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

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Message-ID: <50BD5001.9000203@huawei.com>
Date:	Tue, 4 Dec 2012 09:21:05 +0800
From:	Jiang Liu <jiang.liu@...wei.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Chris Clayton <chris2553@...glemail.com>,
	Jiang Liu <liuj97@...il.com>,
	Wen Congyang <wency@...fujitsu.com>,
	David Rientjes <rientjes@...gle.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 2012-12-4 7:17, 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.

Hi Andrew,
	I think the story that,
1) I sent out all five patches for the first version.
2) Later updated and resend the first and forth patches according to 
   review comments without touching the other three patches.
	So you may just get the updated two without noticing the other
three from the initial patchset.
	Sorry for the trouble.
Regards!
Gerry

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