linux-kernel - Re: NFS BUG_ON in nfs_do

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Message-Id: <1240919978.7376.7.camel@heimdal.trondhjem.org>
Date:	Tue, 28 Apr 2009 07:59:38 -0400
From:	Trond Myklebust <trond.myklebust@....uio.no>
To:	Nick Piggin <npiggin@...e.de>
Cc:	linux-fsdevel@...r.kernel.org, Rince <rincebrain@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-nfs@...r.kernel.org
Subject: Re: NFS BUG_ON in nfs_do_writepage

On Tue, 2009-04-28 at 13:54 +0200, Nick Piggin wrote:
> If the page gets cleaned after page_mkwrite and before the page
> table locks are taken again in order to set the pte writeable.
> (actually, page_mkclean only runs if it finds mapcount elevated,
> so it is enough to clean the page even after the locks are taken
> and before mapcount is incremented in the case of __do_fault).

OK. This was what I was missing...

Thanks!

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