linux-kernel - Re: [PATCH] mm: memcontrol: add the mempolicy interface for cgroup v2.

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Message-ID: <Yoy3wDh0cvziWGHJ@dhcp22.suse.cz>
Date:   Tue, 24 May 2022 12:47:28 +0200
From:   Michal Hocko <mhocko@...e.com>
To:     hezhongkun <hezhongkun.hzk@...edance.com>
Cc:     hannes@...xchg.org, roman.gushchin@...ux.dev,
        linux-kernel@...r.kernel.org, cgroups@...r.kernel.org,
        linux-mm@...ck.org, lizefan.x@...edance.com
Subject: Re: [PATCH] mm: memcontrol: add the mempolicy interface for cgroup
 v2.

On Tue 24-05-22 18:36:38, hezhongkun wrote:
> From: Hezhongkun <hezhongkun.hzk@...edance.com>
> 
> Mempolicy is difficult to use because it is set in-process
> via a system call. We want to make it easier to use mempolicy
> in cgroups, so that we can control low-priority cgroups to
> allocate memory in specified nodes. So this patch want to
> adds the mempolicy interface.
> 
> the mempolicy priority of memcgroup is higher than the priority
> of task. The order of getting the policy is,
> memcgroup->policy,task->policy or vma policy, default policy.
> memcgroup's policy is owned by itself, so descendants will
> not inherit it.

Why cannot you use cpuset cgroup?
-- 
Michal Hocko
SUSE Labs