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Mon, 07 Jul 2025 14:51:05 -0400 X-MC-Unique: 76OGRBWVO_STno-pmGohkg-1 X-Mimecast-MFC-AGG-ID: 76OGRBWVO_STno-pmGohkg_1751914263 Received: from mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.40]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 05CA1193585F; Mon, 7 Jul 2025 18:51:03 +0000 (UTC) Received: from fedora.redhat.com (unknown [10.22.80.96]) by mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 6343519560B2; Mon, 7 Jul 2025 18:51:01 +0000 (UTC) From: Luiz Capitulino To: david@redhat.com, willy@infradead.org, akpm@linux-foundation.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, shivankg@amd.com, sj@kernel.org Subject: [PATCH v2 0/4] mm: introduce snapshot_page() Date: Mon, 7 Jul 2025 14:50:42 -0400 Message-ID: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.0 on 10.30.177.40 X-Stat-Signature: u7hipw5jr9kyestt395s5y6en5fjckbe X-Rspam-User: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: EB67610000A X-HE-Tag: 1751914269-131397 X-HE-Meta: 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 eB/bXFJq olIgnv+T25n/bek1CYp7ybLOqkQRcB2VJCkglbue/TZa0afC+ak1SxEQWo4ndtZq1WngfKQjjo+eQcUarY8cUx2RypL1EfB1yylIJwctGG1Grqgpio7pJKGzcOeLY04ReeJqDZq4PQeX5Nmv2ECCqvZkteSggPLcwBDxN0UYACGiA9ZCJbTzTc41YMfxDzeZ24/Cv6IA/81BzBfgEPGzi93/oeu/6Cv8Qi8+W3IzZtF/rdGpsi0UHNE9U/FZC0w1G/uC1mQPG9tkHiF19dESBkUkt6EApKyaQBobCZ+OBQFTIzNBZe2z/efcF0aq12nbxT6VSkrvU/F79EON/P1um2H839CWS91ySx//j 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: Hi, The series introduction will follow the changelog. This is against v6.16-rc5. Changelog ========= v1 -> v2 - Include is_huge_zero_pfn() patch and use it (David) - Move free page detection to snapshot_page() (David) - Changelog improvements (Shivank) - Added Acked-bys RFC -> v1 - Include to avoid build error on sh arch Introduction ============ This series introduces snapshot_page(), a helper function that can be used to create a snapshot of a struct page and its associated struct folio. This function is intended to help callers with a consistent view of a a folio while reducing the chance of encountering partially updated or inconsistent state, such as during folio splitting which could lead to crashes and BUG_ON()s being triggered. David Hildenbrand (1): mm/memory: introduce is_huge_zero_pfn() and use it in vm_normal_page_pmd() Luiz Capitulino (3): mm/util: introduce snapshot_page() proc: kpagecount: use snapshot_page() fs: stable_page_flags(): use snapshot_page() fs/proc/page.c | 50 +++++++++++++++----------- include/linux/huge_mm.h | 12 ++++++- include/linux/mm.h | 19 ++++++++++ mm/debug.c | 42 +++------------------- mm/memory.c | 2 +- mm/util.c | 77 +++++++++++++++++++++++++++++++++++++++++ 6 files changed, 142 insertions(+), 60 deletions(-) -- 2.50.0