linux-kernel - Re: [PATCH] ext4: fix blkdev_issue

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Message-Id: <1238413667.30488.2.camel@think.oraclecorp.com>
Date:	Mon, 30 Mar 2009 07:47:47 -0400
From:	Chris Mason <chris.mason@...cle.com>
To:	Eric Sandeen <sandeen@...hat.com>
Cc:	Theodore Tso <tytso@....edu>,
	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
	linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ext4: fix blkdev_issue_flush() failure handling

On Sun, 2009-03-29 at 22:22 -0500, Eric Sandeen wrote:
> Theodore Tso wrote:
> > On Sun, Mar 29, 2009 at 12:43:22PM -0500, Eric Sandeen wrote:
> >> As long as we keep the call there this is probably good, but after
> >> talking w/ Chris Mason, I think the call is extraneous anyway and should
> >> probably just be removed...
> >>
> > 
> > Yes, I agree, but it takes a lot of digging to be completely sure of
> > that it's safe to remove it.  Interestingly, it was you who added the
> > patch which added the call to blkdev_issue_flush():
> 
> > commit d755fb384250d6bd7fd18a0930e71965acc8e72e
> > Author: Eric Sandeen <sandeen@...hat.com>
> > Date:   Fri Jul 11 19:27:31 2008 -0400
> 
> 
> Yes, it was.  Although I got the idea when hch pointed out that SuSE did
> this... thanks to Chris.  It's come full circle.  :)

Grin.  I'm not sure the I_DIRTY checks alone are enough to decide that a
commit is required though.  I think the inode could be clean but still
have metadata that needs commit.

-chris


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