linux-kernel - Re: [PATCH 15/18] mm: memcontrol: make swap tracking an integral part of memory control

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Message-ID: <e9d58c82-d746-dcd0-d9e3-6322014a3b03@linux.alibaba.com>
Date:   Tue, 21 Apr 2020 17:27:30 +0800
From:   Alex Shi <alex.shi@...ux.alibaba.com>
To:     Johannes Weiner <hannes@...xchg.org>,
        Joonsoo Kim <js1304@...il.com>
Cc:     Shakeel Butt <shakeelb@...gle.com>,
        Hugh Dickins <hughd@...gle.com>,
        Michal Hocko <mhocko@...e.com>,
        "Kirill A. Shutemov" <kirill@...temov.name>,
        Roman Gushchin <guro@...com>, linux-mm@...ck.org,
        cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-team@...com
Subject: Re: [PATCH 15/18] mm: memcontrol: make swap tracking an integral part
 of memory control



在 2020/4/21 上午6:11, Johannes Weiner 写道:
> The swapaccount=0 boot option will continue to exist, and it will
> eliminate the page_counter overhead and hide the swap control files,
> but it won't disable swap slot ownership tracking.

May we add extra explanation for this change to user? and the default
memsw limitations?

> 
> This patch makes sure we always have the cgroup records at swapin
> time; the next patch will fix the actual bug by charging readahead
> swap pages at swapin time rather than at fault time.
> 
> Signed-off-by: Johannes Weiner <hannes@...xchg.org>