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Tue, 23 Jan 2024 10:05:14 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id CuWXElqPr2WJEQAAD6G6ig (envelope-from ); Tue, 23 Jan 2024 10:05:14 +0000 Date: Tue, 23 Jan 2024 11:05:13 +0100 From: Michal Hocko To: Joakim Tjernlund Cc: "gregkh@linuxfoundation.org" , "david@redhat.com" , "akpm@linux-foundation.org" , "linux-mm@kvack.org" , "hannes@cmpxchg.org" , "mgorman@techsingularity.net" , "linux-kernel@vger.kernel.org" , "quic_pkondeti@quicinc.com" , "vbabka@suse.cz" , "quic_charante@quicinc.com" , "stable@vger.kernel.org" , "quic_cgoldswo@quicinc.com" Subject: Re: [RESEND PATCH V2] mm: page_alloc: unreserve highatomic page blocks before oom Message-ID: References: <1700823445-27531-1-git-send-email-quic_charante@quicinc.com> <3fe3b3edd33cd784071dd9b459d20a79605ec918.camel@infinera.com> <2024012205-undrilled-those-2435@gregkh> <2024012210-outshoot-dragonish-fe8e@gregkh> <01010dd280badd149291cf4d2a4a88847113cf6d.camel@infinera.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <01010dd280badd149291cf4d2a4a88847113cf6d.camel@infinera.com> X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 6D2D3C0007 X-Stat-Signature: 3yuzjotjbkwtau8xajkuc3uxdugugskc X-Rspam-User: X-HE-Tag: 1706004316-426210 X-HE-Meta: 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 TKfUATNW +iTuP/tHNCiRknlDpggXWuQQLxgzndJk/dJRNHHsMaYuW1JqyoYxaKRHKCu8U5Ikq7sir1AHuNOHNdhUhsFFDRSs/gZPFjl+KjNyKn5jUt15QBYnc9cciUKKXsK3l0PG/mWjlYgn5HJ5NByBTHdZshTwQ/5KHNwWvJ8g0Gpxf8IfkLd+HcIgiPnK2krZ+2nNsPlLOHTLTGf0olhI9XdIZ/TfRKKDXM32JhfzHretk4WcGgiAj78+SE2fzttqYbeD7JK+plgExh3POf3zx40CqtJbbcAAX9DKGoxq4PuAfM9/Ueo7KslPGRKRH8OhirdbhKn6DFLIctueotrjXnYe0PvlE3Q== 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 Mon 22-01-24 23:14:59, Joakim Tjernlund wrote: > On Mon, 2024-01-22 at 15:04 -0800, Greg KH wrote: [...] > > For mm patches like this, that are not explicitly tagged by the > > maintainers to be included in the stable tree, we need their ack to be > > able to apply them based on their requests. So can you get that for > > this change and provide tested patches, we will be glad to queue them > > up. > > I asked the author and he acknowledged it could be backported. Charan, please chim in. The patch itself is safe to backport but it would be great to here what kind of problem you are trying to deal with. The issue fixed by this patch is more on a corner case side than something that many users should see. Could you share oom report you are seeing? -- Michal Hocko SUSE Labs