linux-kernel - Re: [PATCH 3/3] mm, memcg: inline swap-related functions to improve disabled memcg config

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CALvZod4bpiA-AB_5xLwcicEhRRQmk20b8dEmY_BiDjiGfFR0Nw@mail.gmail.com>
Date:   Fri, 9 Jul 2021 09:05:24 -0700
From:   Shakeel Butt <shakeelb@...gle.com>
To:     Suren Baghdasaryan <surenb@...gle.com>
Cc:     Tejun Heo <tj@...nel.org>, Johannes Weiner <hannes@...xchg.org>,
        Michal Hocko <mhocko@...nel.org>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Roman Gushchin <guro@...com>,
        Muchun Song <songmuchun@...edance.com>,
        Yang Shi <shy828301@...il.com>, alexs@...nel.org,
        Alexander Duyck <alexander.h.duyck@...ux.intel.com>,
        Wei Yang <richard.weiyang@...il.com>,
        Vlastimil Babka <vbabka@...e.cz>, Jens Axboe <axboe@...nel.dk>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        David Hildenbrand <david@...hat.com>,
        Matthew Wilcox <willy@...radead.org>,
        Alistair Popple <apopple@...dia.com>,
        Minchan Kim <minchan@...nel.org>,
        Miaohe Lin <linmiaohe@...wei.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Cgroups <cgroups@...r.kernel.org>, Linux MM <linux-mm@...ck.org>,
        kernel-team <kernel-team@...roid.com>
Subject: Re: [PATCH 3/3] mm, memcg: inline swap-related functions to improve
 disabled memcg config

On Thu, Jul 8, 2021 at 5:05 PM Suren Baghdasaryan <surenb@...gle.com> wrote:
>
> Inline mem_cgroup_try_charge_swap, mem_cgroup_uncharge_swap and
> cgroup_throttle_swaprate functions to perform mem_cgroup_disabled static
> key check inline before calling the main body of the function. This
> minimizes the memcg overhead in the pagefault and exit_mmap paths when
> memcgs are disabled using cgroup_disable=memory command-line option.
> This change results in ~1% overhead reduction when running PFT test
> comparing {CONFIG_MEMCG=n} against {CONFIG_MEMCG=y, cgroup_disable=memory}
> configuration on an 8-core ARM64 Android device.
>
> Signed-off-by: Suren Baghdasaryan <surenb@...gle.com>

Reviewed-by: Shakeel Butt <shakeelb@...gle.com>