linux-kernel - Re: [GIT PULL tip:x86/mm]

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Message-ID: <20110302091731.GJ19669@htj.dyndns.org>
Date:	Wed, 2 Mar 2011 10:17:31 +0100
From:	Tejun Heo <tj@...nel.org>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	David Rientjes <rientjes@...gle.com>, Ingo Molnar <mingo@...e.hu>,
	tglx@...utronix.de, "H. Peter Anvin" <hpa@...or.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [GIT PULL tip:x86/mm]

Hello, Yinghai.

On Tue, Mar 01, 2011 at 02:19:13PM -0800, Yinghai Lu wrote:
> after looking at the code, it seems the cleanup does have several problems:
> 1. need to reserve temp numa dist.
> 	We only can use find_...without_reserve tricks when we are done with
> 	 the old one before get another new one.

Indeed, thanks for catching this.

> 2. during copying should only copy with NEW numa_dist_cnt size.
> 	so need to call numa_alloc_dist at first before copy.

It doesn't matter.  numa_set_distance() ignores distances for nodes
which are out of scope.

> 3. phys_dist whould numa_dist_cnt square size
> 4. numa_reset_distance should free numa_dist_cnt square size

Yeah, I seem to have completely forgotten about the square thing.
Stupid.

I'll regenerate patches with changes for 1, 3 and 4.  For 2, I'll add
comments explaining why it's okay.

Thanks.

-- 
tejun
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