From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 A83D12E040E for ; Tue, 9 Jun 2026 14:18:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781014701; cv=none; b=cbLq6pcumDJV0tz6jkUd9tclAviYaR/qvWYK4z0+x/I73/UqeSMq//qVfTRNXRT8IlHqsuAPOv5rirC8HopN+Ju/eacAN2KSU+0JcpWv2dbvu7AnZJVKQ3XL067ZKVWZiZ6CdouKhRASuGBCNVdYteQYETtz33VzHZEPB31FFxI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781014701; c=relaxed/simple; bh=0WYFwFeJCKTb4OvgsN+/QwmXiQX2Wkj2uvk1aDVfbfc=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=H58RFS1FXgQ+7+L/CttbXNig6BKAwUdyIB18K08UeiNL0T76pMCQbOtkLbEcIMGCoFevGOQj11soqOqZddwl0MGwmUJg8p/QPdhhE76oWCRFNov+tW9aNyT1+nRTlNlO2az/wTgwYk0Z4eF1T5qV+4xl9i+4I4ae7vSoIHgXVck= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=nYRLlWyQ; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="nYRLlWyQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7519A1F00893; Tue, 9 Jun 2026 14:18:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1781014700; bh=Ubw2QAHudl/FE49qmZ7aPjPEDa/Kg3T1xskL7HEGaIg=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=nYRLlWyQHRUmTcPUVMyh+6nCWHLZxRljRiy2TeaHyZfD2e1OYBzOCYp9n+W/j/JrQ YJIS9/Nb3bP7DUiLLinmPeXlXDJEpRTG2MDw8fo2NJJ8w6qoiM9bTuz3j3ajnuJ/YO PI+rrnUN6ZW3fnHGR+rZSYvPEK05jjUspEZ8QEfROzbfQa7CHGM1Qvy4N1S+OIc0zI zT1roCj/Wsx7bJBtb1Wnmnn6ItUaBa5yH4tMHI0eW+n0vF0+THuVPoMalLHmS9snKu fxW4CWQes0cFADmDsNsmedcjGNK+O6KU3C/v3hgKJOAYDJJvnhyulQPM21Ptd40CEV D/pytc5YrvhqQ== Message-ID: <39e1a740-1126-47d0-b5dd-d711c04c6af0@kernel.org> Date: Tue, 9 Jun 2026 16:18:10 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 00/12] Optimize anonymous large folio unmapping To: Dev Jain , akpm@linux-foundation.org, ljs@kernel.org, chrisl@kernel.org, kasong@tencent.com, hughd@google.com, liam@infradead.org Cc: riel@surriel.com, vbabka@kernel.org, harry@kernel.org, jannh@google.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, rppt@kernel.org, surenb@google.com, mhocko@suse.com, qi.zheng@linux.dev, shakeel.butt@linux.dev, baohua@kernel.org, axelrasmussen@google.com, yuanchu@google.com, weixugc@google.com, shikemeng@huaweicloud.com, nphamcs@gmail.com, bhe@redhat.com, youngjun.park@lge.com, baolin.wang@linux.alibaba.com, pfalcato@suse.de, ryan.roberts@arm.com, anshuman.khandual@arm.com References: <20260526063635.61721-1-dev.jain@arm.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 5/26/26 08:36, Dev Jain wrote: > Speed up unmapping of anonymous large folios by clearing the ptes, and > setting swap ptes, in one go. > > The following benchmark (stolen from Barry at [1]) is used to measure the > time taken to swapout 256M worth of memory backed by 64K large folios: I suggest sending out patch #1->#3 ahead of times as separate cleanups, so we get more targeted review for them. -- Cheers, David