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[209.85.208.177]) by smtp.gmail.com with ESMTPSA id n16sm2449444lfl.35.2018.12.03.10.20.14 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 03 Dec 2018 10:20:14 -0800 (PST) Received: by mail-lj1-f177.google.com with SMTP id x85-v6so12340568ljb.2 for ; Mon, 03 Dec 2018 10:20:14 -0800 (PST) X-Received: by 2002:a2e:994:: with SMTP id 142-v6mr9519399ljj.120.1543861211867; Mon, 03 Dec 2018 10:20:11 -0800 (PST) MIME-Version: 1.0 References: <20181127062503.GH6163@shao2-debian> <20181127205737.GI16136@redhat.com> <87tvk1yjkp.fsf@yhuang-dev.intel.com> <20181203181456.GK31738@dhcp22.suse.cz> In-Reply-To: <20181203181456.GK31738@dhcp22.suse.cz> From: Linus Torvalds Date: Mon, 3 Dec 2018 10:19:55 -0800 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [LKP] [mm] ac5b2c1891: vm-scalability.throughput -61.3% regression To: mhocko@kernel.org Cc: ying.huang@intel.com, Andrea Arcangeli , s.priebe@profihost.ag, mgorman@techsingularity.net, Linux List Kernel Mailing , alex.williamson@redhat.com, lkp@01.org, David Rientjes , kirill@shutemov.name, Andrew Morton , zi.yan@cs.rutgers.edu, Vlastimil Babka Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Dec 3, 2018 at 10:15 AM Michal Hocko wrote: > > The thing is that there is no universal win here. There are two > different types of workloads and we cannot satisfy both. Ok, if that's the case, then I'll just revert the commit. Michal, our rules are very simple: we don't generate regressions. It's better to have old reliable behavior than to start creating *new* problems. Linus From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: multipart/mixed; boundary="===============8570347319627538751==" MIME-Version: 1.0 From: Linus Torvalds To: lkp@lists.01.org Subject: Re: [mm] ac5b2c1891: vm-scalability.throughput -61.3% regression Date: Mon, 03 Dec 2018 10:19:55 -0800 Message-ID: In-Reply-To: <20181203181456.GK31738@dhcp22.suse.cz> List-Id: --===============8570347319627538751== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable On Mon, Dec 3, 2018 at 10:15 AM Michal Hocko wrote: > > The thing is that there is no universal win here. There are two > different types of workloads and we cannot satisfy both. Ok, if that's the case, then I'll just revert the commit. Michal, our rules are very simple: we don't generate regressions. It's better to have old reliable behavior than to start creating *new* problems. Linus --===============8570347319627538751==--