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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-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261028100119.11340-1-zenghui.yu@linux.dev> 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