From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755252AbeDZT2Y (ORCPT ); Thu, 26 Apr 2018 15:28:24 -0400 Received: from mx2.suse.de ([195.135.220.15]:39660 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752000AbeDZT2X (ORCPT ); Thu, 26 Apr 2018 15:28:23 -0400 Date: Thu, 26 Apr 2018 21:28:18 +0200 From: Michal Hocko To: "Eric W. Biederman" Cc: Kirill Tkhai , akpm@linux-foundation.org, peterz@infradead.org, oleg@redhat.com, viro@zeniv.linux.org.uk, mingo@kernel.org, paulmck@linux.vnet.ibm.com, keescook@chromium.org, riel@redhat.com, tglx@linutronix.de, kirill.shutemov@linux.intel.com, marcos.souza.org@gmail.com, hoeun.ryu@gmail.com, pasha.tatashin@oracle.com, gs051095@gmail.com, dhowells@redhat.com, rppt@linux.vnet.ibm.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH 0/4] exit: Make unlikely case in mm_update_next_owner() more scalable Message-ID: <20180426192818.GX17484@dhcp22.suse.cz> References: <152473763015.29458.1131542311542381803.stgit@localhost.localdomain> <20180426130700.GP17484@dhcp22.suse.cz> <87efj2q6sq.fsf@xmission.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87efj2q6sq.fsf@xmission.com> User-Agent: Mutt/1.9.4 (2018-02-28) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu 26-04-18 11:19:33, Eric W. Biederman wrote: > Michal Hocko writes: > > > I've had a patch to remove owner few years back. It needed some work > > to finish but maybe that would be a better than try to make > > non-scalable thing suck less. > > I have a question. Would it be reasonable to just have a mm->memcg? > That would appear to be the simplest solution to the problem. I do not remember details. Have to re-read the whole thing again. Hope to get to this soon but with the current jet lag and backlog from the LSFMM I rather not promis anything. Going with mm->memcg would be the most simple of course but I have a very vague recollection that it was not possible. Maybe I misremember... -- Michal Hocko SUSE Labs