From: Theodore Ts'o Subject: Re: Excessive stall times on ext4 in 3.9-rc2 Date: Fri, 5 Apr 2013 19:16:35 -0400 Message-ID: <20130405231635.GA6521@thunk.org> References: <20130402142717.GH32241@suse.de> <20130402150651.GB31577@thunk.org> <20130402151436.GC31577@thunk.org> <20130403101925.GA7341@suse.de> <515F4DA3.2000000@suse.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Mel Gorman , linux-ext4@vger.kernel.org, LKML , Linux-MM To: Jiri Slaby Return-path: Received: from li9-11.members.linode.com ([67.18.176.11]:59685 "EHLO imap.thunk.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757321Ab3DEXRX (ORCPT ); Fri, 5 Apr 2013 19:17:23 -0400 Content-Disposition: inline In-Reply-To: <515F4DA3.2000000@suse.cz> Sender: linux-ext4-owner@vger.kernel.org List-ID: On Sat, Apr 06, 2013 at 12:18:11AM +0200, Jiri Slaby wrote: > Ok, so now I'm runnning 3.9.0-rc5-next-20130404, it's not that bad, but > it still sucks. Updating a kernel in a VM still results in "Your system > is too SLOW to play this!" by mplayer and frame dropping. What was the first kernel where you didn't have the problem? Were you using the 3.8 kernel earlier, and did you see the interactivity problems there? What else was running in on your desktop at the same time? How was the file system mounted, and can you send me the output of dumpe2fs -h /dev/XXX? Oh, and what options were you using to when you kicked off the VM? The other thing that would be useful was to enable the jbd2_run_stats tracepoint and to send the output of the trace log when you notice the interactivity problems. Thanks, - Ted