From: Dave Chinner <david@fromorbit.com>
To: Christof Schmitt <christof.schmitt@de.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>,
linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-fsdevel@vger.kernel.org
Subject: Re: Wrong DIF guard tag on ext2 write
Date: Thu, 3 Jun 2010 09:20:39 +1000 [thread overview]
Message-ID: <20100602232039.GA8287@dastard> (raw)
In-Reply-To: <20100602133748.GA11196@schmichrtp.mainz.de.ibm.com>
On Wed, Jun 02, 2010 at 03:37:48PM +0200, Christof Schmitt wrote:
> On Tue, Jun 01, 2010 at 09:16:35AM -0400, Martin K. Petersen wrote:
> > >>>>> "Christof" == Christof Schmitt <christof.schmitt@de.ibm.com> writes:
> >
> > >> Yep, known bug. Page writeback locking is messed up for buffer_head
> > >> users. The extNfs folks volunteered to look into this a while back
> > >> but I don't think they have found the time yet.
> >
> > Christof> Thanks for the info. This means that this bug appears with all
> > Christof> filesystems?
> >
> > XFS and btrfs should be fine.
>
> XFS looks good in my test, thanks for the hint. I am going to use XFS
> for anything related to DIF for now. It would be nice to have a
> solution that works for all filesystems, but it looks like this will
> take some time and work.
If you are running DIF hardware, then XFS is only OK for direct IO.
XFS will still get torn writes if you are overwriting buffered data
(either by write() or mmap()) because there are no interlocks to
prevent cached pages under writeback from being modified while DMA
is being performed.....
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
next prev parent reply other threads:[~2010-06-02 23:20 UTC|newest]
Thread overview: 79+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-31 11:28 Wrong DIF guard tag on ext2 write Christof Schmitt
2010-05-31 11:34 ` Christof Schmitt
2010-05-31 14:20 ` Martin K. Petersen
2010-05-31 14:46 ` Christof Schmitt
2010-06-01 13:16 ` Martin K. Petersen
2010-06-02 13:37 ` Christof Schmitt
2010-06-02 23:20 ` Dave Chinner [this message]
2010-06-04 1:34 ` Martin K. Petersen
2010-06-04 2:32 ` Dave Chinner
2010-06-07 16:20 ` Martin K. Petersen
2010-06-07 17:22 ` Boaz Harrosh
2010-06-07 17:40 ` Martin K. Petersen
2010-06-08 7:15 ` Christof Schmitt
2010-06-08 8:47 ` Dave Chinner
2010-06-08 8:52 ` Nick Piggin
2010-05-31 14:49 ` Nick Piggin
2010-06-01 13:17 ` Martin K. Petersen
2010-05-31 15:01 ` James Bottomley
2010-05-31 15:30 ` Boaz Harrosh
2010-05-31 15:49 ` Nick Piggin
2010-05-31 16:25 ` Boaz Harrosh
2010-06-01 13:22 ` Martin K. Petersen
2010-06-01 10:30 ` Christof Schmitt
2010-06-01 10:49 ` Boaz Harrosh
2010-06-01 13:03 ` Chris Mason
2010-06-01 13:50 ` Christof Schmitt
[not found] ` <20100601135059.GA21008@schmichrtp.mainz.de.ibm.com>
2010-06-01 13:58 ` Chris Mason
2010-06-08 7:18 ` Christof Schmitt
2010-06-01 14:26 ` Nick Piggin
2010-06-01 13:27 ` James Bottomley
2010-06-01 13:33 ` Chris Mason
2010-06-01 13:40 ` James Bottomley
2010-06-01 13:49 ` Chris Mason
2010-06-01 16:29 ` Matthew Wilcox
[not found] ` <20100601162929.GC32708@parisc-linux.org>
2010-06-01 16:47 ` Chris Mason
2010-06-01 16:54 ` James Bottomley
2010-06-01 18:09 ` Chris Mason
2010-06-01 18:46 ` Nick Piggin
[not found] ` <20100601184649.GE9453@laptop>
2010-06-01 19:35 ` Chris Mason
2010-06-02 3:20 ` Nick Piggin
[not found] ` <20100602032030.GF9453@laptop>
2010-06-02 13:17 ` Martin K. Petersen
2010-06-02 13:41 ` Nick Piggin
2010-06-03 15:46 ` Chris Mason
2010-06-03 16:27 ` Nick Piggin
2010-06-04 1:46 ` Martin K. Petersen
2010-06-04 3:09 ` Nick Piggin
2010-06-04 2:02 ` Dave Chinner
[not found] ` <20100604020243.GE19651@dastard>
2010-06-04 15:32 ` Jan Kara
2010-06-04 1:30 ` Martin K. Petersen
2010-06-01 21:07 ` James Bottomley
2010-06-01 22:49 ` Chris Mason
2010-06-01 13:50 ` Martin K. Petersen
2010-06-01 14:28 ` Nick Piggin
2010-06-01 14:32 ` James Bottomley
2010-06-01 14:54 ` Martin K. Petersen
2010-06-03 11:20 ` Vladislav Bolkhovitin
2010-06-03 12:07 ` Boaz Harrosh
2010-06-03 12:41 ` Vladislav Bolkhovitin
2010-06-03 12:46 ` Vladislav Bolkhovitin
2010-06-09 15:58 ` Vladislav Bolkhovitin
2010-06-03 13:06 ` Boaz Harrosh
2010-06-03 13:23 ` Vladislav Bolkhovitin
2010-07-23 17:59 ` Gennadiy Nerubayev
2010-07-23 19:16 ` Vladislav Bolkhovitin
2010-07-23 20:51 ` Gennadiy Nerubayev
2010-07-26 12:22 ` Vladislav Bolkhovitin
2010-07-26 17:00 ` Gennadiy Nerubayev
2010-07-26 19:26 ` Vladislav Bolkhovitin
2010-07-24 1:03 ` Dave Chinner
2010-06-01 2:40 ` FUJITA Tomonori
2010-06-03 16:09 ` [LFS/VM TOPIC] Stable pages while IO (was Wrong DIF guard tag on ext2 write) Boaz Harrosh
2010-06-03 16:30 ` [Lsf10-pc] " J. Bruce Fields
2010-06-03 17:41 ` Vladislav Bolkhovitin
2010-06-04 16:23 ` Jan Kara
2010-06-04 16:30 ` [Lsf10-pc] " J. Bruce Fields
2010-06-04 17:11 ` Jan Kara
2010-06-06 9:35 ` Boaz Harrosh
2010-06-06 23:37 ` Jan Kara
2010-06-07 8:30 ` Boaz Harrosh
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