From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Jianpeng Ma" <majianpeng@gmail.com>
Subject: Re: [patch]raid5: fix directio regression
Date: Tue, 7 Aug 2012 13:13:02 +0800
Message-ID: <201208071312593120932@gmail.com>
References: <20120807032240.GA22495@kernel.org>
Mime-Version: 1.0
Content-Type: text/plain;
	charset="gb2312"
Content-Transfer-Encoding: base64
Return-path: <linux-raid-owner@vger.kernel.org>
Sender: linux-raid-owner@vger.kernel.org
To: shli <shli@kernel.org>, linux-raid <linux-raid@vger.kernel.org>
Cc: Neil Brown <neilb@suse.de>
List-Id: linux-raid.ids
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