linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
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?

  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)

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210804190055.b484ab15587cc891683eafea@linux-foundation.org \
    --to=akpm@linux-foundation.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=zhangkui@oppo.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).