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[96.255.20.138]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-4efd341f2absm109317821cf.17.2025.12.03.01.26.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Dec 2025 01:26:02 -0800 (PST) Date: Wed, 3 Dec 2025 04:26:01 -0500 From: Gregory Price To: "David Hildenbrand (Red Hat)" Cc: Michal Hocko , Andrew Morton , Aboorva Devarajan , vbabka@suse.cz, surenb@google.com, jackmanb@google.com, hannes@cmpxchg.org, ziy@nvidia.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Oscar Salvador , Juan Yescas Subject: Re: [PATCH] mm/page_alloc: make percpu_pagelist_high_fraction reads lock-free Message-ID: References: <20251201060009.1420792-1-aboorvad@linux.ibm.com> <20251201094112.07eb1e588b6da2ee70c4641d@linux-foundation.org> <47a8b4d5-f4d2-4772-b1b2-ee96bc21e742@kernel.org> <9de2f7e2-a202-499d-8858-6936beb251d9@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Queue-Id: 83D2CC0005 X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: p4ope7y3pezgf1gnfn7hu7ozuoctaa4y X-HE-Tag: 1764753965-329913 X-HE-Meta: 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 kQ70qb2H gZchk8p9iBj0oNdOqVejAfMPaAscOBSXRcsJOHeHzu4UFZZ7xxGhGVJJ88AURdMw5PcLbarIrLGycl8tQntzn8AYXjfxJrclOJiU9ZBaBY1P5WoLuxbvN4n8cLt6r0O0vEB3qDpLuOYxs5Oo6i1VDQ9NQFdeqM9sLDFwHl8M17X0f1UcgO4xo5NcS5xh2MItWTsyp/C0e40N6D277dM4Pe2PUk+uZN9YFSq7hMT8zMESOOatAtKvBg2HJ1wGugoK5M3NZYFuKxeHm9okNsyznpRA6YcS4WcqIeGfww+KqBfqmXn8pO1LiBvD2Sv78WUWXhcaazQYOGElFcvX1vclv1CGFbDscOJFjqoctuk/7cvOr83M874treeXJaQ== 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 Wed, Dec 03, 2025 at 04:23:20AM -0500, Gregory Price wrote: > What luck, I do! :D > And i just noticed it's the same page over and over > Should have noted: 6.13.2 but it's kind of a frankenstein's 6.13.2 with stable backports, so I don't know what's been fixed between 6.13 and latest. If there are relevant patches I can search for whether we have them. > [ 3404.119270] migrating pfn c06f176 failed ret:1 > [ 3404.129152] page: refcount:4 mapcount:0 mapping:0000000061ca20ba index:0xad28e5b pfn:0xc06f176 > [ 3404.148284] memcg:ffff88842e855000 > [ 3404.155834] aops:btree_aops ino:1 > [ 3404.163193] flags: 0x17ffff066c00420c(referenced|uptodate|workingset|private|node=1|zone=3|lastcpupid=0x1ffff) > [ 3404.185408] raw: 17ffff066c00420c ffffc90066a13ca0 ffffc90066a13ca0 ffff88812b8502f8 > [ 3404.202603] raw: 000000000ad28e5b ffff888859fd42d0 00000004ffffffff ffff88842e855000 > [ 3404.219779] page dumped because: migration failure > ~Gregory