From: Tim Small <tim@seoss.co.uk>
To: Neil Brown <neilb@suse.de>
Cc: "linux-raid@vger.kernel.org" <linux-raid@vger.kernel.org>
Subject: Re: Deadlock in md barrier code? / RAID1 / LVM CoW snapshot + ext3 / Debian 5.0 - lenny 2.6.26 kernel
Date: Mon, 06 Dec 2010 15:42:31 +0000 [thread overview]
Message-ID: <4CFD0467.2060606@seoss.co.uk> (raw)
In-Reply-To: <20101122100509.76592b59@notabene.brown>
On 11/21/10 23:05, Neil Brown wrote:
> Yes. Superficially, it appears that there are still 5 outstanding read
> requests that are not being completed. I cannot guess how OpenVZ would
> cause that, but I don't really know much about OpenVZ
Hi Neil,
I very much appreciate your help debugging this.
I opened a bug against the relevant Debian kernel. Now that this is
pretty well characterised, I think it's probably best to just workaround
it (e.g. by setting speed_limit_max to 0 during the backups which were
tripping over this), until such time as the kernel can be replaced with
a more recent one...
Cheers,
Tim.
--
South East Open Source Solutions Limited
Registered in England and Wales with company number 06134732.
Registered Office: 2 Powell Gardens, Redhill, Surrey, RH1 1TQ
VAT number: 900 6633 53 http://seoss.co.uk/ +44-(0)1273-808309
next prev parent reply other threads:[~2010-12-06 15:42 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-17 14:53 Deadlock in md barrier code? / RAID1 / LVM CoW snapshot + ext3 / Debian 5.0 - lenny 2.6.26 kernel Tim Small
2010-09-17 22:59 ` Neil Brown
2010-09-20 19:59 ` Tim Small
2010-09-21 21:02 ` Tim Small
2010-09-21 22:30 ` Neil Brown
2010-10-12 13:59 ` Tim Small
2010-10-12 14:06 ` Tim Small
2010-10-12 16:48 ` CoolCold
2010-10-13 8:51 ` Tim Small
2010-10-13 13:00 ` CoolCold
2010-10-18 18:52 ` Tim Small
2010-10-19 6:16 ` Neil Brown
2010-10-19 16:24 ` Tim Small
2010-10-19 16:29 ` Tim Small
2010-10-19 19:29 ` Tim Small
2010-10-20 20:34 ` Tim Small
2010-10-20 23:04 ` Neil Brown
2010-11-18 18:04 ` Tim Small
2010-11-21 23:05 ` Neil Brown
2010-12-06 15:42 ` Tim Small [this message]
2010-09-21 22:21 ` Neil Brown
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