linux-kernel - Re: [PATCH 1/3] slqb: Do not use DEFINE_PER

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Message-ID: <4AB74129.90402@in.ibm.com>
Date:	Mon, 21 Sep 2009 14:32:33 +0530
From:	Sachin Sant <sachinp@...ibm.com>
To:	Mel Gorman <mel@....ul.ie>
CC:	Tejun Heo <tj@...nel.org>, Pekka Enberg <penberg@...helsinki.fi>,
	Nick Piggin <npiggin@...e.de>,
	Christoph Lameter <cl@...ux-foundation.org>,
	heiko.carstens@...ibm.com, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Subject: Re: [PATCH 1/3] slqb: Do not use DEFINE_PER_CPU for per-node data

Mel Gorman wrote:
>> I applied the three patches from Mel and one from Tejun.
>>     
>
> Thanks Sachin
>
> Was there any useful result from Tejun's patch applied on its own?
>   
Haven't tried with just the patch from Tejun. I will give this a try.
I might not get a chance to test this until late in the evening my time.
(Today being a holiday for me )

>> Tejun, the above hang looks exactly the same as the one
>> i have reported here :
>>
>> http://lists.ozlabs.org/pipermail/linuxppc-dev/2009-September/075791.html
>>
>> This particular hang was bisected to the following patch
>>
>> powerpc64: convert to dynamic percpu allocator
>>
>> This hang can be recreated without SLQB. So i think this is a different
>> problem. 
>>
>>     
>
> Was that bug ever resolved?
>   
The bug was still present with git9(78f28b..). With latest git
git10(ebc79c4 ..)i haven't tested it yet because of perf counter
build errors.

Thanks
-Sachin


-- 

---------------------------------
Sachin Sant
IBM Linux Technology Center
India Systems and Technology Labs
Bangalore, India
---------------------------------

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