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 5B632CD98CC for ; Thu, 11 Jun 2026 13:49:43 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 92EE06B0005; Thu, 11 Jun 2026 09:49:42 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 8DF596B0088; Thu, 11 Jun 2026 09:49:42 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 7F51B6B008C; Thu, 11 Jun 2026 09:49:42 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 6B3446B0005 for ; Thu, 11 Jun 2026 09:49:42 -0400 (EDT) Received: from smtpin14.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 176A54069C for ; Thu, 11 Jun 2026 13:49:42 +0000 (UTC) X-FDA: 84867764604.14.E2E18D4 Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf17.hostedemail.com (Postfix) with ESMTP id 5829F4000F for ; Thu, 11 Jun 2026 13:49:40 +0000 (UTC) Authentication-Results: imf17.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=IkKy257r; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf17.hostedemail.com: domain of osalvador@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=osalvador@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1781185780; 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-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=TEvuJlQ7/byK5XxsbYYwUbRy15W0fhVCxzo1M/PBXMQ=; b=Lr2FxaaXZ7oXsvjNhI3PfTO/3gYJYrXBkefHWQ1uT4OGmoLFTtFkQBXrWiwMQsmmliy90x IKGxCFzXVBSUgY2XaPksWpCxh2hU/U3Ighy5mpkufWAoxDCPHYe7TxjFbFTL+PhOTC4ETe 0dmUxtjuLhw2FnnViSwsa2bTJbPk7y8= ARC-Authentication-Results: i=1; imf17.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=IkKy257r; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf17.hostedemail.com: domain of osalvador@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=osalvador@kernel.org ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1781185780; b=wuE11hI49lPxRorpTuGLqTlGcQ0QWoFtB/hFS/u9FnDlpx6WuWhuTM2qMJxDjFuRazwwYw HLG+ifrvP4GCt2R/CwOVpyU1OTGTBUblSihWyTuqR2vt3HByzK06UFmJxEhGHiiJl1PcpD 5lkKZeXuLqbjwWidN85/VKPj+eOziVE= Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 22CC14330D; Thu, 11 Jun 2026 13:49:39 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1C96F1F00899; Thu, 11 Jun 2026 13:49:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1781185779; bh=TEvuJlQ7/byK5XxsbYYwUbRy15W0fhVCxzo1M/PBXMQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=IkKy257r9V3Y4dqrKhFosnHxl/O+VSLLwvZhs9NCu0ZnacHR2U0oyhquj+b8cv0Nb pN963rM/ZsmLuBz25lQwn8W1cFTDW0tXfOgaHa7kzli1wOKRvnvNCTh96COOtxiXG0 3cHIpfTPwZCXaGVmAXBlmKSVqWZKNJ+FnGPA8/EUc7c9DTeY1SkK5Egf+aFYwJZPDS Y2wsSrp1m/yOhR2z6j30HHuV4uSZ8zCMZj+zsUrE4l/i0LsP22XJYCJhreCnA3Myx9 jCs6fnM1yjp/CY0nf2hAOEmqV6H2FiVq6Xlj3SRfbUDZAvLQzvu4SwkSNqlp9mBl+N TFFJU68m2/qxQ== Date: Thu, 11 Jun 2026 15:49:31 +0200 From: "Oscar Salvador (SUSE)" To: "David Hildenbrand (Arm)" Cc: "David S. Miller" , Andreas Larsson , Andrew Morton , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jann Horn , Peter Zijlstra , sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH 2/3] mm: drop pte_clear_not_present_full() Message-ID: References: <20260611-clear_not_present_full_ptes-v1-0-49865fc82629@kernel.org> <20260611-clear_not_present_full_ptes-v1-2-49865fc82629@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260611-clear_not_present_full_ptes-v1-2-49865fc82629@kernel.org> X-Rspam-User: X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 5829F4000F X-Stat-Signature: je57xfjsrn1sy19p8o8z91s7iu73stbx X-HE-Tag: 1781185780-544192 X-HE-Meta: U2FsdGVkX18qHQ/t+XqyET8J19rpvCpA2an3uWwMp1F6KEHFi0SF+hhmUckQnoaSp0zi9y4TMUZNlBb+qhLyRV9Z0Nh1eVU8TRaNmTZxIq57oLdSexKe8Xi4YxcdMQNDCkbkhoWA3uqgDXHPsW0ofSXCJzdd5NX/948I+h1Cgp2ofqdR3puKteG2+QhoxKUwlU6SDnBFhiK5ij5FrhlgYspCGrdhh8CPgta9RbiH1BzIdQ73SB9JnwlEEHzRW7cmcbHDRIvHrRJwY5i0UNkTHUEEselv82iRka7QK2RQbqDX3jLlfJqj7PGtYmEmxB5fy84cQTeIuJraGuCIAUknPsrmdeWNcjOrsGZ5bENA4T5lh+QSkGgs/5ahyeXTiv+FxgB+4BDsjCYJRTTrTaxQL6yLf52P+FLT9zWYRtiv5Dy9Ui3Ln1osYSbzExrybA3bYzO5slZ3t08B8womWKs7M1JfNpqRtH4tb/25QLPhkp1s8+463SyRrbKtA6s+lT+z2gaRp+UFZuaC1LNtMbI3IwLhLptfxRrTWAJthL1XSS75LACReWiBpL1Ovm4EuGCPEwLJu8t2k42exVWbI8AEEIY8lihqgUF/SuXmLYaAlyNf99E31O3OQrJAxfvXdyMd6JILBxWBu2QAPjFozfWQkQYv/Zw4vKlbS/LUvz4kgPbI/DVP5xAOoi7rVVfuIuLahuyQOtSWppcSn0nabv/rtSyCxxzRwRrCWEq5pOkSeuo8ekZCSRM5BIrMghXbTSm0ViQ5JlvhKpc+lGW6pk5Kx4HFAMvXQVz9Ofbg8Rm8iMavqjrmWmPCEei0jN6f6jpdqfEHBPEX/UHT1Dsf7amokihQJxbqi+d/Pg3Pic0bCoCuk+TFUQuPIMrW0tY+Kvgf2dptV2vUClBAM6sszSMzSe2fi+ofV+W9wAlUwefF7TrfSX2LoGq7k4Bs01Y7dV5nc0s5k6OKWIZBPKwYv3N 1K+GvlUL p7pK37kIvkWIP1ibvy6CE1QaZqiqzKqg4PvjOieRm/huXitbH6HLZasNr19h0DMFlBjrBPHCwi+lUQSE3mT/BTvodeR3mGRsuruYhBwPysRwszaFlwVo0mgHNLqnBZGreSeVo3w91oBOr9HPfaMMUPM0MmKdPt43jGJ3P+fiGJMUarUh49lDbFLdqWRKy+f9XCjIQKEy0mGTH0QVjA7REYyV6e0D4wdS3Jo1fVnM6Vd+Ne30AMVTvqj1zL9fxuWjFjXfh5srtPnls6+CNem2CuQQfcvYEhMbV57kb Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, Jun 11, 2026 at 01:50:48PM +0200, David Hildenbrand (Arm) wrote: > In general, there is no good reason to do anything special when clearing > non-present PTEs. > > In theory, HW that does have to invalidate TLBs for non-present PTEs could > benefit from a "full" parameter, but fortunately That would be on arches like arm64 where it can cache non-present entries, right? Then, we could signal a global invalidation instead of doing per page. > pte_clear_not_present_full() is not wired up anymore ... and there would > have to be something very convincing for us to care about that to re-add > it. > > So, let's just use pte_clear() directly now. > > Signed-off-by: David Hildenbrand (Arm) Reviewed-by: Oscar Salvador (SUSE) -- Oscar Salvador SUSE Labs