From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=95.215.58.37 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793692885; b=0EY15iH2bjpxjcziyCtG+4BhfWltAMU/R+nJ+yQ4drzythm1NbSyr5pHpMhIULuavw7y psWMgjVGWV/lZCeDv5Md2rg0P9TB2CpMytEygJjqsAzG6elRZyX33NuM6ledoCO5tffms tUg5vsiTQw5C9Goqah6TBHzm29xuf+zjvMDwpZhpQQtQRRigKKBvYZRd5tmC6R/UgjHRH NBu0FmUKzHFy6isS+CzxPR+zzOpQEvb8Mz4YYfOYZMc9iA0dF1TwjmNI5luhge6NfGYCN gWVHmxTxzJM2aGTOM1jrgV5bxmXgakxkYgMGYvAYSoafbjFwKKSJ6SVqY/mtuTKM52g== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793692885; 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=Dq6oOFOAZU2isTmULY88ZuxmHS/TA88BLaSmBq2/KSc=; b=bD7cVd6j0sd+MU6/Uyf30liWIY3IkQwDsE+wnpaFfYl3dwQrS5BPpVHIusKwELuKNrkl 1ue/brmL4K9r3g0EXbe17I5iqP9F/7TyM1h3oxrqwvlWQpF6G6j3fs948bkEf1ZL5fW51 CrArGQ/CPv/a9HSY+bVI3ogUMr+mRybpozJKFcHQyaF+ARhACfEVgrCgQLy8sk/MW5KZy pRNL+3ZaRc7/CIrDmK4yLN4A3t7gxap3Y7G7IQnYFlfSdTItNJUabr/QrdQTBpRkmpRTO QAbbITWBWJ+Iq4dAy3MpMxJu6o/oeN/VGDC+7hS5MgQa+JSr3jGJnrVBLEGacdWYRGQ== 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=KINhXhpQ; arc=none smtp.remote-ip=95.215.58.37 Received: from mta1.migadu.com (out-37.mta1.migadu.com [95.215.58.37]) (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 DF22E606A33A for ; Tue, 3 Nov 2026 08:01:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org DF22E606A33A 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=KINhXhpQ X-Envelope-To: linux-kernel@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=kdenmgDIdcPw1gofp+pTbFrp5V8zDpPUvs8MrZtt0Lk=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1793692881; v=1; x=1794297681; b=KINhXhpQo6Z5xPdSXPPsx0nf/J0lHWKXck8ODR7OaMUSROoCZxv7QES/dD+P99XXs8F1xWpd qBDt/RNG9nbpEd9Mm+WW0Ow9iSpjRcIvUkI1NwfEC0vFbRkInd48LUAYvHI5JWCbRr77sJB+cZ4 huwf/cFgJYDAPJDvfBzTbG7Q= X-Envelope-To: linux-kernel@vger.kernel.org Received: by smtp.migadu.com with ESMTPS id 656623d56c083c98; Tue, 03 Nov 2026 08:01:21 +0000 X-Mizu-Trace-ID: 656623d56c083c98 X-Migadu-Flow: FLOW_OUT From: Qi Zheng To: muchun.song@linux.dev, osalvador@suse.de, david@kernel.org, akpm@linux-foundation.org, azpijr@gmail.com Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Qi Zheng Subject: [PATCH 0/4] mm: hugetlb: fix some CMA-related issues Date: Tue, 3 Nov 2026 16:01:03 +0800 Message-ID: X-Mailer: git-send-email 2.48.1 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: Qi Zheng Hi all, This series fixes four CMA-related issues in HugeTLB reservation and allocation: - Avoid ineffective CMA reservations on 32-bit x86 kernels running on CPUs that advertise 1 GiB page support. - Honor PF_MEMALLOC_PIN to avoid allocating CMA-backed folios during long-term pinning. - Skip CMA allocation when the caller disallows direct reclaim. - Enforce cpuset restrictions on surplus allocations, preserving memory policy semantics and handling concurrent cpuset changes without discarding folios that remain eligible. Thanks, Qi Qi Zheng (4): x86: hugetlb: disable default CMA reservations on 32-bit kernel mm: hugetlb: skip CMA allocations under PF_MEMALLOC_PIN mm: hugetlb: skip CMA when direct reclaim is disallowed mm: hugetlb: respect cpuset restrictions for surplus allocations arch/x86/mm/hugetlbpage.c | 2 +- mm/hugetlb.c | 38 +++++++++++++++++++++++++++++++------- mm/hugetlb_cma.c | 5 ++++- 3 files changed, 36 insertions(+), 9 deletions(-) base-commit: 2637bdec0535a2044cd830eba9a79363651d9043 -- 2.54.0