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

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Date:	Tue, 04 Dec 2012 10:05:50 +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 12/03/12 23:17, Andrew Morton wrote:
> On Sun, 02 Dec 2012 19:55:09 +0000
> Chris Clayton <chris2553@...glemail.com> wrote:
>
>>
>>
>> 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.
>
> I have only two of these five patches queued for 3.8:
> mm-introduce-new-field-managed_pages-to-struct-zone.patch and
> mm-provide-more-accurate-estimation-of-pages-occupied-by-memmap.patch.
> I don't recall what happened with the other three.
>

Gerry posted version 1 of the five patches on 18 November. Version 2 of 
the first and fourth patches were posted on 21 November.

BTW, the title of Andrew's patch that I applied is wrong above. It 
should be 
mm-provide-more-accurate-estimation-of-pages-occupied-by-memmap-fix.

Chris


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