From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=91.218.175.32 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793187213; b=5ZLPvkPzJCb6dyPFv0dpZnhJ/1KcNq+D8E9es4+ecEyawWWeF2SNgTa3LERE7MY5E+Ha oSHLdKVsCWA6ezcd7FTcen5hiBGHmyyweMQel9d3jUpeIlkf7F3E32UToSPUF4gFP5/U8 +s0AfiOPlv0fC+tYfYuonIZMWXf9s7QAj2J7JyVXVsZZfS480acKp146EDFT9QLSZaz4h 4hBb4IDbC6snKZ8/+17msale5DonMfmU4CJmPlxWwY9BFkuOwAI0nPfoLyvis2S5CYOIP ferDuKS0Q4emj0DBi+52iGPXdwPNpgmbVRWi1+PsY/mfqoJTvQaL/aDr+FZNi9xdAmg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793187213; 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=I8Qx+rwY6H3jQ6L89yvvvHh+9fiYuKQUWmXchJSlClg=; b=zhI1W+q2qHAaJbaeDW2Qapl+N6HKkeoRQXC74PpAVzZZc0G+SKyNw5S8A2IjMzgDvU5j mE2WtddKV/vIFej3msYbKCDbIA3+0FpRKsDX50BTVh6MFMiwWTGXkbdlsAa9MorEw2MH7 0pdxwOkqheupIRJhCSG0z9r1mxIh2EDYPUKhFcggV4HY/gVnGfazHMk6P6Ld4pMmbGlvR gV2P24ihE7+menkwKZMVDEgAep0x8juLhengsFAQwc1Jq2pGmmRLk+IwjNa+3Lj9GQxvP d/gOsOLZZewZ18JR1MOW+dj2Kvax6koASOXIz1siUKajwO921RL1b1E7SNvMyXhlahg== 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=dcYKIC6l; arc=none smtp.remote-ip=91.218.175.32 Received: from mta0.migadu.com (out-32.mta0.migadu.com [91.218.175.32]) (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 3A4B3606A31D for ; Wed, 28 Oct 2026 11:33:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 3A4B3606A31D 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=dcYKIC6l X-Envelope-To: linux-kernel@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=uj6DpQ+dYHugok4ARQkYXSn+IV5soWPeKjdz94Jwpd0=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1793187209; v=1; x=1793792009; b=dcYKIC6lUcS1vobgg/rKKtcTKJh2je3fA4ESE5C9StvQp4g1Q5nDtijXXaa3vuKczCjMUXjK 4nEfNccXRaZbNCV8gPRGC7Gj6CmDVYzgXNWnBLDZgEO8JyIvM+W4Trv9jMDPJPczdnN2H2OwMWR OMHD3l4lkrbm7KnTFyb4v6Yc= X-Envelope-To: linux-kernel@vger.kernel.org Received: by smtp.migadu.com with ESMTPS id 33cbc6c67f81e8a8; Wed, 28 Oct 2026 11:33:29 +0000 X-Mizu-Trace-ID: 33cbc6c67f81e8a8 X-Migadu-Flow: FLOW_OUT From: Kaitao Cheng To: Muchun Song , Oscar Salvador , David Hildenbrand , Andrew Morton Cc: Baolin Wang , Mike Kravetz , Frank van der Linden , Michal Hocko , Joshua Hahn , Chris Down , Roman Gushchin , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Kaitao Cheng Subject: [PATCH 0/3] Subject: mm/hugetlb: fix CMA handling and surplus allocation accounting Date: Wed, 28 Oct 2026 19:33:16 +0800 Message-ID: <20261028113319.38544-1-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 From: Kaitao Cheng This series fixes three independent HugeTLB issues reported by Sashiko, covering CMA parameter parsing, CMA allocation state preservation, 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 the CMA flag when a folio is returned to the HugeTLB pool after vmemmap restoration fails. This ensures that a subsequent free releases the CMA allocation correctly instead of leaving its bitmap set. Patch 3 fixes NR_HUGETLB accounting when unused surplus folios are freed during allocation or reservation cleanup. Kaitao Cheng (3): mm/hugetlb_cma: fix incorrect hugetlb_cma_size assignment on malformed input mm/hugetlb: preserve CMA flag when returning folios to the pool mm/hugetlb: fix NR_HUGETLB accounting for unused surplus folios mm/hugetlb.c | 13 +++++++++++-- mm/hugetlb_cma.c | 3 +++ 2 files changed, 14 insertions(+), 2 deletions(-) -- 2.53.0