linux-kernel - Re: [PATCH 041/270] pnfsblock: fix partial page buffer wirte

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Message-ID: <1353983604.4266.44.camel@deadeye.wl.decadent.org.uk>
Date:	Tue, 27 Nov 2012 02:33:24 +0000
From:	Ben Hutchings <ben@...adent.org.uk>
To:	Peng Tao <tao.peng@....com>,
	Trond Myklebust <Trond.Myklebust@...app.com>
Cc:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com,
	Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH 041/270] pnfsblock: fix partial page buffer wirte

On Mon, 2012-11-26 at 14:55 -0200, Herton Ronaldo Krzesinski wrote:
> 3.5.7u1 -stable review patch.  If anyone has any objections, please let me know.
> 
> ------------------
> 
> From: Peng Tao <bergwolf@...il.com>
> 
> commit fe6e1e8d9fad86873eb74a26e80a8f91f9e870b5 upstream.
> 
> If applications use flock to protect its write range, generic NFS
> will not do read-modify-write cycle at page cache level. Therefore
> LD should know how to handle non-sector aligned writes. Otherwise
> there will be data corruption.
> 
> Signed-off-by: Peng Tao <tao.peng@....com>
> Signed-off-by: Trond Myklebust <Trond.Myklebust@...app.com>
> Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
[...]

I notice that this fix is missing from 3.4, and will need backporting.

Ben.

-- 
Ben Hutchings
Never attribute to conspiracy what can adequately be explained by stupidity.

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