[Xen-devel] Missed Stable backport? maybe [PATCH v2 0/4] xen-blk: bug fixes

[Jason Andryuk <jason.p.andryuk@xxxxxxxx>]

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" <Message-Id: 
1391509575-3949-1-git-send-email-roger.pau@xxxxxxxxxx> 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:
 <IRQ>  [<ffffffff8167bec7>] ? xen_blkbk_unmap+0x247/0x2f0
 [<ffffffff81009f40>] ? xen_clocksource_read+0x20/0x30
 [<ffffffff8101ba19>] ? sched_clock+0x9/0x10
 [<ffffffff810ea205>] ? sched_clock_cpu+0xb5/0x100
 [<ffffffff81147cab>] ? rcu_irq_exit+0x4b/0x90
 [<ffffffff810bbcee>] ? irq_exit+0x4e/0x90
 [<ffffffff8154d295>] ? xen_evtchn_do_upcall+0x35/0x50
 [<ffffffff81b6ad7e>] ? xen_do_hypervisor_callback+0x1e/0x30
 [<ffffffff81b68eca>] ? error_exit+0x2a/0x60
 [<ffffffff81b689fb>] ? retint_restore_args+0x5/0x6
 [<ffffffff81470cd2>] ? strlcpy+0x42/0x60
 [<ffffffff8112803c>] ? cgroup_path+0xbc/0xd0
 [<ffffffff8167bfff>] ? __end_block_io_op+0x8f/0x190
 [<ffffffff8167c116>] ? end_block_io_op+0x16/0x30
 [<ffffffff8120e47d>] ? bio_endio+0x1d/0x30
 [<ffffffff818d4ea5>] ? dec_pending+0x195/0x300
 [<ffffffff818d531f>] ? clone_endio+0x6f/0xa0
 [<ffffffff8120e47d>] ? bio_endio+0x1d/0x30
 [<ffffffff8144a608>] ? blk_update_request+0xc8/0x410
 [<ffffffff8144a96c>] ? blk_update_bidi_request+0x1c/0x80
 [<ffffffff8144a9ef>] ? blk_end_bidi_request+0x1f/0x60
 [<ffffffff8144aab0>] ? blk_end_request+0x10/0x20
 [<ffffffff8168a5f1>] ? scsi_io_completion+0xf1/0x640
 [<ffffffff81683250>] ? scsi_finish_command+0xb0/0x110
 [<ffffffff8168a3fe>] ? scsi_softirq_done+0x12e/0x160
 [<ffffffff81450543>] ? blk_done_softirq+0x83/0xa0
 [<ffffffff810bba70>] ? __do_softirq+0x100/0x250
 [<ffffffff81b6ad1c>] ? call_softirq+0x1c/0x30
 [<ffffffff81015cb5>] ? do_softirq+0x55/0x90
 [<ffffffff810bbd1d>] ? irq_exit+0x7d/0x90
 [<ffffffff8154d295>] ? xen_evtchn_do_upcall+0x35/0x50
 [<ffffffff81b6ad7e>] ? xen_do_hypervisor_callback+0x1e/0x30
 <EOI>  [<ffffffff8100122a>] ? xen_hypercall_xen_version+0xa/0x20
 [<ffffffff8100122a>] ? xen_hypercall_xen_version+0xa/0x20
 [<ffffffff81009f0d>] ? xen_force_evtchn_callback+0xd/0x10
 [<ffffffff8100a792>] ? check_events+0x12/0x20
 [<ffffffff8100a77f>] ? xen_restore_fl_direct_reloc+0x4/0x4
 [<ffffffff810085c4>] ? __xen_pgd_pin+0x124/0x2b0
 [<ffffffff81008772>] ? xen_dup_mmap+0x22/0x30
 [<ffffffff810b46c5>] ? dup_mm+0x385/0x580
 [<ffffffff810b552d>] ? copy_process.part.33+0xc3d/0x1450
 [<ffffffff810b5ef5>] ? do_fork+0xd5/0x300
 [<ffffffff810c5a82>] ? __set_task_blocked+0x32/0x70
 [<ffffffff810b61a6>] ? SyS_clone+0x16/0x20
 [<ffffffff81b697c9>] ? stub_clone+0x69/0x90
 [<ffffffff81b69469>] ? system_call_fastpath+0x16/0x1b

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel