From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from plane.gmane.org ([80.91.229.3]:55036 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752097AbbFZRMu (ORCPT ); Fri, 26 Jun 2015 13:12:50 -0400 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1Z8XBH-0008Gz-SG for linux-btrfs@vger.kernel.org; Fri, 26 Jun 2015 19:12:47 +0200 Received: from barriere.frankfurter-softwarefabrik.de ([217.11.197.1]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 26 Jun 2015 19:12:47 +0200 Received: from lvml by barriere.frankfurter-softwarefabrik.de with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 26 Jun 2015 19:12:47 +0200 To: linux-btrfs@vger.kernel.org From: Lutz Vieweg Subject: Re: [PATCH 0/4] btrfs: reduce block group cache writeout times during commit Date: Fri, 26 Jun 2015 19:12:37 +0200 Message-ID: References: <1428954759-1304912-1-git-send-email-clm@fb.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed In-Reply-To: Sender: linux-btrfs-owner@vger.kernel.org List-ID: Testing the patch took much longer than I anticipated due to pre-4.1-kernels being "too risky" for use on our servers, but now it's done and I can say: This patch, as integrated in linux-4.1, has successfully removed the lags. Thanks! Regards, Lutz Vieweg On 04/22/2015 06:09 PM, Lutz Vieweg wrote: > On 04/13/2015 09:52 PM, Chris Mason wrote: >> Large filesystems with lots of block groups can suffer long stalls during >> commit while we create and send down all of the block group caches. The >> more blocks groups dirtied in a transaction, the longer these stalls can be. >> Some workloads average 10 seconds per commit, but see peak times much higher. > > Since we see this problem very frequently on some shared development servers, > I will try to install this ASAP. > > Meanwhile, can anybody already tell success stories about successfully removing > lags by this patch? > > Regards, > > Lutz Vieweg > > -- > To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >