From:   Kazuo Ito <ito_kazuo_g3@lab.ntt.co.jp>
Subject: [PATCH v2 0/2] pNFS block/SCSI layouts read-modify-write
 fix&improvement
Message-ID: <92b9e2a4-8880-3fc6-1f6a-e5ab85ed96e6@lab.ntt.co.jp>
Date:   Thu, 14 Feb 2019 18:34:57 +0900
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To:     Trond Myklebust <trond.myklebust@hammerspace.com>,
        anna.schumaker@netapp.com, linux-nfs@vger.kernel.org,
        konishi.ryusuke@lab.ntt.co.jp,
        =?UTF-8?B?T1PmuKHovro=?= <watanabe.hiroyuki@lab.ntt.co.jp>
Sender: linux-nfs-owner@vger.kernel.org
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This set of patches attempt to fix potential data integrity problem
in nfs_want_read_modify_write() and improve full page overwrite
performance of pNFS block/SCSI layouts.

The patch set comprises of two patches:
 - 1/2 "pNFS: Fix potential corruption of page being written"
   fixes the integrity issue
 - 2/2 "pNFS: Avoid read/modify/write when it is not necessary"
   addresses the cases where read/modify/write was requested for a full-
   page write.

v1 -> v2:
 - added the fix for missing PagePrivate in the pNFS block layout
 - made the check for full page write a separate inline function
 - merged the duplicated code for the pNFS block/SCSI layouts and
   for the other layout + normal NFS
 - type usage clean up (int to bool, unsigned to unsigned int)

kazuo ito (2):
  pNFS: Fix potential corruption of page being written
  pNFS: Avoid read/modify/write when it is not necessary

 fs/nfs/file.c | 40 ++++++++++++++++++++++++++--------------
 1 file changed, 26 insertions(+), 14 deletions(-)

-- 
2.20.1