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Mon, 15 Jun 2026 01:28:16 -0700 (PDT) Message-ID: <5d3d16f6-0654-483b-9625-94ab93d3d836@gmail.com> Date: Mon, 15 Jun 2026 16:28:07 +0800 Precedence: bulk X-Mailing-List: linux-rt-devel@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH 0/3] mm/compaction: honour compact_unevictable_allowed in mlock race and alloc_contig path From: Wandun To: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-rt-devel@lists.linux.dev, vbabka@kernel.org, bigeasy@linutronix.de, rostedt@goodmis.org, hughd@google.com Cc: akpm@linux-foundation.org, surenb@google.com, mhocko@suse.com, jackmanb@google.com, hannes@cmpxchg.org, ziy@nvidia.com, mhiramat@kernel.org, mathieu.desnoyers@efficios.com, david@kernel.org, ljs@kernel.org, liam@infradead.org, rppt@kernel.org, clrkwllms@kernel.org, Alexander.Krabler@kuka.com References: <20260604023812.3700316-1-chenwandun1@gmail.com> Content-Language: en-US In-Reply-To: <20260604023812.3700316-1-chenwandun1@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 6/4/26 10:38, Wandun Chen wrote: > 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. Gentle ping, any feedback on this series? Sashiko found a potential compilation error in patch2, I'll address that along with any review comments in v2. Best regards, Wandun > > 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(-) >