From: Dave Chinner <david@fromorbit.com>
To: Nick Piggin <npiggin@suse.de>
Cc: akpm@linux-foundation.org, xfs@oss.sgi.com,
linux-fsdevel@vger.kernel.org,
Chris Mason <chris.mason@oracle.com>,
linux-ext4@vger.kernel.org
Subject: Re: [patch 0/9] writeback data integrity and other fixes (take 3)
Date: Wed, 29 Oct 2008 16:27:07 +1100 [thread overview]
Message-ID: <20081029052707.GH4985@disturbed> (raw)
In-Reply-To: <20081029040014.GB17624@wotan.suse.de>
On Wed, Oct 29, 2008 at 05:00:14AM +0100, Nick Piggin wrote:
> On Wed, Oct 29, 2008 at 02:16:45PM +1100, Dave Chinner wrote:
> > FWIW, the core issue here is that we've got to do the
> > filemap_fdatawait() call in the ->fsync method because ->fsync
> > gets called before we've waited for the data I/O to complete.
> > XFS updates inode state on I/O completion, so we *must* wait
> > for data I/O to complete before logging the inode changes. I
> > think btrfs has the same problem....
>
> Interesting. Does that mean you can do without the final filemap_fdatawait?
We could, yes.
> Can you do the first fdatawait without i_mutex held?
I don't see why not - I/O completion is only touching the XFS inode.
XFS has it's own inode locks for I/O and inode exclusion, and the
mapping tree lock protects the tree walk that the fdatawait is
doing...
> There was some talk IIRC about moving all this logic into the filesystem
> to provide more flexibility here. If there is still enough interest,
> we should get that moving...
It would simplify some of the code in XFS, that's for sure ;)
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
next prev parent reply other threads:[~2008-10-29 5:27 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-28 14:47 [patch 0/9] writeback data integrity and other fixes (take 3) npiggin
2008-10-28 14:47 ` [patch 1/9] mm: write_cache_pages cyclic fix npiggin
2008-10-29 0:24 ` [patch 1.1/9] mm: write_cache_pages cyclic fix fix Nick Piggin
2008-10-28 14:47 ` [patch 2/9] mm: write_cache_pages early loop termination npiggin
2008-10-28 14:47 ` [patch 3/9] mm: write_cache_pages writepage error fix npiggin
2008-10-28 14:47 ` [patch 4/9] mm: write_cache_pages integrity fix npiggin
2008-10-28 14:47 ` [patch 5/9] mm: write_cache_pages cleanups npiggin
2008-10-28 14:47 ` [patch 6/9] mm: write_cache_pages optimise page cleaning npiggin
2008-10-28 14:47 ` [patch 7/9] mm: write_cache_pages terminate quickly npiggin
2008-10-30 23:07 ` Andrew Morton
2008-10-31 7:29 ` Nick Piggin
2008-10-28 14:47 ` [patch 8/9] mm: write_cache_pages more " npiggin
2008-10-28 14:47 ` [patch 9/9] mm: do_sync_mapping_range integrity fix npiggin
2008-10-30 23:13 ` Andrew Morton
2008-10-31 9:16 ` Nick Piggin
2008-10-31 10:04 ` Andrew Morton
2008-10-31 10:53 ` Nick Piggin
2008-10-31 20:03 ` Jamie Lokier
2008-10-31 14:10 ` Chris Mason
2008-10-31 14:30 ` steve
2008-10-31 15:02 ` Chris Mason
2008-11-01 8:04 ` Nick Piggin
2008-10-28 15:39 ` [patch 0/9] writeback data integrity and other fixes (take 3) Nick Piggin
2008-10-28 22:27 ` Dave Chinner
2008-10-29 0:04 ` Nick Piggin
2008-10-29 0:16 ` Nick Piggin
2008-10-29 3:16 ` Dave Chinner
2008-10-29 3:26 ` Dave Chinner
2008-10-29 4:11 ` Nick Piggin
2008-10-29 4:57 ` Dave Chinner
2008-10-29 5:06 ` Nick Piggin
2008-10-29 9:13 ` Christoph Hellwig
2008-10-29 21:42 ` Dave Chinner
2008-10-29 21:45 ` Christoph Hellwig
2008-10-29 21:53 ` Dave Chinner
2008-10-29 4:00 ` Nick Piggin
2008-10-29 5:27 ` Dave Chinner [this message]
2008-10-29 9:12 ` Christoph Hellwig
2008-10-29 9:21 ` Nick Piggin
2008-10-29 9:44 ` Christoph Hellwig
2008-10-29 10:30 ` Nick Piggin
2008-10-29 12:22 ` Jamie Lokier
2008-10-29 13:32 ` Ric Wheeler
2008-10-29 13:32 ` Ric Wheeler
2008-10-29 13:32 ` Ric Wheeler
2008-10-29 14:56 ` Chris Mason
[not found] ` <1225292196.6448.263.camel-cGoWVVl3WGUrkklhUoBCrlaTQe2KTcn/@public.gmane.org>
2008-10-30 2:16 ` Nick Piggin
2008-10-30 2:16 ` Nick Piggin
2008-10-30 2:16 ` Nick Piggin
[not found] ` <20081030021601.GF18041-B4tOwbsTzaBolqkO4TVVkw@public.gmane.org>
2008-10-30 12:51 ` jim owens
2008-10-30 12:51 ` jim owens
2008-10-30 12:51 ` jim owens
2008-10-30 13:41 ` Jim Rees
2008-10-29 21:43 ` Dave Chinner
2008-10-29 8:51 ` Dave Chinner
2008-10-28 23:14 ` Dave Chinner
2008-10-28 23:57 ` Nick Piggin
2008-10-29 0:05 ` Andrew Morton
2008-10-29 0:10 ` Nick Piggin
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