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[147.75.80.249]) by mx.google.com with ESMTPS id kl10-20020a170907994a00b00a55be94ff35si3009190ejc.1025.2024.04.24.04.02.26 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 24 Apr 2024 04:02:26 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel+bounces-156773-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.80.249 as permitted sender) client-ip=147.75.80.249; Authentication-Results: mx.google.com; arc=pass (i=1); spf=pass (google.com: domain of linux-kernel+bounces-156773-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.80.249 as permitted sender) smtp.mailfrom="linux-kernel+bounces-156773-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=arm.com Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by am.mirrors.kernel.org (Postfix) with ESMTPS id B554A1F22D31 for ; Wed, 24 Apr 2024 11:02:26 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 89E8115991B; Wed, 24 Apr 2024 11:02:17 +0000 (UTC) Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 0EDDD1598FE; Wed, 24 Apr 2024 11:02:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713956537; cv=none; b=p9cvVf35A4VrkvukOw7ttwT4JhU3VVN89I2VrqFmFPDn9Jxye3/+/wTn595BAE2e4iLWjx/1fxa7gdxBQr/Thd0bBHDSKAkUtLcVoltpD9TIpsT9ldZJt6gwNpejS3fRnpHfkIStBO22ZHK6a8VxZuyN/X+vFctgKLD1CUhVaPc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713956537; c=relaxed/simple; bh=eNzHajL0qQDlqtt6urcBwZZSf51/gpF1z416bIflBLg=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Qz1SimuIlQD3wkd5qUt+VYu1KZa0wG7vz4TnAVKstL5AUVL7vaUVvTgJhKCydVJL7dLc5j2Ii+02kKX3Lw6oVzXkIDFCjzzQS9WdVK0/GpZX+ZUyf8poFiYaVX4Zlgajm/F5t95m7a08uLrYJx98fthg16fxptbPcME7BPSbSnU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 Received: by smtp.kernel.org (Postfix) with ESMTPSA id DB773C113CE; Wed, 24 Apr 2024 11:02:13 +0000 (UTC) Date: Wed, 24 Apr 2024 12:02:11 +0100 From: Catalin Marinas To: Ryan Roberts Cc: David Hildenbrand , Shivansh Vij , Mike Rapoport , Will Deacon , Andrew Morton , Shuah Khan , Joey Gouly , Ard Biesheuvel , Mark Rutland , Anshuman Khandual , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux-kselftest@vger.kernel.org" Subject: Re: [PATCH v1 0/5] arm64/mm: uffd write-protect and soft-dirty tracking Message-ID: References: <20240419074344.2643212-1-ryan.roberts@arm.com> <24999e38-e4f7-4616-8eae-dfdeba327558@arm.com> <9e73ad2f-198c-4ab5-a462-2e238edd9b34@arm.com> <3e14ad32-17da-49fd-a4ac-8f87f9151dba@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3e14ad32-17da-49fd-a4ac-8f87f9151dba@arm.com> On Wed, Apr 24, 2024 at 11:39:23AM +0100, Ryan Roberts wrote: > - Have a chat with Catalin about appetite for soft-dirty on arm64; But likely > that will be left here until/unless there is clear justificaiton that the > use case cannot be met with uffd-wp. I agree, I wouldn't use the last software bit if there's a way for CRIU to eventually use uffd-wp. -- Catalin