From: Andrew Morton <akpm@linux-foundation.org>
To: zhangkui <zhangkui@oppo.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm/madvise: add MADV_WILLNEED to process_madvise()
Date: Wed, 4 Aug 2021 19:00:55 -0700 [thread overview]
Message-ID: <20210804190055.b484ab15587cc891683eafea@linux-foundation.org> (raw)
In-Reply-To: <20210804082010.12482-1-zhangkui@oppo.com>
On Wed, 4 Aug 2021 16:20:10 +0800 zhangkui <zhangkui@oppo.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.
>
What is SMS?
next prev parent reply other threads:[~2021-08-05 2:01 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-04 8:20 [PATCH] mm/madvise: add MADV_WILLNEED to process_madvise() zhangkui
2021-08-04 19:08 ` David Hildenbrand
2021-08-05 2:00 ` Andrew Morton [this message]
2021-08-05 2:58 ` 张魁(Kyler)
2021-08-05 2:04 ` Andrew Morton
2021-08-05 4:50 ` 张魁(Kyler)
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