From mboxrd@z Thu Jan 1 00:00:00 1970 From: Serge Hallyn Subject: Re: [PATCH v2 00/28] memcg-aware slab shrinking Date: Mon, 1 Apr 2013 09:12:17 -0500 Message-ID: <20130401141217.GA9336@sergelap> References: <1364548450-28254-1-git-send-email-glommer@parallels.com> <20130401123843.GC5217@sergelap> <51598168.4050404@parallels.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Dave Shrinnker , containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, hughd-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org, Michal Hocko , linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org, Johannes Weiner , linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Andrew Morton To: Glauber Costa Return-path: Content-Disposition: inline In-Reply-To: <51598168.4050404-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org List-Id: linux-fsdevel.vger.kernel.org Quoting Glauber Costa (glommer-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org): > On 04/01/2013 04:38 PM, Serge Hallyn wrote: > > Quoting Glauber Costa (glommer-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org): > >> Hi, > >> > >> Notes: > >> ====== > >> > >> This is v2 of memcg-aware LRU shrinking. I've been testing it extensively > >> and it behaves well, at least from the isolation point of view. However, > >> I feel some more testing is needed before we commit to it. Still, this is > >> doing the job fairly well. Comments welcome. > > > > Do you have any performance tests (preferably with enough runs with and > > without this patchset to show 95% confidence interval) to show the > > impact this has? Certainly the feature sounds worthwhile, but I'm > > curious about the cost of maintaining this extra state. > > > > -serge > > > Not yet. I intend to include them in my next run. I haven't yet decided > on a set of tests to run (maybe just a memcg-contained kernel compile?) > > So if you have suggestions of what I could run to show this, feel free > to lay them down here. Perhaps mount a 4G tmpfs, copy kernel tree there, and build kernel on that tmpfs? -serge