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[217.140.101.70]) by mx.google.com with ESMTP id p48si11779330edc.373.2019.05.28.08.56.54 for ; Tue, 28 May 2019 08:56:54 -0700 (PDT) Received-SPF: pass (google.com: domain of dave.martin@arm.com designates 217.140.101.70 as permitted sender) client-ip=217.140.101.70; Authentication-Results: mx.google.com; spf=pass (google.com: domain of dave.martin@arm.com designates 217.140.101.70 as permitted sender) smtp.mailfrom=Dave.Martin@arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 8540E341; Tue, 28 May 2019 08:56:53 -0700 (PDT) Received: from e103592.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.72.51.249]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id C9F273F59C; Tue, 28 May 2019 08:56:47 -0700 (PDT) Date: Tue, 28 May 2019 16:56:45 +0100 From: Dave Martin To: Catalin Marinas Cc: Andrew Murray , Mark Rutland , kvm@vger.kernel.org, Christian Koenig , Szabolcs Nagy , Will Deacon , dri-devel@lists.freedesktop.org, linux-mm@kvack.org, Lee Smith , linux-kselftest@vger.kernel.org, Vincenzo Frascino , Jacob Bramley , Leon Romanovsky , linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, Evgeniy Stepanov , linux-media@vger.kernel.org, Kees Cook , Ruben Ayrapetyan , Andrey Konovalov , Kevin Brodsky , Alex Williamson , Mauro Carvalho Chehab , Dmitry Vyukov , Kostya Serebryany , Greg Kroah-Hartman , Felix Kuehling , linux-kernel@vger.kernel.org, Jens Wiklander , Ramana Radhakrishnan , Alexander Deucher , Andrew Morton , Robin Murphy , Yishai Hadas , Luc Van Oostenryck Subject: Re: [PATCH v15 05/17] arms64: untag user pointers passed to memory syscalls Message-ID: <20190528155644.GD28398@e103592.cambridge.arm.com> References: <00eb4c63fefc054e2c8d626e8fedfca11d7c2600.1557160186.git.andreyknvl@google.com> <20190527143719.GA59948@MBP.local> <20190528145411.GA709@e119886-lin.cambridge.arm.com> <20190528154057.GD32006@arrakis.emea.arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190528154057.GD32006@arrakis.emea.arm.com> User-Agent: Mutt/1.5.23 (2014-03-12) 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: On Tue, May 28, 2019 at 04:40:58PM +0100, Catalin Marinas wrote: [...] > My thoughts on allowing tags (quick look): > > brk - no [...] > mlock, mlock2, munlock - yes > mmap - no (we may change this with MTE but not for TBI) [...] > mprotect - yes I haven't following this discussion closely... what's the rationale for the inconsistencies here (feel free to refer me back to the discussion if it's elsewhere). Cheers ---Dave