From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Date: Fri, 15 Jul 2016 15:59:56 +0200 From: Peter Zijlstra To: Topi Miettinen Cc: linux-kernel@vger.kernel.org, Jonathan Corbet , Tony Luck , Fenghua Yu , Alexander Graf , Paolo Bonzini , Radim Kr??m???? , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" , Doug Ledford , Sean Hefty , Hal Rosenstock , Mike Marciniszyn , Dennis Dalessandro , Christian Benvenuti , Dave Goodell , Sudeep Dutt , Ashutosh Dixit , Alex Williamson , Alexander Viro , Tejun Heo , Li Zefan , Johannes Weiner , Alexei Starovoitov , Arnaldo Carvalho de Melo , Alexander Shishkin , Balbir Singh , Markus Elfring , "David S. Miller" , Nicolas Dichtel , Andrew Morton , Konstantin Khlebnikov , Jiri Slaby , Cyrill Gorcunov , Michal Hocko , Vlastimil Babka , Dave Hansen , Greg Kroah-Hartman , Dan Carpenter , Michael Kerrisk , "Kirill A. Shutemov" , Marcus Gelderie , Vladimir Davydov , Joe Perches , Frederic Weisbecker , Andrea Arcangeli , "Eric W. Biederman" , Andi Kleen , Oleg Nesterov , Stas Sergeev , Amanieu d'Antras , Richard Weinberger , Wang Xiaoqiang , Helge Deller , Mateusz Guzik , Alex Thorlton , Ben Segall , John Stultz , Rik van Riel , Eric B Munson , Alexey Klimov , Chen Gang , Andrey Ryabinin , David Rientjes , Hugh Dickins , Alexander Kuleshov , "open list:DOCUMENTATION" , "open list:IA64 (Itanium) PLATFORM" , "open list:KERNEL VIRTUAL MACHINE (KVM) FOR POWERPC" , "open list:KERNEL VIRTUAL MACHINE (KVM)" , "open list:LINUX FOR POWERPC (32-BIT AND 64-BIT)" , "open list:INFINIBAND SUBSYSTEM" , "open list:FILESYSTEMS (VFS and infrastructure)" , "open list:CONTROL GROUP (CGROUP)" , "open list:BPF (Safe dynamic programs and tools)" , "open list:MEMORY MANAGEMENT" Subject: Re: [PATCH 00/14] Present useful limits to user (v2) Message-ID: <20160715135956.GA3115@twins.programming.kicks-ass.net> References: <1468578983-28229-1-git-send-email-toiwoton@gmail.com> <20160715124330.GR30154@twins.programming.kicks-ass.net> <28b4b919-4f50-d9f6-c5e1-d1e92ea1ba1c@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <28b4b919-4f50-d9f6-c5e1-d1e92ea1ba1c@gmail.com> Sender: owner-linux-mm@kvack.org List-ID: On Fri, Jul 15, 2016 at 01:52:48PM +0000, Topi Miettinen wrote: > On 07/15/16 12:43, Peter Zijlstra wrote: > > On Fri, Jul 15, 2016 at 01:35:47PM +0300, Topi Miettinen wrote: > >> Hello, > >> > >> There are many basic ways to control processes, including capabilities, > >> cgroups and resource limits. However, there are far fewer ways to find out > >> useful values for the limits, except blind trial and error. > >> > >> This patch series attempts to fix that by giving at least a nice starting > >> point from the highwater mark values of the resources in question. > >> I looked where each limit is checked and added a call to update the mark > >> nearby. > > > > And how is that useful? Setting things to the high watermark is > > basically the same as not setting the limit at all. > > What else would you use, too small limits? That question doesn't make sense. What's the point of setting a limit if it ends up being the same as no-limit (aka unlimited). If you cannot explain; and you have not so far; what use these values are, why would we look at the patches. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org