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Mon, 19 Apr 2021 08:21:52 -0700 (PDT) Received: from llong.remote.csb ([2601:191:8500:76c0::cdbc]) by smtp.gmail.com with ESMTPSA id n136sm9882372qka.133.2021.04.19.08.21.51 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 19 Apr 2021 08:21:52 -0700 (PDT) From: Waiman Long X-Google-Original-From: Waiman Long Subject: Re: [PATCH v4 1/5] mm/memcg: Move mod_objcg_state() to memcontrol.c To: Johannes Weiner Cc: Michal Hocko , Vladimir Davydov , Andrew Morton , Tejun Heo , Christoph Lameter , Pekka Enberg , David Rientjes , Joonsoo Kim , Vlastimil Babka , Roman Gushchin , linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, linux-mm@kvack.org, Shakeel Butt , Muchun Song , Alex Shi , Chris Down , Yafang Shao , Wei Yang , Masayoshi Mizuma , Xing Zhengjun , Matthew Wilcox References: <20210419000032.5432-1-longman@redhat.com> <20210419000032.5432-2-longman@redhat.com> Message-ID: Date: Mon, 19 Apr 2021 11:21:50 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.9.0 MIME-Version: 1.0 In-Reply-To: Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=llong@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 030B5C0007DF X-Stat-Signature: wwxihr353oh5zu4i9qp87tes84rhkc4o Received-SPF: none (redhat.com>: No applicable sender policy available) receiver=imf06; identity=mailfrom; envelope-from=""; helo=us-smtp-delivery-124.mimecast.com; client-ip=170.10.133.124 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1618845717-882000 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 4/19/21 11:14 AM, Johannes Weiner wrote: > On Sun, Apr 18, 2021 at 08:00:28PM -0400, Waiman Long wrote: >> The mod_objcg_state() function is moved from mm/slab.h to mm/memcontrol.c >> so that further optimization can be done to it in later patches without >> exposing unnecessary details to other mm components. >> >> Signed-off-by: Waiman Long >> --- >> mm/memcontrol.c | 13 +++++++++++++ >> mm/slab.h | 16 ++-------------- >> 2 files changed, 15 insertions(+), 14 deletions(-) >> >> diff --git a/mm/memcontrol.c b/mm/memcontrol.c >> index e064ac0d850a..dc9032f28f2e 100644 >> --- a/mm/memcontrol.c >> +++ b/mm/memcontrol.c >> @@ -3150,6 +3150,19 @@ void __memcg_kmem_uncharge_page(struct page *page, int order) >> css_put(&memcg->css); >> } >> >> +void mod_objcg_state(struct obj_cgroup *objcg, struct pglist_data *pgdat, >> + enum node_stat_item idx, int nr) >> +{ >> + struct mem_cgroup *memcg; >> + struct lruvec *lruvec = NULL; >> + >> + rcu_read_lock(); >> + memcg = obj_cgroup_memcg(objcg); >> + lruvec = mem_cgroup_lruvec(memcg, pgdat); >> + mod_memcg_lruvec_state(lruvec, idx, nr); >> + rcu_read_unlock(); >> +} > It would be more naturally placed next to the others, e.g. below > __mod_lruvec_kmem_state(). > > But no deal breaker if there isn't another revision. > > Acked-by: Johannes Weiner > Yes, there will be another revision by rebasing patch series on the linux-next. I will move the function then. Cheers, Longman