linux-kernel - Re: [PATCH] sched,numa: document and fix numa_preferred

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Message-ID: <5582F944.6080204@redhat.com>
Date:	Thu, 18 Jun 2015 13:00:52 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
CC:	linux-kernel@...r.kernel.org, peterz@...radead.org,
	mingo@...nel.org, mgorman@...e.de
Subject: Re: [PATCH] sched,numa: document and fix numa_preferred_nid setting

On 06/18/2015 12:41 PM, Srikar Dronamraju wrote:
> * Rik van Riel <riel@...hat.com> [2015-06-18 12:06:49]:
> 
>>>>
>>>
>>> Overall this patch does seem to produce better results. However numa02
>>> gets affected -vely.
>>
>> OK, that is kind of expected.
>>
>> The way numa02 runs means that we are essentially guaranteed
>> that, on a two node system, both nodes end up in the numa_group's
>> active_mask.
>>
> 
> Just to add this was on a 4 node machine.

OK, so we are looking at two multi-threaded processes
on a 4 node system, and waiting for them to converge?

It may make sense to add my patch in with your patch
1/4 from last week, as well as the correct part of
your patch 4/4, and see how they all work together.
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