linux-kernel - Re: [PATCH 6/7] mm: memcontrol: move obj_cgroup_uncharge_pages() out of css_set

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Message-ID: <YHXc2HH/pkKwgYoz@cmpxchg.org>
Date:   Tue, 13 Apr 2021 14:03:04 -0400
From:   Johannes Weiner <hannes@...xchg.org>
To:     Muchun Song <songmuchun@...edance.com>
Cc:     guro@...com, mhocko@...nel.org, akpm@...ux-foundation.org,
        shakeelb@...gle.com, vdavydov.dev@...il.com,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        duanxiongchun@...edance.com, fam.zheng@...edance.com
Subject: Re: [PATCH 6/7] mm: memcontrol: move obj_cgroup_uncharge_pages() out
 of css_set_lock

On Tue, Apr 13, 2021 at 02:51:52PM +0800, Muchun Song wrote:
> The css_set_lock is used to guard the list of inherited objcgs. So there
> is no need to uncharge kernel memory under css_set_lock. Just move it
> out of the lock.
> 
> Signed-off-by: Muchun Song <songmuchun@...edance.com>

Acked-by: Johannes Weiner <hannes@...xchg.org>