linux-kernel - Re: [Bug #32982] Kernel locks up a few minutes after boot

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Date:	Mon, 18 Apr 2011 20:21:00 +0200
From:	Bart Van Assche <bvanassche@....org>
To:	Jens Axboe <jaxboe@...ionio.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Maciej Rutecki <maciej.rutecki@...il.com>,
	Florian Mickler <florian@...kler.org>,
	Neil Brown <neilb@...e.de>
Subject: Re: [Bug #32982] Kernel locks up a few minutes after boot

On Mon, Apr 18, 2011 at 1:44 PM, Jens Axboe <jaxboe@...ionio.com> wrote:
> Bart, can you try and pull:
>
> git://git.kernel.dk/linux-2.6-block.git for-linus
>
> into Linus' tree and see if that works? This has, among other things,
> Neils fixes for MD.

md seems to work stable with the resulting tree, but it looks there is
a performance regression in the block layer not related to the md
issue. If I run a small block IOPS test on a block device created by
ib_srp (NOOP scheduler) I see about 11% less IOPS than with 2.6.38.3
(155.000 IOPS with 2.6.38.3 and 140.000 IOPS with 2.6.39-rc3+).

Bart.
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