[PATCH 041/270] pnfsblock: fix partial page buffer wirte

Ben Hutchings ben at decadent.org.uk
Tue Nov 27 02:33:24 UTC 2012


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 at gmail.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 at emc.com>
> Signed-off-by: Trond Myklebust <Trond.Myklebust at netapp.com>
> Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski at canonical.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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