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b=Dgsa7x8C8tWIYQQ/s12+OFSXr2Jl29hGtb+NWQ1pyqKXx7fw6Gg0hOLHCahd0KsiY izuLVvZrF4m6riNlJPR3Qkb6l/dUEacijzfvNQ1WhqKIfGu2UQBbidWk43S+C6Hut8 MwLqEl50vfgyplsXCIqOSOX78Tsl9Ews9ZgXfsCY= Date: Wed, 20 Aug 2025 22:02:12 -0700 From: Andrew Morton To: David Hildenbrand Cc: Zi Yan , "Pankaj Raghav (Samsung)" , Matthew Wilcox , Luis Chamberlain , Jinjiang Tu , Oscar Salvador , linmiaohe@huawei.com, mhocko@kernel.org, linux-mm@kvack.org, wangkefeng.wang@huawei.com Subject: Re: [PATCH v2 2/2] mm/memory_hotplug: fix hwpoisoned large folio handling in do_migrate_range Message-Id: <20250820220212.bac0423a778d3b04b05d8bec@linux-foundation.org> In-Reply-To: References: <61325284-d1d6-a973-8aa7-c0f226db95fa@huawei.com> <924d9d25-e53c-f159-6ec0-e1fd4e96d6e2@huawei.com> <4c5d4fd5-5582-11d8-9fee-24828ac1913d@huawei.com> <8c9719f0-c072-40bb-b7f6-6f2cc41a31dc@redhat.com> <1D589FE5-3515-4ED5-B12E-D5CE23BA5D13@nvidia.com> <641F5B0B-2B48-46FA-AC58-3A8A4BEB1448@nvidia.com> <3702f6b0-27a9-4ca1-adbd-fb1e2985b2d3@redhat.com> <345f7ae6-b2d6-44cd-b8b6-2bdd4b33e9d6@redhat.com> <66bc7274-ec2a-423a-8094-b8d4cc9438fe@redhat.com> <20250719192300.9e32c35ddc49f11c7954306b@linux-foundation.org> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Stat-Signature: wo7s6prco3w3sj4ainu3uq9qpiykcy6w X-Rspam-User: X-Rspamd-Queue-Id: B1CA4C0012 X-Rspamd-Server: rspam05 X-HE-Tag: 1755752534-43372 X-HE-Meta: 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 XN0yewrR AiqseiQcXYZ7epTQEUHtHvy1xqvBod0Wnl1tTrmLnBs75TUZoPaMrZJD2hHGwrfL5+stCBPtHuPDhkqBYQoJ9pW4ox2cbubWCTRslCA4ivjyVoEUv3I+DsLf4+SPdC7e+O/BTzWV65Ek4LlUcdbNylRp2psKkl1b5NUY2EirIkwdv/hiPzJjhKPB3AAZWdLrnoyk5T1ktvaxxXIpMo0IbY7tVZvWldfyL0hAbCETaWQPpl5LmlMYa/aJt9Tluu9Ou3svp6QZGNmWb05jRT+My9LGwwn8yrHn2vKndH4rsEeXP+emKIdlIy1qfCG28PuPlg+E7 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, 22 Jul 2025 17:30:06 +0200 David Hildenbrand wrote: > On 20.07.25 04:23, Andrew Morton wrote: > > > > I continue to retain the original patch in mm-hotfixes as part of > > akpm's lame bug-tracking system. 3 weeks in -next. > > > > And I just added a cc:stable to it because December 2018. > > > > I don't expect many real-world users will be putting fake delays in > > memory_failure(), but it's there. > > > > So what do we do here? Add a TODO, merge it under the > > better-than-it-was-before theory and move on? > > I would feel better if we could just not fail memory offlining. Memory > offlining is documented to loop forever if something bad happens, and > user space can cancel it. > Pathetic monthly prod to keep this on people's radar.