From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=95.215.58.103 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793587776; b=dvrMWnl5000LuEz6146ZN1pgeVqIC/Jr8/49RzmCYBs8eHD4OuY5OVfyijjnR5rgVDfI EOk04MLgmrkqllyG33Ig+ApsD5CI9qHqWclWDhbB2jEkkST94/beiyE0Y4p38jGi3KDYL VfdfT9CbNLwixZeW3LEkwTwYpLfEHYn1Ih4LK9jLLovbgvOV1oUckEGRjqrEcIEJ6r1oT 31PaWqiNTTX1k0Hhemzhi+DlrYxq33aK06gAdTJ4DcMGBgoH+eCCQ8Qh+vGGGb2pAp3f6 wOjFklNPZkdigwZXv6kep85wlKALpnxmvbtTZ3ziIsbpUlka96CPMEwj1M1UKYW5Z2g== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793587776; h=DMARC-Filter:X-Envelope-To:DKIM-Signature:X-Envelope-To:Received: X-Mizu-Trace-ID:X-Migadu-Flow:From:To:Cc:Subject:Date:Message-ID: X-Mailer:MIME-Version:Content-Transfer-Encoding; bh=K2Pl66GiCtSnRt14sAo6wYdJhq6b9lHCX2PYrIZzXQc=; b=WOwMioR7QKYdUsEcZAsUxae2RhngjjggwBuneROQ4J+eMFL2unVOaTa6ws0pd+zxLvaE VAxsOCAX6bSY9864n/sYZyl5If4ZIcY6LhuHfHMsBy4hRv+FmIqTzsJfQduWCv0woVjYa dvilidhtPYYfOFrFue8FF0MPZaf9P9UhtssQIu3FLlqkgWYQX+jwavf9YBDlu0Ar6UDAD fFRNnXuxc0lThz2B0lyN5oHkl4H2NyubxVEmmOJuF7nbqUMU61YzAl/Ifm824+zbRrEXs V0y1988mEoGOv/1mD/eICn6THGkONCXGu6yp/lAfqgswPw96XuKf6CUJNUDXnBqmSjg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b="Y7NMm/hy"; arc=none smtp.remote-ip=95.215.58.103 Received: from mta1.migadu.com (out-103.mta1.migadu.com [95.215.58.103]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D48F9606A326 for ; Mon, 2 Nov 2026 02:49:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org D48F9606A326 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=Y7NMm/hy X-Envelope-To: linux-kernel@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=iz3xRoZLABnzuJqgORKF3hs5vSDtn7j2yh2I+RtFt4k=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1793587772; v=1; x=1794192572; b=Y7NMm/hy6+FZSncn4IkWDmJKlBOJCTZruBIb9D5QQKe3qNhZwkkYwzfjAJnZfT/VIpnvXClF Efda/uTm5JGWk1GKAvG3oK0pon11f5l2ni1rEO48LiKR/+XXOwRzv7vJ6Qj1wwKCjx9bZaBGJpA c1A6HCkXed0az8kA2oukQ7MA= X-Envelope-To: linux-kernel@vger.kernel.org Received: by smtp.migadu.com with ESMTPS id 544bc17d499f049c; Mon, 02 Nov 2026 02:49:32 +0000 X-Mizu-Trace-ID: 544bc17d499f049c X-Migadu-Flow: FLOW_OUT From: Kaitao Cheng To: Muchun Song , Oscar Salvador , David Hildenbrand , Andrew Morton , Mike Rapoport , Johannes Weiner , Michal Hocko , Roman Gushchin , Shakeel Butt Cc: Mani Tofigh , Zi Yan , Mike Kravetz , Baolin Wang , Miaohe Lin , Naoya Horiguchi , Frank van der Linden , Chris Down , Joshua Hahn , linux-mm@kvack.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, Kaitao Cheng Subject: [PATCH v2 0/3] mm/hugetlb: Fix CMA parsing, flags and usage accounting Date: Mon, 2 Nov 2026 10:49:07 +0800 Message-ID: <20261102024910.31486-1-kaitao.cheng@linux.dev> X-Mailer: git-send-email 2.54.0 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This series fixes three independent HugeTLB issues reported by Sashiko, covering CMA parameter parsing, persistent folio flags, and NR_HUGETLB accounting on allocation rollback. Patch 1 rejects a global hugetlb_cma size following node-specific entries. This prevents malformed input from overwriting valid per-node reservations with an incorrectly parsed global size. Patch 2 preserves persistent folio flags when a failed vmemmap restore returns a folio to the pool. This retains CMA allocation tracking and raw hardware poison information, while ensuring transient flags are cleared before returning the folio. Patch 3 moves NR_HUGETLB node accounting to the underlying folio state transitions and separates it from memcg statistics. This keeps the counter balanced when surplus folios are freed during reservation gathering or after a failed overcommit recheck. Changes in v2: - Patch 2: Preserve persistent flags, clear transient flags, and warn about unexpected flags. - Patch 3: Account at folio state transitions and separate node and memcg statistics. Link to v1: https://lore.kernel.org/all/20261028113319.38544-1-kaitao.cheng@linux.dev/ Kaitao Cheng (3): mm/hugetlb_cma: fix incorrect hugetlb_cma_size assignment on malformed input mm/hugetlb: Preserve persistent flags when returning folios to the pool mm/hugetlb: Fix NR_HUGETLB accounting for surplus folios mm/hugetlb.c | 52 +++++++++++++++++++++++++++++++----------------- mm/hugetlb_cma.c | 3 +++ mm/memcontrol.c | 6 +----- 3 files changed, 38 insertions(+), 23 deletions(-) -- 2.54.0 (Apple Git-157)