From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=91.218.175.29 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793587777; b=evSwbWM/zRwfIz9wkuHI6JwEduiUwSU2WktXsQtoY6ykGj9uyAx7iH6uIjqmqkjRv3px 0Gadj1bcyX337qf7yoeQdbCr+XhzoLL9V75hGssBxzVIl/3eCmH6OD8p8ABR9E3RMc2wk Xi9+SbPX3rSA5arVlatCNRa5iC9NLIT8ehsRB1Uh5tqqnw1pW7Fto0zLB+98eZb8Yh7KF 2rCdmf+79yNuiuLQ0+aiMzSzE10e/87nNEfb9E5O5IYXzO2Q6A04qnzpqUHtJaPuM1lRt vudZcgAiLZbZhH4ISyo+h+YVcDHdRxs++HVXBPzeNaDFiJ8K71oqHtxa6x0KgqszEPw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793587777; 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=EdqwFuV2SeHd6STjoM6f6+kszRxKzfQniGx79LR3mDeO1iEFtf5cqgdGJUuWAdoT9Qxp 23zAu/HxjwalN8as4IJ3L/969JPEOc5o8h/DkGYc1go5MvI5WlhSbnt8FYCtK9Rwr06ci haJ+JkXaB4NF7XsO2TPmL6Sf5p6ENENKzwdxGjEwgAv1HZwzZPN1Za3uGduuNU8FudPJ2 TwWQsgH0EFl+FAbQvuPygp4+fP9pSJeDeDAO89zzbrx/6KAQ8go993Yn1gujXQjB6W3MF IsbwyJSR2OBQzFBCS7o0bQfGNeqsQed6PO65STdn8J2Yc4nmsIV/mNWBGGAH0Yph/lA== 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=91.218.175.29 Received: from mta0.migadu.com (out-29.mta0.migadu.com [91.218.175.29]) (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 BDBDF606A324 for ; Mon, 2 Nov 2026 02:49:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org BDBDF606A324 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: cgroups@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: cgroups@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: cgroups@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)