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 X-Spam-Level: X-Spam-Status: No, score=-3.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_NEOMUTT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4C10EC4360F for ; Tue, 2 Apr 2019 23:45:50 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A8A4320882 for ; Tue, 2 Apr 2019 23:45:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A8A4320882 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=stgolabs.net Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 44Ym6z32vszDqQZ for ; Wed, 3 Apr 2019 10:45:47 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=softfail (mailfrom) smtp.mailfrom=stgolabs.net (client-ip=195.135.220.15; helo=mx1.suse.de; envelope-from=dave@stgolabs.net; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=stgolabs.net Received: from mx1.suse.de (mx2.suse.de [195.135.220.15]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 44Ym5B427WzDqMF for ; Wed, 3 Apr 2019 10:44:12 +1100 (AEDT) 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 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-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kvm@vger.kernel.org, Alan Tull , Alexey Kardashevskiy , linux-fpga@vger.kernel.org, linux-kernel@vger.kernel.org, kvm-ppc@vger.kernel.org, Daniel Jordan , linux-mm@kvack.org, Alex Williamson , Moritz Fischer , Christoph Lameter , linuxppc-dev@lists.ozlabs.org, Wu Hao Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" 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