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Wed, 28 Oct 2026 08:51:35 -0400 (EDT) Date: Wed, 28 Oct 2026 12:51:33 +0000 From: Kiryl Shutsemau To: Zenghui Yu Cc: linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, akpm@linux-foundation.org, david@kernel.org, ziy@nvidia.com, baolin.wang@linux.alibaba.com, liam@infradead.org, nico.pache@linux.dev, ryan.roberts@arm.com, dev.jain@arm.com, baohua@kernel.org, lance.yang@linux.dev, usama.arif@linux.dev, ljs@kernel.org, vbabka@kernel.org, rppt@kernel.org, surenb@google.com, mhocko@suse.com Subject: Re: [PATCH] selftests/mm: skip collapse_compound_extreme() on THP allocation failure Message-ID: References: <20261028100119.11340-1-zenghui.yu@linux.dev> X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261028100119.11340-1-zenghui.yu@linux.dev> X-Rspamd-Queue-Id: 96E5840006 X-Stat-Signature: tp86xujkqk1fbx3849fh9hwshubt7c9h X-Rspamd-Server: rspam06 X-Spam-Status: No, score=-10.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_PASS,SPF_PASS autolearn=ham autolearn_force=no version=4.0.1 X-Rspam-User: X-HE-Tag: 1793191903-875291 X-HE-Meta: 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 7VeGmykJ Zy+nOJDz0E4dI8e0XpF9AbBz8anmSQ3B/sDN0MXNjFeZDUkEI2lgHdD4ADYdEW+1xw0MKRuFyZijmCeqii1Wwi3ekaezYkQcBFx/dgwIJNki40MUFzs/0NBIzctCxeY4r6lnuh7gmSgeQ8v7bEqh7sT42eMpADRQ8mubfvio77ebd3yV9ue7SCD76NbAVJjXgbU4cNZDZUUY5zWfQzpJZMOQlNz/pevDVzkUTWIAsDc5/XM3yKyITOAhhy1l0jSw0A0taXCv3vDdDx57UM9YrpjQM/CerPkRXLptWt/TRUqPRMze+vUYAt3WQdO+RpH+VfBUH50mbIS6NaNxi3ZgTDZBTJArvweb5tKAY 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, Oct 28, 2026 at 06:01:19PM +0800, Zenghui Yu wrote: > From: "Zenghui Yu (Huawei)" > > collapse_compound_extreme() needs hpage_pmd_nr PMD-order allocations in a > row, and it kills the whole test binary via ksft_exit_fail_msg() as soon as > one of them fails. > > Gating the case by PMD size (commit b36bec6a01b1) -- the current workaround Nit: checkpatch wants the full form: commit b36bec6a01b1 ("selftests/mm: skip collapse_compound_extreme() where the PMD is too large") Otherwise looks good. Thanks for chasing it. Reviewed-by: Kiryl Shutsemau (Meta) -- Kiryl Shutsemau / Kirill A. Shutemov