From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Andryuk Subject: Missed Stable backport? maybe [PATCH v2 0/4] xen-blk: bug fixes Date: Fri, 20 Jun 2014 10:32:17 -0400 Message-ID: <53A445F1.9010204@aero.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: xen-devel@lists.xen.org, roger.pau@citrix.com Cc: david.vrabel@citrix.com List-Id: xen-devel@lists.xenproject.org Hi Roger, I'm seeing a crash on shutdown in xen_blkbk_unmap on 3.12.22. kdb backtrace below. Could this be the shutdown race fixed by "[PATCH v2 3/4] xen-blkback: fix shutdown race"? That email does not provide the observed backtrace, so I cannot compare. The cover letter for "[PATCH v2 0/4] xen-blk: bug fixes" mentions backport to stable. However, stable was not CC-ed and the patches seem to be missing from linux-stable. Was this just an oversight? Regards, Jason [0]kdb> bt Stack traceback for pid 6523 0xffff880010033b10 6523 6522 1 0 R 0xffff880010033fd0 *block ffff88007c603ae8 000000000000e02b ffffffff8167bec7 ffff88007c603b50 ffff8800103fc030 ffffffff81009f40 ffff88007c603b10 ffffffff8101ba19 ffff88007c603b38 ffffffff810ea205 0000000000000001 ffff880010033b10 Call Trace: [] ? xen_blkbk_unmap+0x247/0x2f0 [] ? xen_clocksource_read+0x20/0x30 [] ? sched_clock+0x9/0x10 [] ? sched_clock_cpu+0xb5/0x100 [] ? rcu_irq_exit+0x4b/0x90 [] ? irq_exit+0x4e/0x90 [] ? xen_evtchn_do_upcall+0x35/0x50 [] ? xen_do_hypervisor_callback+0x1e/0x30 [] ? error_exit+0x2a/0x60 [] ? retint_restore_args+0x5/0x6 [] ? strlcpy+0x42/0x60 [] ? cgroup_path+0xbc/0xd0 [] ? __end_block_io_op+0x8f/0x190 [] ? end_block_io_op+0x16/0x30 [] ? bio_endio+0x1d/0x30 [] ? dec_pending+0x195/0x300 [] ? clone_endio+0x6f/0xa0 [] ? bio_endio+0x1d/0x30 [] ? blk_update_request+0xc8/0x410 [] ? blk_update_bidi_request+0x1c/0x80 [] ? blk_end_bidi_request+0x1f/0x60 [] ? blk_end_request+0x10/0x20 [] ? scsi_io_completion+0xf1/0x640 [] ? scsi_finish_command+0xb0/0x110 [] ? scsi_softirq_done+0x12e/0x160 [] ? blk_done_softirq+0x83/0xa0 [] ? __do_softirq+0x100/0x250 [] ? call_softirq+0x1c/0x30 [] ? do_softirq+0x55/0x90 [] ? irq_exit+0x7d/0x90 [] ? xen_evtchn_do_upcall+0x35/0x50 [] ? xen_do_hypervisor_callback+0x1e/0x30 [] ? xen_hypercall_xen_version+0xa/0x20 [] ? xen_hypercall_xen_version+0xa/0x20 [] ? xen_force_evtchn_callback+0xd/0x10 [] ? check_events+0x12/0x20 [] ? xen_restore_fl_direct_reloc+0x4/0x4 [] ? __xen_pgd_pin+0x124/0x2b0 [] ? xen_dup_mmap+0x22/0x30 [] ? dup_mm+0x385/0x580 [] ? copy_process.part.33+0xc3d/0x1450 [] ? do_fork+0xd5/0x300 [] ? __set_task_blocked+0x32/0x70 [] ? SyS_clone+0x16/0x20 [] ? stub_clone+0x69/0x90 [] ? system_call_fastpath+0x16/0x1b