All of lore.kernel.org
 help / color / mirror / Atom feed
From: Andrew Morton <akpm@linux-foundation.org>
To: Minchan Kim <minchan@kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
	linux-mm <linux-mm@kvack.org>,
	linux-api@vger.kernel.org, oleksandr@redhat.com,
	Suren Baghdasaryan <surenb@google.com>,
	Tim Murray <timmurray@google.com>,
	Daniel Colascione <dancol@google.com>,
	Sandeep Patil <sspatil@google.com>,
	Sonny Rao <sonnyrao@google.com>,
	Brian Geffon <bgeffon@google.com>, Michal Hocko <mhocko@suse.com>,
	Johannes Weiner <hannes@cmpxchg.org>,
	Shakeel Butt <shakeelb@google.com>,
	John Dias <joaodias@google.com>,
	Joel Fernandes <joel@joelfernandes.org>,
	Jann Horn <jannh@google.com>,
	alexander.h.duyck@linux.intel.com, sj38.park@gmail.com
Subject: Re: [PATCH v7 0/7] introduce memory hinting API for external process
Date: Mon, 2 Mar 2020 13:16:18 -0800	[thread overview]
Message-ID: <20200302131618.b0f9f0e76d53a69184321884@linux-foundation.org> (raw)
In-Reply-To: <20200302193630.68771-1-minchan@kernel.org>

On Mon,  2 Mar 2020 11:36:23 -0800 Minchan Kim <minchan@kernel.org> wrote:

> Now, we have MADV_PAGEOUT and MADV_COLD as madvise hinting API. With that,
> application could give hints to kernel what memory range are preferred to be
> reclaimed. However, in some platform(e.g., Android), the information
> required to make the hinting decision is not known to the app.
> Instead, it is known to a centralized userspace daemon(e.g., ActivityManagerService),
> and that daemon must be able to initiate reclaim on its own without any app
> involvement.
> 
> To solve the concern, this patch introduces new syscall - process_madvise(2).
> Bascially, it's same with madvise(2) syscall but it has some differences.
> 
> 1. It needs pidfd of target process to provide the hint
> 2. It supports only MADV_{COLD|PAGEOUT|MERGEABLE|UNMEREABLE} at this moment.
>    Other hints in madvise will be opened when there are explicit requests from
>    community to prevent unexpected bugs we couldn't support.
> 3. Only privileged processes can do something for other process's address
>    space.
> 
> For more detail of the new API, please see "mm: introduce external memory hinting API"
> description in this patchset.

Thanks, I grabbed these.

I massaged the patch titles significantly - mainly to alert readers to
the fact that we're proposing a new syscall.

Is a manpage for process_madvise(2) being prepared?

  parent reply	other threads:[~2020-03-02 21:16 UTC|newest]

Thread overview: 49+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-02 19:36 [PATCH v7 0/7] introduce memory hinting API for external process Minchan Kim
2020-03-02 19:36 ` [PATCH v7 1/7] mm: pass task and mm to do_madvise Minchan Kim
2020-03-05 15:48   ` Vlastimil Babka
2020-05-08 18:21     ` Minchan Kim
2020-03-02 19:36 ` [PATCH v7 2/7] mm: introduce external memory hinting API Minchan Kim
2020-03-03 10:33   ` kbuild test robot
2020-03-03 10:33     ` kbuild test robot
2020-03-03 14:57     ` Minchan Kim
2020-03-03 14:57       ` Minchan Kim
2020-03-05 18:15   ` Vlastimil Babka
2020-03-10 22:20     ` Minchan Kim
2020-03-11  0:36       ` Minchan Kim
2020-03-12 12:40       ` Vlastimil Babka
2020-03-12 20:23         ` Minchan Kim
2020-05-08 18:33           ` Minchan Kim
2020-03-02 19:36 ` [PATCH v7 3/7] mm: check fatal signal pending of target process Minchan Kim
2020-03-06 10:22   ` Vlastimil Babka
2020-03-10 22:24     ` Minchan Kim
2020-03-02 19:36 ` [PATCH v7 4/7] pid: move pidfd_get_pid function to pid.c Minchan Kim
2020-03-06 10:57   ` Vlastimil Babka
2020-03-06 11:14   ` Christian Brauner
2020-03-02 19:36 ` [PATCH v7 5/7] mm: support both pid and pidfd for process_madvise Minchan Kim
2020-03-06 11:14   ` Vlastimil Babka
2020-03-11  0:42     ` Minchan Kim
2020-05-08 18:36       ` Minchan Kim
2020-05-08 23:04         ` Andrew Morton
2020-05-09 12:48           ` Christian Brauner
2020-05-09 23:14             ` Minchan Kim
2020-05-12 19:55               ` Suren Baghdasaryan
2020-05-12 19:55                 ` Suren Baghdasaryan
2020-03-02 19:36 ` [PATCH v7 6/7] mm/madvise: employ mmget_still_valid for write lock Minchan Kim
2020-03-06 12:52   ` Vlastimil Babka
2020-03-06 13:03     ` Oleksandr Natalenko
2020-03-06 16:03       ` Vlastimil Babka
2020-03-09 12:30         ` Oleksandr Natalenko
2020-03-10 22:28           ` Minchan Kim
2020-03-02 19:36 ` [PATCH v7 7/7] mm/madvise: allow KSM hints for remote API Minchan Kim
2020-03-06 13:13   ` Vlastimil Babka
2020-03-06 13:41     ` Oleksandr Natalenko
2020-03-06 16:08       ` Vlastimil Babka
2020-03-09 13:11         ` Oleksandr Natalenko
2020-03-09 15:08           ` Michal Hocko
2020-03-09 15:19             ` Oleksandr Natalenko
2020-03-09 15:42               ` Vlastimil Babka
2020-03-09 16:03                 ` Michal Hocko
2020-06-11  2:21   ` Jann Horn
2020-06-11  2:21     ` Jann Horn
2020-03-02 21:16 ` Andrew Morton [this message]
2020-03-02 21:42   ` [PATCH v7 0/7] introduce memory hinting API for external process Minchan Kim

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=20200302131618.b0f9f0e76d53a69184321884@linux-foundation.org \
    --to=akpm@linux-foundation.org \
    --cc=alexander.h.duyck@linux.intel.com \
    --cc=bgeffon@google.com \
    --cc=dancol@google.com \
    --cc=hannes@cmpxchg.org \
    --cc=jannh@google.com \
    --cc=joaodias@google.com \
    --cc=joel@joelfernandes.org \
    --cc=linux-api@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=mhocko@suse.com \
    --cc=minchan@kernel.org \
    --cc=oleksandr@redhat.com \
    --cc=shakeelb@google.com \
    --cc=sj38.park@gmail.com \
    --cc=sonnyrao@google.com \
    --cc=sspatil@google.com \
    --cc=surenb@google.com \
    --cc=timmurray@google.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.