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[34.125.132.248]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-34f45bf6f1dsm3187814a91.2.2026.01.04.21.08.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 04 Jan 2026 21:08:27 -0800 (PST) Date: Mon, 5 Jan 2026 05:08:22 +0000 From: Bing Jiao To: Andrew Morton Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, gourry@gourry.net, 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, david@kernel.org, zhengqi.arch@bytedance.com, lorenzo.stoakes@oracle.com, axelrasmussen@google.com, chenridong@huaweicloud.com, yuanchu@google.com, weixugc@google.com, cgroups@vger.kernel.org, Akinobu Mita Subject: Re: [PATCH v4] mm/vmscan: fix demotion targets checks in reclaim/demotion Message-ID: References: <20251223212032.665731-1-bingjiao@google.com> <20260104085439.4076810-1-bingjiao@google.com> <20260104102745.cfd4f6bd661e8e817afcdba8@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260104102745.cfd4f6bd661e8e817afcdba8@linux-foundation.org> X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: F306E20002 X-Stat-Signature: aqbr88z9abt58g4jepwko3bfhje659nm X-Rspam-User: X-HE-Tag: 1767589709-525092 X-HE-Meta: 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 nNx67mPC 9qfgViIk9jLbbO0W3VojR2zpwqYxdXnqGnXpfCsgq2GAs2KBnY4hcZtjIatpBpNePJ+4r6zeqdzu/PbQZKcXa2TpIHQ== 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: On Sun, Jan 04, 2026 at 10:27:45AM -0800, Andrew Morton wrote: > We'll want to fix these things in 6.16.X and later, but you've prepared > this patch against "mm/vmscan: don't demote if there is not enough free > memory in the lower memory tier", which is presently under test/review > in mm.git's mm-unstable branch. > > This seems to be incorrect ordering - this fix should go ahead of > Akinobu Mita's series "mm: fix oom-killer not being invoked when > demotion is enabled v2". > > So can you please redo this patch against current mainline? And please > also review the "mm: fix oom-killer not being invoked when demotion is > enabled" series to ensure that things will work together nicely when > that time comes. Hi Andrew, Thank you for the detailed explanation. Patch v4 has been sent. V4 is patched against the mainline. Tested on both the mainline and mm-everything (after Akinobu Mita's series "mm: fix oom-killer not being invoked when demotion is enabled v2"), and passed. Best, Bing