All of lore.kernel.org
 help / color / mirror / Atom feed
From: Stefan Priebe <s.priebe@profihost.ag>
To: Josef Bacik <jbacik@fusionio.com>
Cc: "linux-btrfs@vger.kernel.org" <linux-btrfs@vger.kernel.org>
Subject: Re: btrfs deadlock in 3.5-rc3
Date: Mon, 25 Jun 2012 19:38:38 +0200	[thread overview]
Message-ID: <4FE8A21E.7050104@profihost.ag> (raw)
In-Reply-To: <20120625144807.GC7404@localhost.localdomain>


Am 25.06.2012 16:48, schrieb Josef Bacik:
> On Mon, Jun 25, 2012 at 08:45:02AM -0600, Stefan Priebe - Profihost AG wrote:
>>>
>>> Thats weird, sysrq+w should have a bunch of stacktraces but it's empty, so
>>> unless theres a bug theres nothing blocked.  Is the box actually hung or is it
>>> just taking forever?  Maybe try sysrq+w again to see if the one you pasted was
>>> just a fluke?  Thanks,
>>
>> This one looks better:
>> http://pastebin.com/raw.php?i=R4pztDRt
>>
>
> Ok looks like you have discard turned on.
Yes

 >  Can you turn that off and see if you
> can still reproduce the deadlock?  If so sysrq+w again, if not then I know where
> to look ;).  Thanks,
without discard i can't reproduce but random write speed with ceph 
without discard is a LOT slower (around 8000 iops/s instead of 
13000iops/s). So i don't know if it is discard or if i'm just not able 
to trigger it.

Thanks!

Stefan

  reply	other threads:[~2012-06-25 17:38 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-06-23  8:50 btrfs deadlock in 3.5-rc3 Stefan Priebe
2012-06-23 13:46 ` Michael
2012-06-23 14:55   ` Stefan Priebe
2012-06-25 13:08 ` Josef Bacik
2012-06-25 14:08   ` Stefan Priebe - Profihost AG
2012-06-25 14:20     ` Josef Bacik
2012-06-25 14:45       ` Stefan Priebe - Profihost AG
2012-06-25 14:48         ` Josef Bacik
2012-06-25 17:38           ` Stefan Priebe [this message]
2012-06-25 18:02             ` Josef Bacik
2012-06-25 18:28               ` Stefan Priebe
2012-06-25 19:33                 ` Stefan Priebe
2012-06-25 20:11                   ` Josef Bacik
2012-06-25 20:20                     ` Stefan Priebe
2012-06-25 20:23                       ` Josef Bacik
2012-06-25 20:33                         ` Stefan Priebe
2012-06-26 16:47                         ` Stefan Priebe
2012-06-26 20:14                           ` Josef Bacik
2012-06-26 20:19                             ` Stefan Priebe
2012-06-26 20:48                               ` Josef Bacik
2012-06-27  5:47                                 ` Stefan Priebe - Profihost AG
2012-06-27 13:30                                   ` Josef Bacik
2012-06-27 21:17                                   ` Josef Bacik

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=4FE8A21E.7050104@profihost.ag \
    --to=s.priebe@profihost.ag \
    --cc=jbacik@fusionio.com \
    --cc=linux-btrfs@vger.kernel.org \
    /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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.