linux-kernel - Re: [PATCH 2/3] sparc64: implement page mapping percpu first chunk allocator

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Date:	Tue, 29 Sep 2009 09:14:58 +0900
From:	Tejun Heo <tj@...nel.org>
To:	David Miller <davem@...emloft.net>
CC:	linux-kernel@...r.kernel.org, rusty@...tcorp.com.au,
	cl@...ux-foundation.org, mingo@...e.hu, hpa@...or.com
Subject: Re: [PATCH 2/3] sparc64: implement page mapping percpu first chunk
 allocator

Hello, David.

David Miller wrote:
> From: Tejun Heo <tj@...nel.org>
> Date: Thu, 24 Sep 2009 21:56:32 +0900
> 
>> Implement page mapping percpu first chunk allocator as a fallback to
>> the embedding allocator.  The next patch will make the embedding
>> allocator check distances between units to determine whether it fits
>> within the vmalloc area so that this fallback can be used on such
>> cases.
>>
>> sparc64 currently has relatively small vmalloc area which makes it
>> impossible to create any dynamic chunks on certain configurations
>> leading to percpu allocation failures.  This and the next patch should
>> allow those configurations to keep working until proper solution is
>> found.
>>
>> Signed-off-by: Tejun Heo <tj@...nel.org>
>> ---
>> David, can you please ack this after reviewing?
> 
> Tejun I am testing out the following patch which will make these
> patches of your's basically unnecessary:

Ah... great but unless you object, I think it would be better to push
it out anyway just to make things a bit more robust and ease tracking
and debugging when something goes wrong.  The added code is small and
ditched once boot is complete.  What do you think?

Thanks.

-- 
tejun
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