From mboxrd@z Thu Jan  1 00:00:00 1970
From: NeilBrown <neilb@suse.de>
Subject: Re: [PATCH] raid5: Avoid doing more read on dev of a stripe at the
 same time
Date: Wed, 26 Sep 2012 12:43:48 +1000
Message-ID: <20120926124348.3190990c@notabene.brown>
References: <2012091510203206229010@gmail.com>
	<20120920125144.0ed69ec3@notabene.brown>
	<201209201104415460652@gmail.com>
	<20120920132422.0f7841f1@notabene.brown>
	<201209211024418590971@gmail.com>
	<20120925172912.65db0e03@notabene.brown>
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To: NeilBrown <neilb@suse.de>
Cc: Jianpeng Ma <majianpeng@gmail.com>, linux-raid <linux-raid@vger.kernel.org>
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On Tue, 25 Sep 2012 17:29:12 +1000 NeilBrown <neilb@suse.de> wrote:

> On Fri, 21 Sep 2012 10:24:45 +0800 "Jianpeng Ma" <majianpeng@gmail.com> w=
rote:

> > Hi,
> >  i wrote a shell-script can reproduct this bug.
> > Note: mdadm -V
> > mdadm - v3.3-pre - Unreleased
> >=20
...

> Thanks a lot!
> I'll try this out and see what I find.

I've been running this script (with the mentioned version of mdadm) and
nothing has gone wrong.
The 'dd' keeps reporting read errors of course, as does the kernel, but not
crash or freeze or anything.

What exactly happens when you run it?  Do you get a kernel stack trace at a=
ll?
Can you post logs showing where it goes wrong?

Thanks,
NeilBrown


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