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[173.79.56.208]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-47e9ebeb870sm16091691cf.5.2025.04.24.13.28.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Apr 2025 13:28:09 -0700 (PDT) From: Gregory Price To: linux-mm@kvack.org Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-team@meta.com, longman@redhat.com, hannes@cmpxchg.org, mhocko@kernel.org, roman.gushchin@linux.dev, shakeel.butt@linux.dev, muchun.song@linux.dev, tj@kernel.org, mkoutny@suse.com, akpm@linux-foundation.org Subject: [PATCH v5 0/2] vmscan: enforce mems_effective during demotion Date: Thu, 24 Apr 2025 16:28:04 -0400 Message-ID: <20250424202806.52632-1-gourry@gourry.net> X-Mailer: git-send-email 2.49.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: D3C3518000B X-Stat-Signature: 855t9ny7ji77k97uh8w6i9t5dfotoj88 X-Rspam-User: X-HE-Tag: 1745526490-387288 X-HE-Meta: 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 cx7oqylg wB+V8Q/qadObLjzvKjZKBlgK7cw2DGYu2l1C9kjd5DfBK+4awG86oHwN+syBKvrnHJp7ysPTvT4sC0AoULD7hJilx2lhuy6RLNjzysM+LqoTCVC9vA89oWLxaFIVKrc16Zhaa2GFn77l/jbZV2bzB24rSgEOng9hFIC1noxNWrgrbzBGGbR7pHNjvJaF++AgXDqM2cOrEXRZcLCf7QGCRWepeTsakowko3koKEcgk6Np5a8bazJG2+1cNHEwcdazMfeoqgWCr0cqqGAiV0Y1Hy2sttaC2AvEUyS7T 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: List-Subscribe: List-Unsubscribe: Change reclaim to respect cpuset.mems_effective during demotion when possible. Presently, reclaim explicitly ignores cpuset.mems_effective when demoting, which may cause the cpuset settings to violated. Implement cpuset_node_allowed() to check the cpuset.mems_effective associated wih the mem_cgroup of the lruvec being scanned. This only applies to cgroup/cpuset v2, as cpuset exists in a different hierarchy than mem_cgroup in v1. This requires renaming the existing cpuset_node_allowed() to be cpuset_current_now_allowed() - which is more descriptive anyway - to implement the new cpuset_node_allowed() which takes a target cgroup. v5: - squash drop rcu_read_lock fixlet into second patch, - changelog fixups --- (apologies for the spam, did not drop a reply-to) Gregory Price (2): cpuset: rename cpuset_node_allowed to cpuset_current_node_allowed vmscan,cgroup: apply mems_effective to reclaim .../ABI/testing/sysfs-kernel-mm-numa | 16 +++++--- include/linux/cpuset.h | 9 +++- include/linux/memcontrol.h | 6 +++ kernel/cgroup/cpuset.c | 40 +++++++++++++++++- mm/memcontrol.c | 6 +++ mm/page_alloc.c | 4 +- mm/vmscan.c | 41 +++++++++++-------- 7 files changed, 94 insertions(+), 28 deletions(-) -- 2.49.0