mingo@elte.hu>,
Pekka Enberg <penberg@kernel.org>,
Aidar Kultayev <the.aidar@gmail.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Andrew Morton <akpm@linux-foundation.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Nick Piggin <npiggin@suse.de>,
Arjan van de Ven <arjan@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>,
Corrado Zoccolo <czoccolo@gmail.com>,
Shaohua Li <shaohua.li@intel.com>,
Steven Barrett <damentz@gmail.com>
Subject: Re: 2.6.36 io bring the system to its knees
Date: Wed, 10 Nov 2010 09:57:12 -0500 [thread overview]
Message-ID: <20101110145712.GB22073@infradead.org> (raw)
In-Reply-To: <C70A546B-6BC5-49CA-9E34-E69F494A71A0@mit.edu>
On Wed, Nov 10, 2010 at 09:33:29AM -0500, Theodore Tso wrote:
> The chance that this occurs using data=writeback in ext4 is much less, BTW, because with delayed allocation we delay updating the inode until right before we write the block. I have a plan for changing things so that we write the data blocks *first* and then update the metadata blocks second, which will mean that ext4 data=ordered will go away entirely, and we'll get both the safety and as well as avoiding the forced data page writeouts during journal commits.
That's the scheme used by XFS and btrfs in one form or another. Chris
also had a patch to implement it for ext3, which unfortunately fell
under the floor.
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@infradead.org>
To: Theodore Tso <tytso@MIT.EDU>
Cc: Dave Chinner <david@fromorbit.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Jens Axboe <axboe@kernel.dk>, dave b <db.pub.mail@gmail.com>,
Sanjoy Mahajan <sanjoy@olin.edu>, Jesper Juhl <jj@chaosbits.net>,
Chris Mason <chris.mason@oracle.com>, Ingo Molnar <mingo@elte.hu>,
Pekka Enberg <penberg@kernel.org>,
Aidar Kultayev <the.aidar@gmail.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Andrew Morton <akpm@linux-foundation.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Nick Piggin <npiggin@suse.de>,
Arjan van de Ven <arjan@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>,
Corrado Zoccolo <czoccolo@gmail.com>,
Shaohua Li <shaohua.li@intel.com>,
Steven Barrett <damentz@gmail.com>
Subject: Re: 2.6.36 io bring the system to its knees
Date: Wed, 10 Nov 2010 09:57:12 -0500 [thread overview]
Message-ID: <20101110145712.GB22073@infradead.org> (raw)
In-Reply-To: <C70A546B-6BC5-49CA-9E34-E69F494A71A0@mit.edu>
On Wed, Nov 10, 2010 at 09:33:29AM -0500, Theodore Tso wrote:
> The chance that this occurs using data=writeback in ext4 is much less, BTW, because with delayed allocation we delay updating the inode until right before we write the block. I have a plan for changing things so that we write the data blocks *first* and then update the metadata blocks second, which will mean that ext4 data=ordered will go away entirely, and we'll get both the safety and as well as avoiding the forced data page writeouts during journal commits.
That's the scheme used by XFS and btrfs in one form or another. Chris
also had a patch to implement it for ext3, which unfortunately fell
under the floor.
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next prev parent reply other threads:[~2010-11-10 14:57 UTC|newest]
Thread overview: 130+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <AANLkTimt7wzR9RwGWbvhiOmot_zzayfCfSh_-v6yvuAP@mail.gmail.com>
2010-10-26 13:00 ` Fwd: 2.6.36 io bring the system to its knees Aidar Kultayev
[not found] ` <AANLkTinzJ9a+9w7G5X0uZpX2o-L8E6XW98VFKoF1R_-S@mail.gmail.com>
2010-10-28 6:09 ` Aidar Kultayev
2010-10-28 6:32 ` Pekka Enberg
2010-10-28 6:32 ` Pekka Enberg
2010-10-28 9:00 ` Ingo Molnar
2010-10-28 9:00 ` Ingo Molnar
2010-10-28 9:34 ` Pekka Enberg
2010-10-28 9:34 ` Pekka Enberg
2010-10-28 11:16 ` Pekka Enberg
2010-10-28 11:16 ` Pekka Enberg
2010-10-28 11:33 ` Aidar Kultayev
2010-10-28 11:33 ` Aidar Kultayev
