From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out30-130.freemail.mail.aliyun.com (out30-130.freemail.mail.aliyun.com [115.124.30.130]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DA278409277 for ; Fri, 18 Sep 2026 03:59:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=115.124.30.130 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789703943; cv=none; b=AqGqUaeUjwsCL8XO7pv4XzNKhBBluyvyI+OhLfYEU77freUjOXchDJYSANvr+TEveW6URAqNkAqpNpkCiIfkl374tQ5TQmbgrbdw5dDScppc8QweWKXIfI5DcTMNktLFpnqN3eTmuRIkFThuRGZuzH9jDHOxGsQg1NEs5uXFRwE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789703943; c=relaxed/simple; bh=HGM5KbtDXMkgnjxwXFsXCRlOvC088Gdr9mgccBzOuC4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=AzMkhngal54oUG+GaOPDRCjcRts6Dn5TNr2DPnGUfgbZpHr6D2YkNdj5mYvjGujSEIoa3NEiWdbeqEdMqp+se7tROhuOssKHEqbjVNMVKIUJ3JMRYkxK6VHnUJ1YeSEW3ZaLuiX5bqTcRRUMzjR9Mri11RPPxVUSTsmeDfhZ6XI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com; spf=pass smtp.mailfrom=linux.alibaba.com; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b=ydKkrnd+; arc=none smtp.client-ip=115.124.30.130 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b="ydKkrnd+" DKIM-Signature:v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1789703938; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=loQVaTQd/RKm32T1IKVgII9zZSimhBFrCIUTGWgc3Hc=; b=ydKkrnd+BCMCU5dNMiP2CsRm1gZMmejq7P7odVf3kKNqBNGJpW8/RP62/ZKPeytWBQYj/ZIve8qu/ctMuIZpF9utqYtaWY9m+aex95kY0lHmXzQQmdH62W3gmQ/u1tTPwluDPjP5bAnc0a7Xs0Qv6cT4qCTuSHMTpPLoWITc77M= X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R201e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=maildocker-contentspam033037009110;MF=baolin.wang@linux.alibaba.com;NM=1;PH=DS;RN=16;SR=0;TI=SMTPD_---0XB9tapk_1789703936; Received: from localhost(mailfrom:baolin.wang@linux.alibaba.com fp:SMTPD_---0XB9tapk_1789703936 cluster:ay36) by smtp.aliyun-inc.com; Fri, 18 Sep 2026 11:58:56 +0800 From: Baolin Wang To: akpm@linux-foundation.org, hughd@google.com, david@kernel.org Cc: ziy@nvidia.com, liam@infradead.org, nico.pache@linux.dev, ryan.roberts@arm.com, dev.jain@arm.com, baohua@kernel.org, lance.yang@linux.dev, usama.arif@linux.dev, kas@kernel.org, ljs@kernel.org, baolin.wang@linux.alibaba.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH 11/12] mm: khugepaged: allow khugepaged to check all shmem mTHP-sized orders Date: Fri, 18 Sep 2026 11:58:42 +0800 Message-ID: X-Mailer: git-send-email 2.43.5 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit We are now ready to enable shmem mTHP collapse, allowing thp_vma_allowable_orders() to check all permissible shmem large orders. Signed-off-by: Baolin Wang --- mm/khugepaged.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/mm/khugepaged.c b/mm/khugepaged.c index 5c477ea16c6f..4b5e1f8ddf87 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -493,9 +493,14 @@ unsigned long collapse_possible_orders(struct vm_area_struct *vma, { unsigned long orders; - /* If khugepaged is scanning an anonymous vma, allow mTHP collapse */ + /* + * If khugepaged is scanning an anonymous or shmem vma, + * allow mTHP collapse. + */ if ((tva_flags == TVA_KHUGEPAGED) && vma_is_anonymous(vma)) orders = THP_ORDERS_ALL_ANON; + else if ((tva_flags == TVA_KHUGEPAGED) && vma_is_shmem(vma)) + orders = THP_ORDERS_ALL_FILE_DEFAULT; else orders = BIT(HPAGE_PMD_ORDER); -- 2.47.3