From: Josef Bacik <josef@redhat.com>
To: Roman Mamedov <rm@romanrm.ru>
Cc: linux-btrfs <linux-btrfs@vger.kernel.org>
Subject: Re: btrfs lock-up on copying files
Date: Thu, 30 Jun 2011 10:52:57 -0400 [thread overview]
Message-ID: <4E0C8DC9.6080402@redhat.com> (raw)
In-Reply-To: <20110630204347.0d70506e@natsu>
On 06/30/2011 10:43 AM, Roman Mamedov wrote:
> On Thu, 30 Jun 2011 10:37:51 -0400
> Josef Bacik <josef@redhat.com> wrote:
>
>> Can you do sysrq+w when this happens? The caching kthread should still
>> be able to make progress, which is what we seem to be waiting on. Does
>> it eventually unhang and continue on? Thanks,
>
> Hello,
>
> Unfortunately I already rebooted that server so can't check SysRq+W.
> Before the reboot I waited for about 40 minutes, and the block device seemed to be 100% idle during all this time.
> I got an advice on IRC to wait for a couple of hours if this happens again, which I am going to try if it does.
>
Oh well crud I see what happened, the caching_kthread didn't even get
started, kthreadd got locked up waiting on the page lock for migration.
I will try and figure out what to do for this. Thanks for reporting it,
Josef
prev parent reply other threads:[~2011-06-30 14:52 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-30 6:37 btrfs lock-up on copying files Roman Mamedov
2011-06-30 14:37 ` Josef Bacik
2011-06-30 14:43 ` Roman Mamedov
2011-06-30 14:52 ` Josef Bacik [this message]
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