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Thu, 26 Jun 2025 14:17:14 -0400 X-MC-Unique: 4EhFUjdSMAOaRkKT-_rf4g-1 X-Mimecast-MFC-AGG-ID: 4EhFUjdSMAOaRkKT-_rf4g_1750961833 Received: from mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.93]) (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 A1D7F19560B9; Thu, 26 Jun 2025 18:17:12 +0000 (UTC) Received: from fedora.redhat.com (unknown [10.22.64.64]) by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id C2DC218003FC; Thu, 26 Jun 2025 18:17:10 +0000 (UTC) From: Luiz Capitulino To: david@redhat.com, willy@infradead.org Cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, lcapitulino@gmail.com, shivankg@amd.com Subject: [PATCH 0/3] mm: introduce snapshot_page() Date: Thu, 26 Jun 2025 14:16:50 -0400 Message-ID: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: C77C34000C X-Stat-Signature: ax3err7cndui6yp54ndz3dw7dxd68b5n X-Rspam-User: X-HE-Tag: 1750961839-10176 X-HE-Meta: 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 qhPGsnOz nZUcbyue723K89xpdVxJnOb/+N4YUWsxQshhCT3YrNeX/KO+zsuRJ34Zj6Z9R5482wL/vOF8D8J2XDKQ7jlsViNPWcnOQbY0nXy5DSrM4IWihcz7Jq/Q8CSGh6VSsAce5O961hbHC7ff4GgYzvXSbYQVPepv1IuvHrHf5GE6XmDtasJLW+Q04r2qvZp/QMV8QNUymMDm3e64yeKN9QoDuJxFpyLTVshGuTM2kqEE1kEL/zSc5z0L5yJA/lTdfB8JQb3EgHxGAgZfMEt6yaMuRLRjkbB/L8pSRxDr0nANp9sbR7p5tP4Xluaao/MJLxvpixND4io+FGZSMta3DStmw/LIDePUWlI8NEjYkYxdvcC+CXWb6q+DzJM8zxB+iOQYR+uLY 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, 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. This series is on top of latest Linus tree (c4dce0c094a8). Changelog ========= RFC -> v1 - Include to avoid build error on sh arch Luiz Capitulino (3): mm: introduce snapshot_page() proc: kpagecount: use snapshot_page() fs: stable_page_flags(): use snapshot_page() fs/proc/page.c | 46 +++++++++++++++++++---------- include/linux/mm.h | 20 +++++++++++++ mm/debug.c | 42 +++------------------------ mm/util.c | 72 ++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 127 insertions(+), 53 deletions(-) -- 2.49.0