linux-kernel - Re: [RFT PATCH v2 4/5] mm: provide more accurate estimation of pages occupied by memmap

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Date:	Sun, 02 Dec 2012 19:55:09 +0000
From:	Chris Clayton <chris2553@...glemail.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Jiang Liu <liuj97@...il.com>, Wen Congyang <wency@...fujitsu.com>,
	David Rientjes <rientjes@...gle.com>,
	Jiang Liu <jiang.liu@...wei.com>,
	Maciej Rutecki <maciej.rutecki@...il.com>,
	"Rafael J . Wysocki" <rjw@...k.pl>, Mel Gorman <mgorman@...e.de>,
	Minchan Kim <minchan@...nel.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Michal Hocko <mhocko@...e.cz>,
	Jianguo Wu <wujianguo@...wei.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [RFT PATCH v2 4/5] mm: provide more accurate estimation of pages
 occupied by memmap



On 11/29/12 10:52, Chris Clayton wrote:
> On 11/28/12 23:52, Andrew Morton wrote:
>> On Wed, 21 Nov 2012 23:09:46 +0800
>> Jiang Liu <liuj97@...il.com> wrote:
>>
>>> Subject: Re: [RFT PATCH v2 4/5] mm: provide more accurate estimation
>>> of pages occupied by memmap
>>
>> How are people to test this?  "does it boot"?
>>
>
> I've been running kernels with Gerry's 5 patches applied for 11 days
> now. This is on a 64bit laptop but with a 32bit kernel + HIGHMEM. I
> joined the conversation because my laptop would not resume from suspend
> to disk - it either froze or rebooted. With the patches applied the
> laptop does successfully resume and has been stable.
>
> Since Monday, I have have been running a kernel with the patches (plus,
> from today, the patch you mailed yesterday) applied to 3.7rc7, without
> problems.
>

I've been running 3.7-rc7 with the patches listed below for a week now 
and it has been perfectly stable. In particular, my laptop will now 
successfully resume from suspend to disk, which always failed without 
the patches.

 From Jiang Liu:
1. [RFT PATCH v2 1/5] mm: introduce new field "managed_pages" to struct zone
2. [RFT PATCH v1 2/5] mm: replace zone->present_pages with 
zone->managed_pages if appreciated
3. [RFT PATCH v1 3/5] mm: set zone->present_pages to number of existing 
pages in the zone
4. [RFT PATCH v2 4/5] mm: provide more accurate estimation of pages 
occupied by memmap
5. [RFT PATCH v1 5/5] mm: increase totalram_pages when free pages 
allocated by bootmem allocator

 From Andrew Morton:
6. mm-provide-more-accurate-estimation-of-pages-occupied-by-memmap.patch

Tested-by: Chris Clayton <chris2553@...glemail.com>

> Thanks,
> Chris
>
>
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