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[195.135.220.15]) by mx.google.com with ESMTPS id m26si3455097eds.252.2019.04.02.16.44.08 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 02 Apr 2019 16:44:08 -0700 (PDT) Received-SPF: softfail (google.com: domain of transitioning dave@stgolabs.net does not designate 195.135.220.15 as permitted sender) client-ip=195.135.220.15; Authentication-Results: mx.google.com; spf=softfail (google.com: domain of transitioning dave@stgolabs.net does not designate 195.135.220.15 as permitted sender) smtp.mailfrom=dave@stgolabs.net X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 1ED2DAC8D; Tue, 2 Apr 2019 23:44:08 +0000 (UTC) Date: Tue, 2 Apr 2019 16:43:57 -0700 From: Davidlohr Bueso To: Andrew Morton Cc: Daniel Jordan , Alan Tull , Alexey Kardashevskiy , Alex Williamson , Benjamin Herrenschmidt , Christoph Lameter , Michael Ellerman , Moritz Fischer , Paul Mackerras , Wu Hao , linux-mm@kvack.org, kvm@vger.kernel.org, kvm-ppc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-fpga@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/6] mm: change locked_vm's type from unsigned long to atomic64_t Message-ID: <20190402234357.tn3tik4r7k6nbrau@linux-r8p5> Mail-Followup-To: Andrew Morton , Daniel Jordan , Alan Tull , Alexey Kardashevskiy , Alex Williamson , Benjamin Herrenschmidt , Christoph Lameter , Michael Ellerman , Moritz Fischer , Paul Mackerras , Wu Hao , linux-mm@kvack.org, kvm@vger.kernel.org, kvm-ppc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-fpga@vger.kernel.org, linux-kernel@vger.kernel.org References: <20190402204158.27582-1-daniel.m.jordan@oracle.com> <20190402204158.27582-2-daniel.m.jordan@oracle.com> <20190402150424.5cf64e19deeafa58fc6c1a9f@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: <20190402150424.5cf64e19deeafa58fc6c1a9f@linux-foundation.org> User-Agent: NeoMutt/20180323 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, 02 Apr 2019, Andrew Morton wrote: >Also, we didn't remove any down_write(mmap_sem)s from core code so I'm >thinking that the benefit of removing a few mmap_sem-takings from a few >obscure drivers (sorry ;)) is pretty small. afaik porting the remaining incorrect users of locked_vm to pinned_vm was the next step before this one, which made converting locked_vm to atomic hardly worth it. Daniel? Thanks, Davidlohr