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AJvYcCX5M7xwTGrYVIQivOGGZJ1+sNM/RpfhWJUymHxwRdWbrCtYTEYX+rgfgeXNCRVuC+GPqdK9L7F0ag==@kvack.org X-Gm-Message-State: AOJu0Yw+N1OlODVo72D1rzAUCucttQqVs6J37ZRtbz1fsW7GyyeThJZS xxrGYEmp2pK37G2cHJGFdjzyvwPGsPF/pNExylQdX+jru+D8mlqyqF0wnNw7ecOZIaBcvrkMOWB 1M8vaHF/NOD/S+VM+yEhKv76EKPNgkowBFoR4gwNl6ilxcRIRPaiP X-Gm-Gg: ASbGncufTQGwgRlYh1g5pymneAvF6vn51LXvWmNwBgHXjfa0T59j4GFSBJH3EPNzPcX rboHAX3Am4YY5E7eCl/f5iUiMZZwcxXY2dfCozk+xk4YqZlcVCxudq+lIxeLPbrCPxoJfNHu4HH bYyrm794tvnRhvkp1mkoW7Qaxt+yD8gVbVZ90xSlAMedUt5nX8YtEN X-Google-Smtp-Source: AGHT+IF/ulFm1u/wrb6Z9JTDyIIX9Z/3tWgVPN+WIa93aMZMmu/2Wv+vkID2acqsQOxCDG0EPTzY3Urz/Okit1V5ed4= X-Received: by 2002:a05:622a:2483:b0:477:c4f:ee58 with SMTP id d75a77b69052e-47d13ae65a9mr1911041cf.24.1745367734940; Tue, 22 Apr 2025 17:22:14 -0700 (PDT) MIME-Version: 1.0 References: <20250416082405.20988-1-zhangtianyang@loongson.cn> <025e3f51-2ab5-bc58-5475-b57103169a82@loongson.cn> <20250422171116.f3928045a13205dc1b9a46ea@linux-foundation.org> In-Reply-To: <20250422171116.f3928045a13205dc1b9a46ea@linux-foundation.org> From: Suren Baghdasaryan Date: Tue, 22 Apr 2025 17:22:04 -0700 X-Gm-Features: ATxdqUGzXCZA__JdB5Nad1t-pfokmHKYCm90-XSN8xWEAIqENK2Zsn9n3Tkt8lo Message-ID: Subject: Re: [PATCH] mm/page_alloc.c: Avoid infinite retries caused by cpuset race To: Andrew Morton Cc: Tianyang Zhang , Harry Yoo , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Vlastimil Babka , Michal Hocko , Brendan Jackman , Johannes Weiner , Zi Yan Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: E1BB11C000A X-Rspam-User: X-Rspamd-Server: rspam07 X-Stat-Signature: ykmkc9pb9ceq14pci5edhz49w86uw94w X-HE-Tag: 1745367735-292732 X-HE-Meta: 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 IlIGaTcn OEaVKXdm3EkC+nNaDcs6CwTVh3oHKNZ2066vimtgxbpGhmoTN6PZeY2m6APEywg00/t/w3hqyJO9U6DiT780VYxEO77wfCPfy7eC3wQrxWI/4YnklQAkCk/gEOLbifBxxBKseUBPmzvJ9XXd0nZnCKgFKZQNwcBFm5bofu4vVpDe0tlIbgChrksEsSZ8oGIXLsr3JTbmwh9SsVCpZQqorDDmViQb75njLDuNhy+mZGuk+cHvldHiYhJBAyTJiDQKsncfWHR1XfHnay+A/5Pr0eBEJ0u5Lr452N0lpHV1cdXJh0iL0Q5VGS8SlP7WD+udaWIENzGMxN8hTKDo= 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 Tue, Apr 22, 2025 at 5:11=E2=80=AFPM Andrew Morton wrote: > > On Tue, 22 Apr 2025 20:10:06 +0800 Tianyang Zhang wrote: > > > > > ... > > > > >> > > >> Simultaneously starting multiple cpuset01 from LTP can quickly > > >> reproduce this issue on a multi node server when the maximum > > >> memory pressure is reached and the swap is enabled > > >> > > >> Signed-off-by: Tianyang Zhang > > >> --- > > > What commit does it fix and should it be backported to -stable? > > > > > > There's a new 'MEMORY MANAGEMENT - PAGE ALLOCATOR' entry (only in > > > Andrew's mm.git repository now). > > > > > > Let's Cc the page allocator folks here! > > > > We first identified this issue in 6.6.52-stable , and through root caus= e > > analysis, > > > > it appears the problem may have existed for a significant period. > > > > However It is recommended that the fix should be backported to at least > > Linux kernel versions after 6.6-stable > > OK, thanks, > > This has been in mm-hotfixes-unstable for six days. Hopefully we'll > see some review activity soon (please). I reviewed and provided my feedback but saw neither a reply nor a respin with proposed changes. >