From: Brad Campbell <brad@wasp.net.au>
To: Neil Brown <neilb@suse.de>
Cc: Chuck Ebbert <cebbert@redhat.com>,
Jens Axboe <jens.axboe@oracle.com>,
lkml <linux-kernel@vger.kernel.org>
Subject: Re: [OOPS] 2.6.21-rc6-git5 in cfq_dispatch_insert
Date: Tue, 17 Apr 2007 12:13:20 +0400 [thread overview]
Message-ID: <462481A0.4060707@wasp.net.au> (raw)
In-Reply-To: <17956.22235.574867.179016@notabene.brown>
Neil Brown wrote:
> On Monday April 16, cebbert@redhat.com wrote:
>> cfq_dispatch_insert() was called with rq == 0. This one is getting really
>> annoying... and md is involved again (RAID0 this time.)
>
> Yeah... weird.
> RAID0 is so light-weight and so different from RAID1 or RAID5 that I
> feel fairly safe concluding that the problem isn't in or near md.
> But that doesn't help you.
It's raid-5 here and it was degraded. I've just added the extra disk now and I've been running with
the deadline scheduler to work around the issue. I'll add Neil's patch and try some tests with cfq
tonight if I get the chance.
Brad
--
"Human beings, who are almost unique in having the ability
to learn from the experience of others, are also remarkable
for their apparent disinclination to do so." -- Douglas Adams
next prev parent reply other threads:[~2007-04-17 8:13 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-15 10:14 [OOPS] 2.6.21-rc6-git5 in cfq_dispatch_insert Brad Campbell
2007-04-15 10:49 ` Brad Campbell
2007-04-15 23:53 ` Adrian Bunk
2007-04-16 3:23 ` Brad Campbell
2007-04-16 22:39 ` Chuck Ebbert
2007-04-17 5:10 ` Neil Brown
2007-04-17 8:13 ` Brad Campbell [this message]
2007-04-17 11:48 ` Brad Campbell
2007-04-17 20:39 ` Bartlomiej Zolnierkiewicz
2007-04-18 12:37 ` Jens Axboe
2007-04-18 13:19 ` Brad Campbell
2007-04-18 13:21 ` Jens Axboe
2007-04-22 7:37 ` Brad Campbell
2007-04-23 7:35 ` Jens Axboe
2007-04-24 19:40 ` Brad Campbell
2007-04-25 8:34 ` Neil Brown
2007-04-25 8:46 ` Jens Axboe
2007-04-25 9:34 ` Jens Axboe
2007-04-25 9:37 ` Neil Brown
2007-04-25 9:47 ` Jens Axboe
2007-04-25 10:02 ` Brad Campbell
2007-04-25 10:18 ` Jens Axboe
2007-04-25 13:59 ` Roland Kuhn
2007-04-25 10:25 ` Neil Brown
2007-04-25 10:36 ` Jens Axboe
2007-04-25 9:54 ` Brad Campbell
2007-04-25 8:50 ` Brad Campbell
2007-04-25 10:06 ` Brad Campbell
2007-04-25 10:59 ` Neil Brown
2007-04-25 11:17 ` Degraded RAID performance - Was : " Brad Campbell
2007-04-18 13:19 ` Jens Axboe
[not found] <79880979-51BB-4D28-A3E8-3AE0F56F5B0A@e18.physik.tu-muenchen.de>
[not found] ` <20070424091807.GA3744@kernel.dk>
[not found] ` <6A6800B3-F9C8-4046-9E1C-A8CEA81B2CE0@e18.physik.tu-muenchen.de>
[not found] ` <20070424093904.GB3744@kernel.dk>
[not found] ` <20070424094003.GC3744@kernel.dk>
2007-04-24 12:27 ` Roland Kuhn
2007-04-24 12:32 ` Jens Axboe
2007-04-24 13:03 ` Roland Kuhn
2007-04-24 13:07 ` Jens Axboe
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