linux-kernel - Re: [PATCH 4/4] mm: numa: Do not mark PTEs pte

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Message-ID: <CA+55aFwybOYtuOn43idiikVDPfBO7pWb4vLjhcM0dYUxTx7odA@mail.gmail.com>
Date:	Thu, 2 Oct 2014 12:03:58 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Sasha Levin <sasha.levin@...cle.com>
Cc:	Mel Gorman <mgorman@...e.de>, Dave Jones <davej@...hat.com>,
	Hugh Dickins <hughd@...gle.com>,
	Al Viro <viro@...iv.linux.org.uk>,
	Rik van Riel <riel@...hat.com>,
	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Aneesh Kumar <aneesh.kumar@...ux.vnet.ibm.com>,
	Michel Lespinasse <walken@...gle.com>,
	Kirill A Shutemov <kirill.shutemov@...ux.intel.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 4/4] mm: numa: Do not mark PTEs pte_numa when splitting
 huge pages

On Thu, Oct 2, 2014 at 11:58 AM, Sasha Levin <sasha.levin@...cle.com> wrote:
>
> You've also mentioned that while I can tell you if nothing dies, I can't
> really tell you if everything is working well. Is there a reasonable way
> to easily say if NUMA is working properly? Even something that would just
> tell me "your NUMA balancing seems to be sane" would be good.

So not having a NUMA machine (and not really wanting one), I can't
really test things like the migration even *working*.

But the easy/obvious test would be to run the autonuma benchmarks, and
verify that the performance is where it's expected to be and that the
migration actually works.

I think the "main" source site is

  https://gitorious.org/autonuma-benchmark

but haven't verified.

             Linus
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