Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760840AbbKTRde (ORCPT ); Fri, 20 Nov 2015 12:33:34 -0500 Received: from h2.hallyn.com ([78.46.35.8]:36938 "EHLO h2.hallyn.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759664AbbKTRdc (ORCPT ); Fri, 20 Nov 2015 12:33:32 -0500 Date: Fri, 20 Nov 2015 11:33:29 -0600 From: "Serge E. Hallyn" To: Octavian Purdila Cc: Seth Forshee , Richard Weinberger , Al Viro , "Eric W. Biederman" , linux-bcache@vger.kernel.org, device-mapper development , "linux-raid@vger.kernel.org" , "linux-mtd@lists.infradead.org" , linux-fsdevel , LSM , selinux@tycho.nsa.gov, Serge Hallyn , Andy Lutomirski , LKML , "Theodore Ts'o" Subject: Re: [PATCH v3 0/7] User namespace mount updates Message-ID: <20151120173329.GA20909@mail.hallyn.com> References: <20151117172551.GA108807@ubuntu-hedt> <20151117175506.GW22011@ZenIV.linux.org.uk> <20151117183444.GB108807@ubuntu-hedt> <20151117192141.GD108807@ubuntu-hedt> <564B8A20.9090607@nod.at> <20151119152347.GA45540@ubuntu-hedt> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1576 Lines: 36 On Thu, Nov 19, 2015 at 06:19:10PM +0200, Octavian Purdila wrote: > On Thu, Nov 19, 2015 at 5:23 PM, Seth Forshee > > And for the second: > > > > stress-ng --class filesystem --seq 0 -v -t 60 > > > > There really wasn't anything interesting in the lklfuse output for the > > first run, but for the second run I pasted the output here: > > http://paste.ubuntu.com/13346993/ > > lklfuse allocates a fixed 100MB to the kernel and this is probably not > enough. For the short term I can add a parameter to lklfuse that > allows the user to specify the amount of memory to allocate to lkl. A > better fix would probably be to dynamically adjust the memory size of > lkl. I am thinking of using the ballon virtio driver or the memory > hotplug infrastructure. Any other suggestions? Hi Octavian, Like Seth said this was very nice to install and run. But I think I'm doing something wrong. I cloned the lkl/linux git tree into a 9G ext4 loopback file, both one mounted with lkl and one mounted as loopback. The results were worse than I expected - loopback was 0m10.078s for clone and 0m0.877s for rm -rf; lkl was 5m5.625s for clone and 0m44.332s for rm -rf. I assume this has to do with the 100MB buffer and subsequent thrashing? How should I tune this to make it perform better? No crashes from this, though. thanks, -serge -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/