linux-kernel - Re: Very slow disk speed after "IRQ: nobody cared"

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Message-ID: <4C1B36F8.9000907@kernel.org>
Date:	Fri, 18 Jun 2010 11:06:00 +0200
From:	Tejun Heo <tj@...nel.org>
To:	michal.svoboda@...nts.felk.cvut.cz, linux-kernel@...r.kernel.org
Subject: Re: Very slow disk speed after "IRQ: nobody cared"

On 06/18/2010 07:05 AM, Michal Svoboda wrote:
> Tejun Heo wrote:
>> Can you please post full boot log?
> 
> Yes, see below.
> 
>> Also, can you give a shot at the following git tree?
> 
> Is that a kernel branch?

Yeah, it's devel tree for better spurious/lost interrupt workaround.

> There are some obstacles. First, it's a production system, I can't
> experiment with swapping kernels too much. If I had a lead on a
> solution I would need to confirm that it worked/didn't work. Which
> is the second obstacle. The problem seems to appear at random with a
> very low frequency. I don't know how to reliably reproduce it. Do
> you have any advice on these?

Unfortunately, I can't think of an easy way to test and verify it.

Thanks.

-- 
tejun
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