From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from gate2.alliedtelesis.co.nz ([2001:df5:b000:5::4])
 by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux))
 id 1dXbUs-0003y7-Bv
 for linux-mtd@lists.infradead.org; Tue, 18 Jul 2017 23:01:44 +0000
From: Kyeong Yoo <Kyeong.Yoo@alliedtelesis.co.nz>
To: Richard Weinberger <richard.weinberger@gmail.com>
CC: "linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>
Subject: Re: [PATCH] jffs2: GC deadlock reading a page that is used in
 jffs2_write_begin()
Date: Tue, 18 Jul 2017 23:00:58 +0000
Message-ID: <0e1399d9-a7ed-9838-7a03-0a1b18be2234@alliedtelesis.co.nz>
References: <149914202384.24318.7331828698981799313.stgit@kyeongy-dl.atlnz.lc>
 <7e0d37e6-c3de-5c17-72e1-f6003e5d7d4a@alliedtelesis.co.nz>
 <CAFLxGvwAJ+xfN=1QGfe_6mNksmMr6cTjSSRKPqYGKMi-1zvU2Q@mail.gmail.com>
In-Reply-To: <CAFLxGvwAJ+xfN=1QGfe_6mNksmMr6cTjSSRKPqYGKMi-1zvU2Q@mail.gmail.com>
Content-Language: en-US
Content-Type: text/plain; charset="utf-8"
Content-ID: <9B034B23CC0E4646BE37ABBEFE0EE164@atlnz.lc>
Content-Transfer-Encoding: base64
MIME-Version: 1.0
List-Id: Linux MTD discussion mailing list <linux-mtd.lists.infradead.org>
List-Unsubscribe: <http://lists.infradead.org/mailman/options/linux-mtd>,
 <mailto:linux-mtd-request@lists.infradead.org?subject=unsubscribe>
List-Archive: <http://lists.infradead.org/pipermail/linux-mtd/>
List-Post: <mailto:linux-mtd@lists.infradead.org>
List-Help: <mailto:linux-mtd-request@lists.infradead.org?subject=help>
List-Subscribe: <http://lists.infradead.org/mailman/listinfo/linux-mtd>,
 <mailto:linux-mtd-request@lists.infradead.org?subject=subscribe>
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