linux-kernel - Re: [PATCH] android: lmk: add swap pte pmd in tasksize

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Date:	Fri, 11 Mar 2016 17:05:45 +0800
From:	Chen Feng <puck.chen@...ilicon.com>
To:	yalin wang <yalin.wang2010@...il.com>,
	Lu Bing <albert.lubing@...ilicon.com>
CC:	<gregkh@...uxfoundation.org>, <arve@...roid.com>,
	<riandrews@...roid.com>, <devel@...verdev.osuosl.org>,
	<linux-kernel@...r.kernel.org>, <kirill.shutemov@...ux.intel.com>,
	<suzhuangluan@...ilicon.com>, <yudongbin@...ilicon.com>,
	<xuyiping@...ilicon.com>, <chenxiang9@...wei.com>,
	<oliver.fu@...ilicon.com>, <liuzixing@...wei.com>,
	<shimingxing@...ilicon.com>, <alan.wei@...ilicon.com>,
	<saberlily.xia@...ilicon.com>, <dan.zhao@...ilicon.com>,
	<linuxarm@...wei.com>
Subject: Re: [PATCH] android: lmk: add swap pte pmd in tasksize



On 2016/3/11 15:30, yalin wang wrote:
> 
>> On Mar 11, 2016, at 15:23, Lu Bing <albert.lubing@...ilicon.com> wrote:
>>
>> From: l00215322 <albert.lubing@...ilicon.com>
>>
>> Many android devices have zram,so we should add "MM_SWAPENTS" in tasksize.
>> Refer oom_kill.c,we add pte&pmd also.
>>
>> Reviewed-by: Chen Feng <puck.chen@...ilicon.com>
>> Reviewed-by: Fu Jun <oliver.fu@...ilicon.com>
>> Reviewed-by: Xu YiPing <xuyiping@...ilicon.com>
>> Reviewed-by: Yu DongBin <yudongbin@...ilicon.com>
>> Signed-off-by: Lu Bing <albert.lubing@...ilicon.com>
>> ---
>> drivers/staging/android/lowmemorykiller.c | 4 +++-
>> 1 file changed, 3 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/staging/android/lowmemorykiller.c b/drivers/staging/android/lowmemorykiller.c
>> index 8b5a4a8..0817d3b 100644
>> --- a/drivers/staging/android/lowmemorykiller.c
>> +++ b/drivers/staging/android/lowmemorykiller.c
>> @@ -139,7 +139,9 @@ static unsigned long lowmem_scan(struct shrinker *s, struct shrink_control *sc)
>> 			task_unlock(p);
>> 			continue;
>> 		}
>> -		tasksize = get_mm_rss(p->mm);
>> +		tasksize = get_mm_rss(p->mm) +
>> +			get_mm_counter(p->mm, MM_SWAPENTS) +
>> +			atomic_long_read(&p->mm->nr_ptes) + mm_nr_pmds(p->mm);
> why not introduce a mm_nr_ptes()  help function here ?
> more clear to see .
> 
Since the code is in staging, we can add another patch to do this.


>> 		task_unlock(p);
>> 		if (tasksize <= 0)
>> 			continue;
>> -- 
>> 1.8.3.2
>>
> 
> 
> .
>