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h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=XEtZgdWtSDEYOXXcJomSuJyQq5Mzz0Mdizj3Lv2dTSyiGdaaGNcVUmebO7fsHQ+fy Q/LXepNn6k46F8WKDfeP/cWjenA7HDPwmfv0vugn5SprzaAl9XP+7SOT30DyY5x2OF 5zjREE10nhWot68zfxi612eQqRwRtGEHBfFtM5tg= Message-ID: <0aaf89da-41a3-444f-88ec-ff8a385f38f6@arm.com> Date: Wed, 28 Oct 2026 16:53:28 +0530 X-Archived-By: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 2/7] selftests/mm: check MADV_COLD and MADV_PAGEOUT range handling To: "Gregory Price (Meta)" , linux-kselftest@vger.kernel.org Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, kernel-team@meta.com, akpm@linux-foundation.org, david@kernel.org, ljs@kernel.org, liam@infradead.org, vbabka@kernel.org, rppt@kernel.org, surenb@google.com, mhocko@suse.com, shuah@kernel.org References: <20261019171206.3331374-1-gourry@gourry.net> <20261019171206.3331374-3-gourry@gourry.net> From: Sarthak Sharma Content-Language: en-US In-Reply-To: <20261019171206.3331374-3-gourry@gourry.net> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 8C87C180007 X-Stat-Signature: mhfkg5acyom71ak6q7ae4bafemshozpo X-Rspam-User: X-Spam-Status: No, score=-12.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_PASS,SPF_PASS, USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=4.0.1 X-HE-Tag: 1793186616-350962 X-HE-Meta: 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 CbCoNUQO jmgJjlNXCPxWs9qva2XAzvFPSi54Bnt5aO+CaGQ1pd0h7xd7l3nEjjy+T00dSVCoQ9p88f5QX8fwMRMlwlZGjk4tdWeaOwaRJFSswUxoouRRGDk/jIlrNqnApn958nSz5Ji4sGuUMZMN9msZBzoZGrvQ/yN5eGcJvL0V1+YI9FerNlQdYUxB2EovhUoPg80Wm1rap36FBI61PL2loU4SfrMcvXloAWjUpgeLXvizz/BlrEw52JWriJrBz04HKO0tjn55svv6A5hbTc1iE9TO3S/PqMoBMMoc97tRD5+EaWc/93HsXSX7wBY5vc2LNGnSMeQLq3jeuNzbixGejj2C1JNu5+KS72co72/YSwlfa1ow0Cnf+cBhwuBKNOAeXGi5upGJPic4vYrgyllCGgpRdVWQWng== 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 10/19/26 10:42 PM, Gregory Price (Meta) wrote: > madvise(2) accepts a zero-length range, rejects an unaligned start, and > reports an unmapped gap in the range with ENOMEM while still applying the > advice to the mapped pages on either side. > > Check each of these for both hints. Around the gap, only MADV_PAGEOUT has > an effect the test can observe, so only MADV_PAGEOUT is checked for > paging out both neighbors, and only if MADV_PAGEOUT can swap at all. > Both hints' ENOMEM is checked first, so it is covered without swap. > > Signed-off-by: Gregory Price (Meta) Looks good to me. Reviewed-by: Sarthak Sharma