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]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4E0C8DC9.6080402@redhat.com \
--to=josef@redhat.com \
--cc=linux-btrfs@vger.kernel.org \
--cc=rm@romanrm.ru \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).