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 20:28:10 +0200 [thread overview]
Message-ID: <4FE8ADBA.20505@profihost.ag> (raw)
In-Reply-To: <20120625180252.GD7404@localhost.localdomain>
Am 25.06.2012 20:02, schrieb Josef Bacik:
>> > 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.
>>
>
> Ouch, what kind of drive goes faster with discard _on_? Anyway it looks like
> we're waiting for the discard to come back, so either its your drive or theres a
> bug in the block layer. Maybe try an older kernel and see if it's broken there,
> and then bisect it down? Thanks,
Intel 520 series SSD. I can't try an older kernel version as ceph
crashes with them pretty fast due to other bugs which where fixed with
3.5-rc1.
Greets
Stefan
next prev parent reply other threads:[~2012-06-25 18:28 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
2012-06-25 18:02 ` Josef Bacik
2012-06-25 18:28 ` Stefan Priebe [this message]
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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