2010-10-28 11:48 ` Pekka Enberg
2010-10-28 11:48 ` Pekka Enberg
2010-10-28 12:18 ` Aidar Kultayev
2010-10-28 12:18 ` Aidar Kultayev
2010-10-28 13:46 ` Christoph Hellwig
2010-10-28 13:46 ` Christoph Hellwig
2010-10-28 13:54 ` Ingo Molnar
2010-10-28 13:54 ` Ingo Molnar
2010-10-28 13:30 ` Ingo Molnar
2010-10-28 13:30 ` Ingo Molnar
2010-10-28 13:47 ` Christoph Hellwig
2010-10-28 13:47 ` Christoph Hellwig
2010-10-28 13:50 ` Ingo Molnar
2010-10-28 13:50 ` Ingo Molnar
2010-10-28 17:01 ` Chris Mason
2010-10-28 17:01 ` Chris Mason
2010-10-28 17:57 ` Pekka Enberg
2010-10-28 17:57 ` Pekka Enberg
2010-10-29 14:52 ` Ted Ts'o
2010-10-29 14:52 ` Ted Ts'o
2010-10-29 15:33 ` Aidar Kultayev
2010-10-29 15:33 ` Aidar Kultayev
2010-10-30 9:14 ` Ingo Molnar
2010-10-30 9:14 ` Ingo Molnar
2010-10-30 13:02 ` Aidar Kultayev
2010-10-30 13:02 ` Aidar Kultayev
2010-10-30 19:06 ` Chris Mason
2010-10-30 19:06 ` Chris Mason
2010-10-31 2:31 ` Ted Ts'o
2010-10-31 2:31 ` Ted Ts'o
2010-10-31 17:49 ` Corrado Zoccolo
2010-10-31 17:49 ` Corrado Zoccolo
2010-11-02 3:10 ` Shaohua Li
2010-11-02 3:10 ` Shaohua Li
2010-11-02 11:47 ` Sanjoy Mahajan
2010-11-02 11:47 ` Sanjoy Mahajan
2010-11-02 13:12 ` Chris Mason
2010-11-02 13:12 ` Chris Mason
2010-11-04 16:05 ` Sanjoy Mahajan
2010-11-04 16:05 ` Sanjoy Mahajan
2010-11-04 23:35 ` Steven Barrett
2010-11-04 23:35 ` Steven Barrett
2010-11-04 23:44 ` Jesper Juhl
2010-11-04 23:44 ` Jesper Juhl
2010-11-04 23:48 ` Jesper Juhl
2010-11-04 23:48 ` Jesper Juhl
2010-11-05 1:43 ` Dave Chinner
2010-11-05 1:43 ` Dave Chinner
2010-11-05 12:48 ` Sanjoy Mahajan
2010-11-05 12:48 ` Sanjoy Mahajan
2010-11-06 14:10 ` dave b
2010-11-06 14:10 ` dave b
2010-11-06 15:12 ` Dave Chinner
2010-11-06 15:12 ` Dave Chinner
2010-11-07 6:06 ` dave b
2010-11-07 6:06 ` dave b
2010-11-07 12:08 ` Jens Axboe
2010-11-07 12:08 ` Jens Axboe
2010-11-07 15:50 ` Linus Torvalds
2010-11-07 15:50 ` Linus Torvalds
2010-11-10 1:32 ` Dave Chinner
2010-11-10 1:32 ` Dave Chinner
2010-11-10 2:01 ` dave b
2010-11-10 2:01 ` dave b
2010-11-10 8:08 ` Evgeniy Ivanov
2010-11-10 8:08 ` Evgeniy Ivanov
2010-11-10 8:24 ` Dave Chinner
2010-11-10 8:24 ` Dave Chinner
2010-11-10 14:22 ` Pavel Machek
2010-11-10 14:22 ` Pavel Machek
2010-11-10 14:20 ` Pavel Machek
2010-11-10 14:20 ` Pavel Machek
2010-11-10 14:27 ` Ingo Molnar
2010-11-10 14:27 ` Ingo Molnar
2010-11-10 14:55 ` Christoph Hellwig
2010-11-10 14:55 ` Christoph Hellwig
2010-11-10 19:09 ` Pavel Machek
2010-11-10 19:09 ` Pavel Machek
2010-11-10 14:33 ` Theodore Tso
2010-11-10 14:33 ` Theodore Tso
2010-11-10 14:57 ` Christoph Hellwig [this message]
2010-11-10 14:57 ` Christoph Hellwig
2010-11-10 15:00 ` Chris Mason
2010-11-10 15:00 ` Chris Mason
2010-11-10 23:36 ` Dave Chinner
2010-11-10 23:36 ` Dave Chinner
2010-11-10 15:59 ` Linus Torvalds
2010-11-10 15:59 ` Linus Torvalds
2010-11-10 16:46 ` Alexey Dobriyan
2010-11-10 16:46 ` Alexey Dobriyan
2010-11-10 16:55 ` Linus Torvalds
2010-11-10 16:55 ` Linus Torvalds
2010-11-10 17:10 ` Alexey Dobriyan
2010-11-10 17:10 ` Alexey Dobriyan
2010-11-10 18:55 ` Mark Lord
2010-11-10 18:55 ` Mark Lord
2010-11-10 18:27 ` Mike Galbraith
2010-11-10 18:27 ` Mike Galbraith
2010-11-10 23:43 ` Dave Chinner
2010-11-10 23:43 ` Dave Chinner
2010-11-06 19:10 ` Arjan van de Ven
2010-11-06 19:10 ` Arjan van de Ven
2010-11-07 17:16 ` Jesper Juhl
2010-11-07 17:16 ` Jesper Juhl
2010-11-09 19:47 ` Evgeniy Ivanov
2010-11-09 19:47 ` Evgeniy Ivanov
2010-11-09 20:20 ` Christoph Hellwig
2010-11-09 20:20 ` Christoph Hellwig
2010-11-09 21:00 ` Chris Mason
2010-11-09 21:00 ` Chris Mason
2010-10-31 1:22 ` Wu Fengguang
2010-10-31 1:22 ` Wu Fengguang
2010-10-31 1:51 ` Wu Fengguang
2010-10-31 1:51 ` Wu Fengguang
2010-11-01 1:09 ` Dimitrios Apostolou
2010-11-01 1:09 ` Dimitrios Apostolou
2010-11-02 1:20 ` Wu Fengguang
2010-11-02 1:20 ` Wu Fengguang
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