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Howlett" , David Hildenbrand , Vlastimil Babka , Jann Horn , Pedro Falcato , Muchun Song , Oscar Salvador , "Jose A. Perez de Azpillaga" , linux-mm@kvack.org, stable@vger.kernel.org Subject: Re: [PATCH v2 0/5] mm/mremap: fix accounting on a partial move Message-ID: References: <20261102-b4-mremap-pre-split-v2-0-d281dd11ad7d@toxicpanda.com> <20261102162304.c3585fc3fb88644118c152d7@linux-foundation.org> X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Stat-Signature: qho7d9dope9e3xzry41gdgxjqojbk4g6 X-Rspamd-Queue-Id: E03EDC0006 X-Rspam-User: X-Rspamd-Server: rspam08 X-Spam-Status: No, score=-5.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_PASS,SPF_PASS autolearn=no autolearn_force=no version=4.0.1 X-HE-Tag: 1793803583-80371 X-HE-Meta: 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 3GQbaijG 3KEWBziA11Vp3mwcvtZznXztqOCHzZ/quXPt85x6rl/+PiJtEswQNhpNtwGQ1g/x6NCAGD1Q465SxNfBtkuai+b2+j5MDaoKfWRckCxGww6ZqvYrCCT4AcRFJ90qBjbXH8KX6FkLwoAOURGcorzfR3h2wpeCgplJXEeBCDQ+oNUmI6Ed+tgPW6tpsPFIyUJ7ipQjCJrO3GidM2PefURbaqCSFBggmcJrJM3uOfVRAuyzWmRbDH7wF3IIhFpGgMX6Z30jo Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On Wed, Nov 04, 2026 at 02:32:35PM +0000, Josef Bacik wrote: > The Committed_AS bugs need an allocation to fail during the unmap at the > end of the move. mremap() checks the map count and sealing before it > gets there, so what's left is small GFP_KERNEL allocations, which in > practice means a process that is already being OOM killed. I only hit > it with fault injection, so I left those with just Fixes and let the > stable folks decide. If you want them cc'ed it's no problem to add. Generally would prefer the fault-injection ones _not_ to be backported, they're essentially technical fixes since to actually hit them <4 KiB allocs would have to fail meaning OOM + fatal signal -> process dying soon anyway so doesn't matter. -- Cheers, Lorenzo