linux-kernel - Re: [PATCH 3/9] xfs: factor out everything but the filemap_write_and_wait from xfs_file

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Message-ID: <x49mwybujvo.fsf@segfault.boston.devel.redhat.com>
Date:	Wed, 21 Nov 2012 09:10:35 -0500
From:	Jeff Moyer <jmoyer@...hat.com>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	"Darrick J. Wong" <darrick.wong@...cle.com>, axboe@...nel.dk,
	tytso@....edu, david@...morbit.com, bpm@....com,
	viro@...iv.linux.org.uk, jack@...e.cz,
	linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org,
	linux-kernel@...r.kernel.org, xfs@....sgi.com
Subject: Re: [PATCH 3/9] xfs: factor out everything but the filemap_write_and_wait from xfs_file_fsync

Christoph Hellwig <hch@...radead.org> writes:

> On Mon, Nov 19, 2012 at 11:41:38PM -0800, Darrick J. Wong wrote:
>> Hi,
>> 
>> Fsyncing is tricky business, so factor out the bits of the xfs_file_fsync
>> function that can be used from the I/O post-processing path.
>
> Why would we need to skip the filemap_write_and_wait_range call here?
> If we're doing direct I/O we should not have any pages in this regions
> anyway.  You're also not skipping it in the generic implementation as
> far as I can see, so I see no point in doing it just in XFS.

OK, I'll fix that.

Thanks!
Jeff
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