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b=Ary3czBUrY5BcdJ3bPJlEhOFr7Qcw04lGjDc9MQsKZGy5g1+Dp/Ez09GzJmArhggm tleNdg56kmZuj3eGJ2O5/pzrHjYhaBICFkjn6pHDMqP6q/UTcyS025e43edF6cH+uM f1gXic3Gx44bPepct+tpNB7qDbE6hHVN1WUd9CQPkYrOIw0igHwe0CY3qxyTWTk2Ut I+iqjyhG3QRvZFTD9Ns0Pxuc1yjYyz27HY0UBeT3Spwl8jYgid3Ad/kFtEO/X/oz+c qKMkS7odNKVVb0eJew/2nh7nPJgDR6oyrQpWvgolblZHNv0Y0nGb6yJqYOzWnEZsqE 0B5Q6JJuonTJQ== Date: Wed, 8 Jul 2026 07:35:29 +0100 From: Lorenzo Stoakes To: Wandun Chen Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-rt-devel@lists.linux.dev, 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, liam@infradead.org, rppt@kernel.org, bigeasy@linutronix.de, clrkwllms@kernel.org, Alexander.Krabler@kuka.com Subject: Re: [RFC PATCH 0/3] mm/compaction: honour compact_unevictable_allowed in mlock race and alloc_contig path Message-ID: References: <20260604023812.3700316-1-chenwandun1@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Stat-Signature: 3n9benagqa14d198e8rgdq11oywaru6r X-Rspamd-Queue-Id: 6B298A0008 X-Rspam-User: X-Rspamd-Server: rspam07 X-HE-Tag: 1783492543-913319 X-HE-Meta: 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 lz6I2Ibm so0rmQvvo+HhabIHaeYJ8Hi5ic27y2OJOFf1q1IK15Y+FQcApgtQhy+7mLtUoLl+u+8UZh2slqg0fQxyr9fK814abufXWDQE/vDq8Bvy/EixhEyVO1eQwLJAgUHHaBbJYdSbnb6uqMigGmHitaL3MwShOkGTe02hkqnj4Sqha7ALwrUIoU+ge5d9+PCeyyouLPhWDNUwxLGtiZS7oDLZms0ZPMFiYfNBiftaq25NpwnbLtt2fij0OjSYo1GYqJwUrNdmzv9/O4erWgVNxgMRAuxzoky8/KHp9EZtdWPhjSUJ+BntNFAUnB307c7N0VXJtKMT4gUPpIouz3Zq44l4VtjKgA4yN1HVIAJEc/HV2SP/RNBsxQQaL+Z/HnNr1BiSLV/5gxzxGZvYr8bdb4+kCwH02xm7a9oDbgzTG8sLjVdxwgm5eU2sobgCc72foBAfvzZi3UWmOZ2mXPEtYUX65WhErD453RXq5h55+2WRToR5YF2A= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, Jul 08, 2026 at 07:31:26AM +0100, Lorenzo Stoakes wrote: > Errr... how does this relate to your other, non-RFC patch series [0] "mm: honour > compact_unevictable_allowed in mlock and CMA paths"? > > Why did you send this separately and why do you not mention the other series > here or there? > > And why is one RFC and the other not? > > You really need to add more context like this, I spent quite a bit of time > reviewing [0] and don't want to find out that actually you are abandoning that > for this or something?... Oh hang on... this is old, and [0] is new, my bad. It just got pinged up my mail client because of recent replies :>) Thanks, Lorenzo > > On Thu, Jun 04, 2026 at 10:38:09AM +0800, 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. > > > > 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 > > > > Thanks, Lorenzo > > [0]:https://lore.kernel.org/all/20260707125925.3725177-1-chenwandun1@gmail.com/