linux-kernel - Re: raid6 grow "hangs" on 2.6.27 with mounted FS

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Date:	Mon, 23 Mar 2009 06:09:32 +0200
From:	roma1390 <roma1390@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: Re: raid6 grow "hangs" on 2.6.27 with mounted FS

On Sun, Mar 22, 2009 at 12:41, roma1390 <roma1390@...il.com> wrote:
> On Sun, Mar 22, 2009 at 11:20, martin f krafft <madduck@...duck.net> wrote:
>> also sprach roma1390 <roma1390@...il.com> [2009.03.21.2129 +0100]:
>>> # add block device and grow, wait for resync
>>> mdadm --add /dev/md2  /dev/loop5
>>> mdadm --grow /dev/md2 --raid-devices=5
>>> sleep 3
>>>
>>> # dmesg prints: VFS: busy inodes on changed media.
>>> # umount hangs ...
>>> umount /dev/md2
>>
>> I suggest unmounting before growing?
>
> So this hang is by design? I think it must return EBUSY if can't
> continue operation.
> Documentation claims than Linux MD can grow online for raid5 and
> raid6, like You can resize online ext3 FS.

Got sysrq pending timers, blocked state, task trace, and full dmesg

Download attachment "dmesg" of type "application/octet-stream" (57923 bytes)