From: Marc MERLIN <marc@merlins.org>
To: Chris Murphy <lists@colorremedies.com>
Cc: Btrfs BTRFS <linux-btrfs@vger.kernel.org>
Subject: Re: 3.15rc5 deadlock
Date: Wed, 14 May 2014 16:47:06 -0700 [thread overview]
Message-ID: <20140514234706.GC12792@merlins.org> (raw)
In-Reply-To: <EB973584-8C25-4D12-9EA6-03584C38A9D7@colorremedies.com>
On Wed, May 14, 2014 at 05:13:20PM -0600, Chris Murphy wrote:
>
> On May 14, 2014, at 2:55 PM, Marc MERLIN <marc@merlins.org> wrote:
>
> > INFO: task btrfs:13329 blocked for more than 120 seconds.
>
> Pretty much anytime blocked for more than 120 seconds is reported, devs ask for sysrq-w. Typically that translates into three steps:
>
> echo 1 > /proc/sys/kernel/sysrq
> echo w > /proc/sysrq-trigger
> dmesg
>
> https://www.kernel.org/doc/Documentation/sysrq.txt
I took that just in case, but it's big (too long to be accepted on the
list), and inconvenient to share each time.
I was hoping the output of
legolas:~# ps -eo pid,user,args,wchan | grep btrfs
would do, but if not, I can upload the sysrq I have in my syslog.
Marc
--
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
.... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/ | PGP 1024R/763BE901
prev parent reply other threads:[~2014-05-14 23:47 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-14 11:40 3.15rc5 deadlock Marc MERLIN
2014-05-14 12:28 ` Chris Mason
2014-05-14 20:55 ` Marc MERLIN
2014-05-14 23:13 ` Chris Murphy
2014-05-14 23:47 ` Marc MERLIN [this message]
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