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Thu, 14 Aug 2025 20:15:00 -0700 (PDT) Date: Fri, 15 Aug 2025 03:14:58 +0000 From: Wei Yang To: Zi Yan Cc: Wei Yang , wang lian , Baolin Wang , David Hildenbrand , linux-mm@kvack.org, Andrew Morton , Lorenzo Stoakes , "Liam R. Howlett" , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Shuah Khan , linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: Re: [PATCH v4 3/5] selftests/mm: reimplement is_backed_by_thp() with more precise check Message-ID: <20250815031458.455xxdaiv4m3npxc@master> Reply-To: Wei Yang References: <20250815023915.1394655-1-ziy@nvidia.com> <20250815023915.1394655-4-ziy@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250815023915.1394655-4-ziy@nvidia.com> User-Agent: NeoMutt/20170113 (1.7.2) X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 1A8BB100008 X-Stat-Signature: 1w8xx8m7p3b1gwhrsjs6pkmwrged3ock X-Rspam-User: X-HE-Tag: 1755227702-508755 X-HE-Meta: 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 +aIEcDC6 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 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 Thu, Aug 14, 2025 at 10:39:12PM -0400, Zi Yan wrote: >and rename it to is_backed_by_folio(). > >is_backed_by_folio() checks if the given vaddr is backed a folio with >a given order. It does so by: >1. getting the pfn of the vaddr; >2. checking kpageflags of the pfn; > >if order is greater than 0: >3. checking kpageflags of the head pfn; >4. checking kpageflags of all tail pfns. > >pmd_order is added to split_huge_page_test.c and replaces max_order. > >Signed-off-by: Zi Yan Reviewed-by: Wei Yang -- Wei Yang Help you, Help me