Message-ID: <4CDC1A5F.9050803@redhat.com>
Date: Thu, 11 Nov 2010 11:31:27 -0500
From: Rik van Riel <riel@redhat.com>
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To: "Ted Ts'o" <tytso@mit.edu>, Jeff Layton <jlayton@redhat.com>,
        linux-kernel@vger.kernel.org, akpm@linux-foundation.org,
        esandeen@redhat.com, jmoyer@redhat.com, linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH] clear PageError bit in msync & fsync
References: <20101109114422.3918e7f6@annuminas.surriel.com> <20101109142109.224267d0@corrin.poochiereds.net> <4CD9A209.6070807@redhat.com> <20101109210715.GJ3099@thunk.org>
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On 11/09/2010 04:07 PM, Ted Ts'o wrote:

> Do we guarantee that the application will get EIO at least once?  I
> thought there were issues where the error bit could get lost if the
> page writeback was triggered by sync() run by a third-party
> application.

Andrew, both the current kernel before and after my patch does
not guarantee the behaviour Ted has pointed out is required.

Johannes came up with a way to guarantee that - I'll send in
a patch for that today.  That patch will obsolete the patch
I sent before (I don't think you've applied it yet).

-- 
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