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Wed, 03 Jun 2026 19:38:28 -0700 (PDT) Received: from intel.company.local ([210.184.73.204]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-36f6dba8573sm1253072a91.14.2026.06.03.19.38.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Jun 2026 19:38:28 -0700 (PDT) From: Wandun Chen To: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-rt-devel@lists.linux.dev Cc: akpm@linux-foundation.org, vbabka@kernel.org, surenb@google.com, mhocko@suse.com, jackmanb@google.com, hannes@cmpxchg.org, ziy@nvidia.com, rostedt@goodmis.org, mhiramat@kernel.org, mathieu.desnoyers@efficios.com, david@kernel.org, ljs@kernel.org, liam@infradead.org, rppt@kernel.org, bigeasy@linutronix.de, clrkwllms@kernel.org, Alexander.Krabler@kuka.com Subject: [RFC PATCH 0/3] mm/compaction: honour compact_unevictable_allowed in mlock race and alloc_contig path Date: Thu, 4 Jun 2026 10:38:09 +0800 Message-ID: <20260604023812.3700316-1-chenwandun1@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-rt-devel@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Wandun Chen vm.compact_unevictable_allowed=0 is meant to keep compaction from touching unevictable folios. In practice there are still two paths where it does not take effect. This series fixes them and adds a tracepoint to make such issues easier to diagnose in the future. Wandun Chen (3): mm/compaction: skip isolate mlocked folios when compact_unevictable_allowed=0 mm/compaction: add per-folio isolation tracepoint mm/compaction: respect compact_unevictable_allowed in alloc_contig path include/linux/compaction.h | 6 ++++++ include/trace/events/compaction.h | 26 ++++++++++++++++++++++++++ mm/compaction.c | 14 +++++++++++--- mm/internal.h | 1 + mm/page_alloc.c | 2 ++ 5 files changed, 46 insertions(+), 3 deletions(-) -- 2.43.0