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

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Date:	Mon, 03 Dec 2012 07:26:17 +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 12/02/12 19:55, Chris Clayton 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.
>

I should have said, of course, that it was -rc6 and earlier that would 
not boot without Jiang Liu's patches. I applied those patches to rc-6 
and my resume after suspend to disk problem was fixed. For a subsequent 
week I have been running with the patches applied to -rc7, with Andrew's 
patch also applied for the last 3 days. -rc7 was not subject to the 
resume problem because the patch which broke it had been reverted.
All this has been on a 64bit laptop, but running a 32bit kernel with 
HIGHMEM.

Apologies for yesterday's inaccuracy. I shouldn't send testing reports 
when I'm in a hurry.

>  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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