From mboxrd@z Thu Jan 1 00:00:00 1970 From: Johannes Weiner Subject: Re: [PATCH 5/8] mm: memcontrol: account socket memory on unified hierarchy Date: Fri, 6 Nov 2015 12:45:17 -0500 Message-ID: <20151106174517.GA9315@cmpxchg.org> References: <20151029152546.GG23598@dhcp22.suse.cz> <20151029161009.GA9160@cmpxchg.org> <20151104104239.GG29607@dhcp22.suse.cz> <20151104195037.GA6872@cmpxchg.org> <20151105144002.GB15111@dhcp22.suse.cz> <20151105205522.GA1067@cmpxchg.org> <20151105225200.GA5432@cmpxchg.org> <20151106105724.GG4390@dhcp22.suse.cz> <20151106161953.GA7813@cmpxchg.org> <20151106164657.GL4390@dhcp22.suse.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: David Miller , akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org, vdavydov-5HdwGun5lf+gSpxsJD1C4w@public.gmane.org, tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org, cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Michal Hocko Return-path: Content-Disposition: inline In-Reply-To: <20151106164657.GL4390-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org> Sender: cgroups-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: netdev.vger.kernel.org On Fri, Nov 06, 2015 at 05:46:57PM +0100, Michal Hocko wrote: > The basic problem was that the Delegate feature has been backported to > our systemd package without further consideration and that has > invalidated a lot of performance testing because some resource > controllers have measurable effects on those benchmarks. You're talking about a userspace bug. No amount of fragmenting and layering and opt-in in the kernel's runtime configuration space is going to help you if you screw up and enable it all by accident. > > All I read here is vague inflammatory language to spread FUD. > > I was merely pointing out that memory controller might be enabled without > _user_ actually even noticing because the controller wasn't enabled > explicitly. I haven't blamed anybody for that. Why does that have anything to do with how we design our interface? We can't do more than present a sane interface in good faith and lobby userspace projects if we think they misuse it.