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
next prev parent 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
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