From mboxrd@z Thu Jan  1 00:00:00 1970
From: Bart Van Assche <Bart.VanAssche@wdc.com>
Subject: Re: [PATCH v8 03/10] md: Neither resync nor reshape while the system
 is frozen
Date: Thu, 12 Oct 2017 16:59:01 +0000
Message-ID: <1507827540.2448.29.camel@wdc.com>
References: <20171010210346.14574-1-bart.vanassche@wdc.com>
         <20171010210346.14574-4-bart.vanassche@wdc.com>
         <20171010223025.tda3lx64rdmugm54@kernel.org>
         <1507678384.2815.80.camel@wdc.com>
         <20171011014830.ps3v3yxny27wv7mc@kernel.org>
         <1507742275.2477.20.camel@wdc.com>
         <20171011193221.hkwvcysv6hahsncd@kernel.org>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <linux-raid-owner@vger.kernel.org>
In-Reply-To: <20171011193221.hkwvcysv6hahsncd@kernel.org>
Content-Language: en-US
Content-ID: <8F400BE7C5D23B4E89FB4899F05A07DB@namprd04.prod.outlook.com>
Sender: linux-raid-owner@vger.kernel.org
To: "shli@kernel.org" <shli@kernel.org>
Cc: "linux-block@vger.kernel.org" <linux-block@vger.kernel.org>, "jthumshirn@suse.de" <jthumshirn@suse.de>, "linux-raid@vger.kernel.org" <linux-raid@vger.kernel.org>, "hch@lst.de" <hch@lst.de>, "martin.petersen@oracle.com" <martin.petersen@oracle.com>, "axboe@kernel.dk" <axboe@kernel.dk>, "ming.lei@redhat.com" <ming.lei@redhat.com>, "linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>, "oleksandr@natalenko.name" <oleksandr@natalenko.name>, "hare@suse.com" <hare@suse.com>
List-Id: linux-raid.ids
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