linux-kernel - Re: [PATCH RFC] mm/madvise: implement MADV

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Message-ID: <20190527142156.GE1658@dhcp22.suse.cz>
Date:   Mon, 27 May 2019 16:21:56 +0200
From:   Michal Hocko <mhocko@...nel.org>
To:     Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Tejun Heo <tj@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Roman Gushchin <guro@...com>, linux-api@...r.kernel.org
Subject: Re: [PATCH RFC] mm/madvise: implement MADV_STOCKPILE (kswapd from
 user space)

On Mon 27-05-19 16:12:23, Michal Hocko wrote:
> [Cc linux-api. Please always cc this list when proposing a new user
>  visible api. Keeping the rest of the email intact for reference]
> 
> On Mon 27-05-19 13:05:58, Konstantin Khlebnikov wrote:
[...]
> > This implements manual kswapd-style memory reclaim initiated by userspace.
> > It reclaims both physical memory and cgroup pages. It works in context of
> > task who calls syscall madvise thus cpu time is accounted correctly.

I do not follow. Does this mean that the madvise always reclaims from
the memcg the process is member of?
-- 
Michal Hocko
SUSE Labs