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From: Johannes Weiner <hannes@cmpxchg.org>
To: Muchun Song <songmuchun@bytedance.com>
Cc: guro@fb.com, mhocko@kernel.org, akpm@linux-foundation.org,
	shakeelb@google.com, vdavydov.dev@gmail.com,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	duanxiongchun@bytedance.com
Subject: Re: [PATCH v3 1/4] mm: memcontrol: introduce obj_cgroup_{un}charge_pages
Date: Thu, 11 Mar 2021 07:30:53 -0500	[thread overview]
Message-ID: <YEoNfYvbMHw4ifyc@cmpxchg.org> (raw)
In-Reply-To: <20210309100717.253-2-songmuchun@bytedance.com>

On Tue, Mar 09, 2021 at 06:07:14PM +0800, Muchun Song wrote:
> We know that the unit of slab object charging is bytes, the unit of
> kmem page charging is PAGE_SIZE. If we want to reuse obj_cgroup APIs
> to charge the kmem pages, we should pass PAGE_SIZE (as third parameter)
> to obj_cgroup_charge(). Because the size is already PAGE_SIZE, we can
> skip touch the objcg stock. And obj_cgroup_{un}charge_pages() are
> introduced to charge in units of page level.
> 
> In the later patch, we also can reuse those two helpers to charge or
> uncharge a number of kernel pages to a object cgroup. This is just
> a code movement without any functional changes.
> 
> Signed-off-by: Muchun Song <songmuchun@bytedance.com>
> Acked-by: Roman Gushchin <guro@fb.com>

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

  reply	other threads:[~2021-03-11 12:31 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-09 10:07 [PATCH v3 0/4] Use obj_cgroup APIs to charge kmem pages Muchun Song
2021-03-09 10:07 ` [PATCH v3 1/4] mm: memcontrol: introduce obj_cgroup_{un}charge_pages Muchun Song
2021-03-11 12:30   ` Johannes Weiner [this message]
2021-03-11 18:56   ` Shakeel Butt
2021-03-11 18:56     ` Shakeel Butt
2021-03-09 10:07 ` [PATCH v3 2/4] mm: memcontrol: make page_memcg{_rcu} only applicable for non-kmem page Muchun Song
2021-03-10 19:57   ` Roman Gushchin
2021-03-11  6:45     ` [External] " Muchun Song
2021-03-11  6:45       ` Muchun Song
2021-03-11 13:12   ` Johannes Weiner
2021-03-12  7:14     ` [External] " Muchun Song
2021-03-12  7:14       ` Muchun Song
2021-03-12 19:23       ` Johannes Weiner
2021-03-12 22:42         ` Shakeel Butt
2021-03-12 22:42           ` Shakeel Butt
2021-03-12 23:07           ` Johannes Weiner
2021-03-12 23:18             ` Shakeel Butt
2021-03-12 23:18               ` Shakeel Butt
2021-03-14 13:56         ` Muchun Song
2021-03-14 13:56           ` Muchun Song
2021-03-12  3:22   ` Shakeel Butt
2021-03-12  3:22     ` Shakeel Butt
2021-03-12  5:02     ` [External] " Muchun Song
2021-03-12  5:02       ` Muchun Song
2021-03-09 10:07 ` [PATCH v3 3/4] mm: memcontrol: use obj_cgroup APIs to charge kmem pages Muchun Song
2021-03-10 19:53   ` Roman Gushchin
2021-03-11  6:50     ` [External] " Muchun Song
2021-03-11  6:50       ` Muchun Song
2021-03-10 22:05   ` Johannes Weiner
2021-03-12  9:22     ` [External] " Muchun Song
2021-03-12  9:22       ` Muchun Song
2021-03-12 15:59       ` Johannes Weiner
2021-03-12 16:46         ` Muchun Song
2021-03-12 16:46           ` Muchun Song
2021-03-11 17:48   ` kernel test robot
2021-03-11 17:48     ` kernel test robot
2021-03-09 10:07 ` [PATCH v3 4/4] mm: memcontrol: move PageMemcgKmem to the scope of CONFIG_MEMCG_KMEM Muchun Song
2021-03-10 19:30   ` Roman Gushchin
2021-03-12  3:26   ` Shakeel Butt
2021-03-12  3:26     ` Shakeel Butt
2021-03-12 19:24   ` Johannes Weiner

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