From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:22595 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753438AbaIAQDB (ORCPT ); Mon, 1 Sep 2014 12:03:01 -0400 Message-ID: <540498AF.6030109@fb.com> Date: Mon, 1 Sep 2014 12:02:55 -0400 From: Chris Mason MIME-Version: 1.0 To: john terragon , Subject: Re: kernel 3.17-rc3: task rsync:2524 blocked for more than 120 seconds References: In-Reply-To: Content-Type: text/plain; charset="ISO-8859-1" Sender: linux-btrfs-owner@vger.kernel.org List-ID: On 09/01/2014 09:33 AM, john terragon wrote: > Hi. > > I'm not sure if this is related to the hung task problem that I've > been seeing in this ml for a while. But I've been having this > seemingly related problem with 3.15, 3.16 and now 3.17-rc3 (which, if > I'm not mistaken, should have a fix for the hung task problem). So > here it is: I have a usb flash drive with btrfs (on top of dmcrypt) > usually mounted with these options > > rw,noatime,compress-force=zlib,ssd,space_cache,autodefrag > > When I try to rsync the usb flash drive I get a truck-load of "INFO: > task rsync:2524 blocked for more than 120 seconds" as you can see > below. > The rsync process crawls into an almost complete stop and I can't even > kill it. I know the usb key is OK because I've tried the same thing > with ext4 and xfs and everything went fine. This does have all of our fixes for hangs. Does the rsync eventually complete? Or do we just sit there forever? -chris