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From: Shakeel Butt To: Qi Zheng Cc: hannes@cmpxchg.org, hughd@google.com, mhocko@suse.com, roman.gushchin@linux.dev, muchun.song@linux.dev, david@kernel.org, lorenzo.stoakes@oracle.com, ziy@nvidia.com, harry.yoo@oracle.com, yosry.ahmed@linux.dev, imran.f.khan@oracle.com, kamalesh.babulal@oracle.com, axelrasmussen@google.com, yuanchu@google.com, weixugc@google.com, chenridong@huaweicloud.com, mkoutny@suse.com, akpm@linux-foundation.org, hamzamahfooz@linux.microsoft.com, apais@linux.microsoft.com, lance.yang@linux.dev, bhe@redhat.com, usamaarif642@gmail.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, Qi Zheng Subject: Re: [PATCH v5 update 30/32] mm: memcontrol: convert objcg to be per-memcg per-node type Message-ID: References: <0f915487ffc653cf6ea19335c21c01aa06004641.1772005110.git.zhengqi.arch@bytedance.com> <20260225094456.74145-1-qi.zheng@linux.dev> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260225094456.74145-1-qi.zheng@linux.dev> X-Migadu-Flow: FLOW_OUT X-HE-Meta: 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 X-HE-Tag-Orig: 1772136379-465799 X-Rspamd-Queue-Id: AAE03180005 X-Rspamd-Server: rspam02 X-Stat-Signature: inhxyfxugkhirkqnqmyq6uqwi9qcth3f X-Rspam-User: X-HE-Tag: 1772136381-462042 X-HE-Meta: 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, Feb 25, 2026 at 05:44:56PM +0800, Qi Zheng wrote: > From: Qi Zheng > > Convert objcg to be per-memcg per-node type, so that when reparent LRU > folios later, we can hold the lru lock at the node level, thus avoiding > holding too many lru locks at once. > > Signed-off-by: Qi Zheng > --- > changlog: > - fix a missing root_obj_cgroup conversion and completely delete > root_obj_cgroup. > After this patch, do we care that page/folio/slab points to the objcg of the same node as them for a given memcg?