Re: [PATCH] mm/madvise: add MADV_WILLNEED to process_madvise()

From: 张魁(Kyler)
Date: Wed Aug 04 2021 - 22:59:06 EST

在 8/5/2021 10:00, Andrew Morton 写道:
> On Wed, 4 Aug 2021 16:20:10 +0800 zhangkui <zhangkui@xxxxxxxx> wrote:
>> There is a usecase in Android that an app process's memory is swapped out
>> by process_madvise() with MADV_PAGEOUT, such as the memory is swapped to
>> zram or a backing device. When the process is scheduled to running, like
>> switch to foreground, multiple page faults may cause the app dropped
>> frames.
>> To reduce the problem, SMS can read-ahead memory of the process immediately
>> when the app switches to forground.
>> Calling process_madvise() with MADV_WILLNEED can meet this need.
> What is SMS?
SMS is the abbreviation of System Management Software.
For more information, please refer to the commit


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