linux-kernel - Re: 2.6.21-rc4-mm1

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Message-ID: <460393A3.60502@shadowen.org>
Date:	Fri, 23 Mar 2007 08:45:23 +0000
From:	Andy Whitcroft <apw@...dowen.org>
To:	Con Kolivas <kernel@...ivas.org>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Steve Fox <drfickle@...ibm.com>,
	"Martin J. Bligh" <mbligh@...igh.org>
Subject: Re: 2.6.21-rc4-mm1

Con Kolivas wrote:
> On Friday 23 March 2007 05:17, Andy Whitcroft wrote:
>> Ok, I have yet a third x86_64 machine is is blowing up with the latest
>> 2.6.21-rc4-mm1+hotfixes+rsdl-0.32 but working with
>> 2.6.21-rc4-mm1+hotfixes-RSDL.  I have results on various hotfix levels
>> so I have just fired off a set of tests across the affected machines on
>> that latest hotfix stack plus the RSDL backout and the results should be
>> in in the next hour or two.
>>
>> I think there is a strong correlation between RSDL and these hangs.  Any
>> suggestions as to the next step.
> 
> Found a nasty in requeue_task
> +	if (list_empty(old_array->queue + old_prio))
> +		__clear_bit(old_prio, p->array->prio_bitmap);
> 
> see anything wrong there? I do :P
> 
> I'll queue that up with the other changes pending and hopefully that will fix 
> your bug.

Tests queued with your rdsl-0.33 patch (I am assuming its in there).
Will let you know how it looks.

-apw

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