From mboxrd@z Thu Jan 1 00:00:00 1970 From: Frederik Thuysbaert Subject: Re: [Xen-devel] Xen blktap driver for Ceph RBD : Anybody wants to test ? :p Date: Wed, 14 Aug 2013 10:47:24 +0200 Message-ID: <520B441C.8000305@gmail.com> References: <20130419064524.GQ11427@reaktio.net> <6035A0D088A63A46850C3988ED045A4B62D9DA64@BITCOM1.int.sbss.com.au> <6035A0D088A63A46850C3988ED045A4B62E86BF8@BITCOM1.int.sbss.com.au> <6035A0D088A63A46850C3988ED045A4B62F433FE@BITCOM1.int.sbss.com.au> <6035A0D088A63A46850C3988ED045A4B62F43442@BITCOM1.int.sbss.com.au> <6035A0D088A63A46850C3988ED045A4B63891798@BITCOM1.int.sbss.com.au> <6035A0D088A63A46850C3988ED045A4B6389552A@BITCOM1.int.sbss.com.au> <520A4945.1030907@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-we0-f174.google.com ([74.125.82.174]:42880 "EHLO mail-we0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759505Ab3HNIr2 (ORCPT ); Wed, 14 Aug 2013 04:47:28 -0400 Received: by mail-we0-f174.google.com with SMTP id q54so7377252wes.5 for ; Wed, 14 Aug 2013 01:47:26 -0700 (PDT) In-Reply-To: Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Sylvain Munaut Cc: James Harper , =?ISO-8859-1?Q?Pasi_K?= =?ISO-8859-1?Q?=E4rkk=E4inen?= , "ceph-devel@vger.kernel.org" , "xen-devel@lists.xen.org" On 13-08-13 17:39, Sylvain Munaut wrote: > > It's actually strange that it changes anything at all. > > Can you try adding a ERROR("HERE\n"); in that error path processing > and check syslog to see if it's triggered at all ? > > A traceback would be great if you can get a core file. And possibly > compile tapdisk with debug symbols. When halting the domU after the errors, I get the following in dom0 syslog: Aug 14 10:43:57 xen-001 kernel: [ 5041.338756] INFO: task tapdisk:9690 blocked for more than 120 seconds. Aug 14 10:43:57 xen-001 kernel: [ 5041.338817] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Aug 14 10:43:57 xen-001 kernel: [ 5041.338903] tapdisk D ffff8800bf213780 0 9690 1 0x00000000 Aug 14 10:43:57 xen-001 kernel: [ 5041.338908] ffff8800b4b0e730 0000000000000246 ffff880000000000 ffffffff8160d020 Aug 14 10:43:57 xen-001 kernel: [ 5041.338912] 0000000000013780 ffff8800b4ebffd8 ffff8800b4ebffd8 ffff8800b4b0e730 Aug 14 10:43:57 xen-001 kernel: [ 5041.338916] ffff8800b4d36190 0000000181199c37 ffff8800b5798c00 ffff8800b5798c00 Aug 14 10:43:57 xen-001 kernel: [ 5041.338921] Call Trace: Aug 14 10:43:57 xen-001 kernel: [ 5041.338929] [] ? blktap_device_destroy_sync+0x85/0x9b [blktap] Aug 14 10:43:57 xen-001 kernel: [ 5041.338936] [] ? add_wait_queue+0x3c/0x3c Aug 14 10:43:57 xen-001 kernel: [ 5041.338940] [] ? blktap_ring_release+0x10/0x2d [blktap] Aug 14 10:43:57 xen-001 kernel: [ 5041.338945] [] ? fput+0xf9/0x1a1 Aug 14 10:43:57 xen-001 kernel: [ 5041.338949] [] ? filp_close+0x62/0x6a Aug 14 10:43:57 xen-001 kernel: [ 5041.338954] [] ? put_files_struct+0x60/0xad Aug 14 10:43:57 xen-001 kernel: [ 5041.338958] [] ? do_exit+0x292/0x713 Aug 14 10:43:57 xen-001 kernel: [ 5041.338961] [] ? do_group_exit+0x74/0x9e Aug 14 10:43:57 xen-001 kernel: [ 5041.338965] [] ? get_signal_to_deliver+0x46d/0x48f Aug 14 10:43:57 xen-001 kernel: [ 5041.338970] [] ? force_sig_info_fault+0x5b/0x63 Aug 14 10:43:57 xen-001 kernel: [ 5041.338975] [] ? do_signal+0x38/0x610 Aug 14 10:43:57 xen-001 kernel: [ 5041.338979] [] ? arch_local_irq_restore+0x7/0x8 Aug 14 10:43:57 xen-001 kernel: [ 5041.338983] [] ? _raw_spin_unlock_irqrestore+0xe/0xf Aug 14 10:43:57 xen-001 kernel: [ 5041.338987] [] ? wake_up_new_task+0xb9/0xc2 Aug 14 10:43:57 xen-001 kernel: [ 5041.338992] [] ? sys_futex+0x120/0x151 Aug 14 10:43:57 xen-001 kernel: [ 5041.338995] [] ? do_notify_resume+0x25/0x68 Aug 14 10:43:57 xen-001 kernel: [ 5041.338999] [] ? retint_signal+0x48/0x8c ... Aug 14 10:44:17 xen-001 tap-ctl: tap-err:tap_ctl_connect: couldn't connect to /var/run/blktap-control/ctl9478: 111 > > > Cheers, > > Sylvain Regards - Frederik