Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1163017Ab3DEWST (ORCPT ); Fri, 5 Apr 2013 18:18:19 -0400 Received: from mail-we0-f169.google.com ([74.125.82.169]:33550 "EHLO mail-we0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1162999Ab3DEWSP (ORCPT ); Fri, 5 Apr 2013 18:18:15 -0400 Message-ID: <515F4DA3.2000000@suse.cz> Date: Sat, 06 Apr 2013 00:18:11 +0200 From: Jiri Slaby User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:19.0) Gecko/20130124 Thunderbird/19.0 MIME-Version: 1.0 To: Mel Gorman , "Theodore Ts'o" CC: linux-ext4@vger.kernel.org, LKML , Linux-MM Subject: Re: Excessive stall times on ext4 in 3.9-rc2 References: <20130402142717.GH32241@suse.de> <20130402150651.GB31577@thunk.org> <20130402151436.GC31577@thunk.org> <20130403101925.GA7341@suse.de> In-Reply-To: <20130403101925.GA7341@suse.de> X-Enigmail-Version: 1.6a1pre Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1620 Lines: 38 On 04/03/2013 12:19 PM, Mel Gorman wrote: > On Tue, Apr 02, 2013 at 11:14:36AM -0400, Theodore Ts'o wrote: >> On Tue, Apr 02, 2013 at 11:06:51AM -0400, Theodore Ts'o wrote: >>> >>> Can you try 3.9-rc4 or later and see if the problem still persists? >>> There were a number of ext4 issues especially around low memory >>> performance which weren't resolved until -rc4. >> >> Actually, sorry, I took a closer look and I'm not as sure going to >> -rc4 is going to help (although we did have some ext4 patches to fix a >> number of bugs that flowed in as late as -rc4). >> > > I'm running with -rc5 now. I have not noticed much interactivity problems > as such but the stall detection script reported that mutt stalled for > 20 seconds opening an inbox and imapd blocked for 59 seconds doing path > lookups, imaps blocked again for 12 seconds doing an atime update, an RSS > reader blocked for 3.5 seconds writing a file. etc. > > There has been no reclaim activity in the system yet and 2G is still free > so it's very unlikely to be a page or slab reclaim problem. 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. 3.5G out of 6G memory used, the rest is I/O cache. I have 7200RPM disks in my desktop. -- js suse labs -- 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/