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[209.85.167.52]) by smtp.gmail.com with ESMTPSA id z16sm582545ljz.72.2019.09.24.08.34.36 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 24 Sep 2019 08:34:37 -0700 (PDT) Received: by mail-lf1-f52.google.com with SMTP id y127so1780844lfc.0 for ; Tue, 24 Sep 2019 08:34:36 -0700 (PDT) X-Received: by 2002:ac2:5c11:: with SMTP id r17mr2356677lfp.61.1569339276737; Tue, 24 Sep 2019 08:34:36 -0700 (PDT) MIME-Version: 1.0 References: <20190923153142.a7a7590798baebd3e1531083@linux-foundation.org> <20190923213153.62d56ab13a655aa7e2a583af@linux-foundation.org> <20190924074843.GC23050@dhcp22.suse.cz> In-Reply-To: <20190924074843.GC23050@dhcp22.suse.cz> From: Linus Torvalds Date: Tue, 24 Sep 2019 08:34:20 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: incoming To: Michal Hocko Cc: Andrew Morton , David Rientjes , Vlastimil Babka , Andrea Arcangeli , mm-commits@vger.kernel.org, Linux-MM Content-Type: text/plain; charset="UTF-8" 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, Sep 24, 2019 at 12:48 AM Michal Hocko wrote: > > The patch proposed by David is really non trivial wrt. potential side > effects. The thing is, that's not an argument when we know that the current state is garbage and has a lot of these non-trivial side effects that are bad. So the patch by David _fixes_ a non-trivial bad side effect. You can't then say "there may be other non-trivial side effects that I don't even know about" as an argument for saying it's bad. David at least has numbers and an argument for his patch. Linus