Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757564AbZCWJH2 (ORCPT ); Mon, 23 Mar 2009 05:07:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754764AbZCWJHP (ORCPT ); Mon, 23 Mar 2009 05:07:15 -0400 Received: from fg-out-1718.google.com ([72.14.220.153]:11282 "EHLO fg-out-1718.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754656AbZCWJHN (ORCPT ); Mon, 23 Mar 2009 05:07:13 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; b=sw62mXcSzG3rjmlXKdXZHsX0utKPmLm2O7J0kdVA5gQyxYdUwohXXeJ+w9FsRpO0jg 6W03z/X99YsKt558ds+a3dQd6JDtzCa3T9Mrh4XIE2jwAfS2uczQNIeY2aE4EyLXzZpM muQTZvDo8INGtP3loA5Ro4jXRpODCfDMNEXQQ= Message-ID: <49C7513D.4080106@gmail.com> Date: Mon, 23 Mar 2009 11:07:09 +0200 From: roma1390 User-Agent: Thunderbird 2.0.0.19 (X11/20090212) MIME-Version: 1.0 To: linux-kernel@vger.kernel.org CC: neilb@suse.de Subject: Re: raid6 grow "hangs" on 2.6.27 with mounted FS References: <18887.6136.84328.602390@notabene.brown> <49C74B4D.2060003@gmail.com> In-Reply-To: <49C74B4D.2060003@gmail.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1075 Lines: 32 roma1390 wrote: > Neil Brown wrote: > > This will only happen on very small arrays that take less than a > > couple of seconds for the reshape to complete. I have a patch for > > mdadm which makes it more robust in this situation. It will be in > > future releases. > > > > Does this explain what is happening to you? > > Yes, thanks. May be if I retest this situation with same kernel and > limited recovery bandwith, then may be i can't hit same problem again? Yes limiting speed also is posible workaround for this problem: ... echo 512 > /sys/block/md2/md/sync_speed_min echo 512 > /sys/block/md2/md/sync_speed_max mkfs.ext2 /dev/md2 mount /dev/md2 -t ext2 /mnt mdadm --add /dev/md2 /dev/loop5 mdadm --grow /dev/md2 --raid-devices=5 ... Bigger values (like 10000) doesn't help. Thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/