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[173.79.56.208]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-6f2c2b30c65sm18341956d6.51.2025.04.18.22.38.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 18 Apr 2025 22:38:27 -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 v3 0/2] vmscan: enforce mems_effective during demotion Date: Sat, 19 Apr 2025 01:38:22 -0400 Message-ID: <20250419053824.1601470-1-gourry@gourry.net> X-Mailer: git-send-email 2.49.0 MIME-Version: 1.0 X-Rspam-User: X-Rspamd-Queue-Id: 4D928C0004 X-Rspamd-Server: rspam04 X-Stat-Signature: 13whnzfq7ya6jjuyzutgcebzgmics4np X-HE-Tag: 1745041109-634161 X-HE-Meta: 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 qfRGeWcO tf3CIdTsu/qD+lHf8MPu9TGTr+XXEuncO/91TpVQirIzdbStKeu5X9hsis9uW0iQL9BTKJ3CTqJ8aWs85q7UHhySklHM1IN1zSNtNP4NVg8RurNB7pEGkwXHa9WQrFVrmBDaCszunHsXlEvJVABpHBSmc+LlAXgMHcweOpwwOZlJvSooMDtzlhRmtxMToN3/tBv5xO03dvg313Ns8hdTgoUP9DzQhd4XLmdgVuSfOz7L2Pd9fFGGKxOc/pUPJRTI2XmubLW9bdI66+Hsxmi96mAPPuE0kLuWIs5jw 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 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. v3: - remove cgroup indirection, call cpuset directly from memcontrol - put mem_cgroup_node_allowed in memcontrol.c to reduce cpuset.h include scope - return true if mems_effective is empty, and don't walk the parents as recommended by Waiman Long. 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 | 14 ++++--- include/linux/cpuset.h | 9 +++- include/linux/memcontrol.h | 6 +++ kernel/cgroup/cpuset.c | 25 ++++++++++- mm/memcontrol.c | 6 +++ mm/page_alloc.c | 4 +- mm/vmscan.c | 41 +++++++++++-------- 7 files changed, 78 insertions(+), 27 deletions(-)