From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B3FC4CA0EEB for ; Fri, 22 Aug 2025 17:07:52 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 075B1440154; Fri, 22 Aug 2025 13:07:52 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 026F28E009D; Fri, 22 Aug 2025 13:07:51 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E307C440154; Fri, 22 Aug 2025 13:07:51 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id CE7A98E009D for ; Fri, 22 Aug 2025 13:07:51 -0400 (EDT) Received: from smtpin20.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id 9A11211756D for ; Fri, 22 Aug 2025 17:07:51 +0000 (UTC) X-FDA: 83805025542.20.B488039 Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by imf01.hostedemail.com (Postfix) with ESMTP id 1A80740015 for ; Fri, 22 Aug 2025 17:07:49 +0000 (UTC) Authentication-Results: imf01.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=fSplAPAb; spf=pass (imf01.hostedemail.com: domain of sj@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=sj@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1755882470; a=rsa-sha256; cv=none; b=Hm2JiKZcK+D+zj6rdquBzfaDSLYOmKxYnLFLYa/BHMB5hq7gv8KXSot6gKntrY5eHsZ2Iy VxRX0F4sVBEYwFYI8bePOWpepjYSveieCFh6rR7nEz2t/3XZTLPBbXVBDpfsMn4YAhjIRM VPHjNNzKjMeCU6bFGhlD2cP79YTaW6U= ARC-Authentication-Results: i=1; imf01.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=fSplAPAb; spf=pass (imf01.hostedemail.com: domain of sj@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=sj@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1755882470; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=QFfb/Sn4tzsBL8+lFf8/4nSkR7hbOY5oXUR5CVb78zM=; b=jF3RAO1vc4plFBI3zMRQR/3krwwTRu4l3mC76YiFc7J9F9QOycfact1mnL6JAL0HEptmT0 cQJCLUrf7k/U/3r/dBxMokLipdA3wAxg4KvAoy1bX5fMBWdELZotKfjPtmrdMGHb82hI44 Nf3nmfSm3GR083od1PHDpfJlEQ3JFFQ= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 2DE1360203; Fri, 22 Aug 2025 17:07:49 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id AD1D1C4CEF4; Fri, 22 Aug 2025 17:07:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1755882468; bh=vZLAjgh0rHfPoMdjN4T/8EdoC5/y95Yj/31fEqm5lgA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fSplAPAbcqCwXrc73KaBOQNzaayHHHryXHEfz/QvCIP5+OLUcuUqhayGQU30an1Hx YGDC2ch0190J8ZS7lR1jUdP6OQwlEiLMILXs/CkC/SlPI/9/wAF5EXwIZ0nb0Uecnj UA9Ha7hLdu3BvCtDoUnTti40P6RP3bVkvwZuA5UDhaj8Dob3g32dp2vkLL6LUz2Uga JrNca6OOm6CtiYGSnyjbJHFyuYTMa9sirnIIEndUMU2kE26IZfHRAqBcN1+HEuWJKI iH1nd0618aV38WN9VJmQt9ibmxV/jw/X7xirOs3F2GwN8kBuIL5KMKravrNObUYubi MyQ+vWsMpUjxQ== From: SeongJae Park To: David Hildenbrand Cc: SeongJae Park , linux-kernel@vger.kernel.org, Alexander Potapenko , Andrew Morton , Brendan Jackman , Christoph Lameter , Dennis Zhou , Dmitry Vyukov , dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, iommu@lists.linux.dev, io-uring@vger.kernel.org, Jason Gunthorpe , Jens Axboe , Johannes Weiner , John Hubbard , kasan-dev@googlegroups.com, kvm@vger.kernel.org, "Liam R. Howlett" , Linus Torvalds , linux-arm-kernel@axis.com, linux-arm-kernel@lists.infradead.org, linux-crypto@vger.kernel.org, linux-ide@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mips@vger.kernel.org, linux-mmc@vger.kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, Lorenzo Stoakes , Marco Elver , Marek Szyprowski , Michal Hocko , Mike Rapoport , Muchun Song , netdev@vger.kernel.org, Oscar Salvador , Peter Xu , Robin Murphy , Suren Baghdasaryan , Tejun Heo , virtualization@lists.linux.dev, Vlastimil Babka , wireguard@lists.zx2c4.com, x86@kernel.org, Zi Yan Subject: Re: [PATCH RFC 06/35] mm/page_alloc: reject unreasonable folio/compound page sizes in alloc_contig_range_noprof() Date: Fri, 22 Aug 2025 10:07:46 -0700 Message-Id: <20250822170746.53309-1-sj@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250821200701.1329277-7-david@redhat.com> References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 1A80740015 X-Stat-Signature: mxdk1ndyiwh5pmkmicdjyi7mrsa7mfmr X-Rspam-User: X-HE-Tag: 1755882469-420833 X-HE-Meta: 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 Ko+iosp0 JZRehE3YVRwxrn28QpmiR12xqTfNQYkdR0u8zSa3+pyZXftxSOeZEEFayqmnPsbdrk8g/fwjcNfUfSe1zUB9Cm9rDbqqAvDyDEPyOB2SHwMDX0Pibei6KfLebgBROscd8J8t0hRGhxCcoGkXQDrIwbeyOY03wnM1LIpa8bokAmw4KMmuwwQ4qrF9OxSSH+D+h5MIk3P0lMpDUnVGZkyhWTZPFjFWWG5hda5P49se66mI7QupERYztGGFHrVdPvT2Y9LWSRedLHSjvfbPIhprkgo673u6xjDw9/J9JFo2mAYI1EzR/JTwLasLTkwrVguibG1NsiyOFo9SQjWE= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, 21 Aug 2025 22:06:32 +0200 David Hildenbrand wrote: > Let's reject them early, I like early failures. :) > which in turn makes folio_alloc_gigantic() reject > them properly. > > To avoid converting from order to nr_pages, let's just add MAX_FOLIO_ORDER > and calculate MAX_FOLIO_NR_PAGES based on that. > > Signed-off-by: David Hildenbrand Acked-by: SeongJae Park Thanks, SJ [...]