Message-ID: <3F72B1BC.7080405@cyberone.com.au>
Date: Thu, 25 Sep 2003 19:13:32 +1000
From: Nick Piggin <piggin@cyberone.com.au>
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To: Aaron Lehmann <aaronl@vitelus.com>
CC: Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org
Subject: Re: Complete I/O starvation with 3ware raid on 2.6
References: <20030925071252.GE22525@vitelus.com> <20030925004301.171f6645.akpm@osdl.org> <20030925075852.GI22525@vitelus.com> <20030925011052.6f8beab2.akpm@osdl.org> <20030925083142.GK22525@vitelus.com>
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Aaron Lehmann wrote:

>On Thu, Sep 25, 2003 at 01:10:52AM -0700, Andrew Morton wrote:
>
>>A few things to run are `top', `ps' and `vmstat 1'.
>>
>
>The first two do not show any information out of the ordinary other
>than the fact that the load average is 11 while only two rsync
>processes are using any CPU at all.
>

But the load average will be 11 because there are processes stuck in the
kernel somewhere in D state. Have a look for them. They might be things
like pdflush, kswapd, scsi_*, etc. Try getting an Alt+SysRq+T dump of
them as well.


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