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Date: Wed, 4 Aug 2021 19:04:02 -0700 From: Andrew Morton <akpm@...ux-foundation.org> To: zhangkui <zhangkui@...o.com> Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org, linux-man@...r.kernel.org Subject: Re: [PATCH] mm/madvise: add MADV_WILLNEED to process_madvise() On Wed, 4 Aug 2021 16:20:10 +0800 zhangkui <zhangkui@...o.com> 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. This will require a small update to the process_madvise(2) manpage. Can you please send a patch?
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