From: "Michal Koutný" <mkoutny@suse.com>
To: Muchun Song <songmuchun@bytedance.com>
Cc: hannes@cmpxchg.org, mhocko@kernel.org, roman.gushchin@linux.dev,
shakeelb@google.com, akpm@linux-foundation.org,
cgroups@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, duanxiongchun@bytedance.com,
longman@redhat.com
Subject: Re: [PATCH v5 03/11] mm: memcontrol: prepare objcg API for non-kmem usage
Date: Wed, 1 Jun 2022 19:34:34 +0200 [thread overview]
Message-ID: <20220601173434.GB16134@blackbody.suse.cz> (raw)
In-Reply-To: <20220530074919.46352-4-songmuchun@bytedance.com>
Hello.
On Mon, May 30, 2022 at 03:49:11PM +0800, Muchun Song <songmuchun@bytedance.com> wrote:
> So we also allocate an object cgroup for the root_mem_cgroup.
This change made me wary that this patch also kmem charging in the
root_mem_cgroup. Fortunately, get_obj_cgroup_from_current won't return
this objcg so all is fine.
> +}
> +#else
> +static inline void obj_cgroup_release_bytes(struct obj_cgroup *objcg)
> +{
> +}
> +#endif
This empty body is for !CONFIG_MEMCG_KMEM, however, the subsequent use for LRU
pages makes no use of these, so it's warranted.
Altogether, I find this correct, hence
Reviewed-by: Michal Koutný <mkoutny@suse.com>
next prev parent reply other threads:[~2022-06-01 17:34 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-30 7:49 [PATCH v5 00/11] Use obj_cgroup APIs to charge the LRU pages Muchun Song
2022-05-30 7:49 ` [PATCH v5 01/11] mm: memcontrol: remove dead code and comments Muchun Song
2022-06-10 23:01 ` Roman Gushchin
2022-05-30 7:49 ` [PATCH v5 02/11] mm: rename unlock_page_lruvec{_irq, _irqrestore} to lruvec_unlock{_irq, _irqrestore} Muchun Song
2022-06-10 23:08 ` Roman Gushchin
2022-05-30 7:49 ` [PATCH v5 03/11] mm: memcontrol: prepare objcg API for non-kmem usage Muchun Song
2022-06-01 17:34 ` Michal Koutný [this message]
2022-06-01 18:33 ` Roman Gushchin
2022-06-02 10:48 ` Muchun Song
2022-06-02 3:06 ` Muchun Song
2022-06-10 23:13 ` Roman Gushchin
2022-05-30 7:49 ` [PATCH v5 04/11] mm: memcontrol: make lruvec lock safe when LRU pages are reparented Muchun Song
2022-05-30 7:49 ` [PATCH v5 05/11] mm: vmscan: rework move_pages_to_lru() Muchun Song
2022-05-30 7:49 ` [PATCH v5 06/11] mm: thp: make split queue lock safe when LRU pages are reparented Muchun Song
2022-05-30 7:49 ` [PATCH v5 07/11] mm: memcontrol: make all the callers of {folio,page}_memcg() safe Muchun Song
2022-06-19 19:37 ` Roman Gushchin
2022-06-20 6:13 ` Muchun Song
2022-05-30 7:49 ` [PATCH v5 08/11] mm: memcontrol: introduce memcg_reparent_ops Muchun Song
2022-06-19 19:47 ` Roman Gushchin
2022-06-20 7:14 ` Muchun Song
2022-05-30 7:49 ` [PATCH v5 09/11] mm: memcontrol: use obj_cgroup APIs to charge the LRU pages Muchun Song
2022-06-01 17:34 ` Michal Koutný
2022-06-02 4:14 ` Muchun Song
2022-06-19 20:32 ` Roman Gushchin
2022-05-30 7:49 ` [PATCH v5 10/11] mm: lru: add VM_BUG_ON_FOLIO to lru maintenance function Muchun Song
2022-06-19 19:49 ` Roman Gushchin
2022-05-30 7:49 ` [PATCH v5 11/11] mm: lru: use lruvec lock to serialize memcg changes Muchun Song
2022-05-30 21:17 ` [PATCH v5 00/11] Use obj_cgroup APIs to charge the LRU pages Andrew Morton
2022-05-31 2:26 ` Muchun Song
2022-05-31 2:46 ` Roman Gushchin
2022-05-31 2:41 ` Waiman Long
2022-05-31 7:29 ` Muchun Song
2022-06-09 2:43 ` Muchun Song
2022-06-09 2:53 ` Roman Gushchin
2022-06-09 3:09 ` Muchun Song
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