linux-kernel - Re: [PATCH 2/2] mm: support MIGRATE

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Date:	Sat, 8 Sep 2012 09:16:43 +0900
From:	Minchan Kim <minchan@...nel.org>
To:	Mel Gorman <mgorman@...e.de>
Cc:	Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Michal Nazarewicz <mina86@...a86.com>,
	Rik van Riel <riel@...hat.com>
Subject: Re: [PATCH 2/2] mm: support MIGRATE_DISCARD

On Fri, Sep 07, 2012 at 10:32:03AM +0100, Mel Gorman wrote:
> On Fri, Sep 07, 2012 at 09:21:45AM +0100, Mel Gorman wrote:
> > 
> > So other than the mix up of order parameters I think this should work.
> > 
> 
> But I'd be wrong, isolated page accounting is not fixed up so it will
> eventually hang on too_many_isolated. It turns out it is necessary

Good spot.

> to pass in zone after all. The following patch passed a high order
> allocation stress test. To actually exercise the path I had compaction
> call reclaim_clean_pages_from_list() in a separate debugging patch.
> 
> Minchan, can you test your CMA allocation latency test with this patch?
> If the figures are satisfactory could you add them to the changelog and
> consider replacing the MIGRATE_DISCARD pair of patches with this version
> please?

Of course, I will do next week.
Thanks!

--
Kind Regards,
Minchan Kim
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