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] [<ffffffffa0308411>] ?
blktap_device_destroy_sync+0x85/0x9b [blktap]
Aug 14 10:43:57 xen-001 kernel: [ 5041.338936] [<ffffffff8105fadf>] ?
add_wait_queue+0x3c/0x3c
Aug 14 10:43:57 xen-001 kernel: [ 5041.338940] [<ffffffffa0307444>] ?
blktap_ring_release+0x10/0x2d [blktap]
Aug 14 10:43:57 xen-001 kernel: [ 5041.338945] [<ffffffff810fb141>] ?
fput+0xf9/0x1a1
Aug 14 10:43:57 xen-001 kernel: [ 5041.338949] [<ffffffff810f8e6c>] ?
filp_close+0x62/0x6a
Aug 14 10:43:57 xen-001 kernel: [ 5041.338954] [<ffffffff81049831>] ?
put_files_struct+0x60/0xad
Aug 14 10:43:57 xen-001 kernel: [ 5041.338958] [<ffffffff81049e38>] ?
do_exit+0x292/0x713
Aug 14 10:43:57 xen-001 kernel: [ 5041.338961] [<ffffffff8104a539>] ?
do_group_exit+0x74/0x9e
Aug 14 10:43:57 xen-001 kernel: [ 5041.338965] [<ffffffff81055f94>] ?
get_signal_to_deliver+0x46d/0x48f
Aug 14 10:43:57 xen-001 kernel: [ 5041.338970] [<ffffffff81347759>] ?
force_sig_info_fault+0x5b/0x63
Aug 14 10:43:57 xen-001 kernel: [ 5041.338975] [<ffffffff8100de27>] ?
do_signal+0x38/0x610
Aug 14 10:43:57 xen-001 kernel: [ 5041.338979] [<ffffffff81070deb>] ?
arch_local_irq_restore+0x7/0x8
Aug 14 10:43:57 xen-001 kernel: [ 5041.338983] [<ffffffff8134eb77>] ?
_raw_spin_unlock_irqrestore+0xe/0xf
Aug 14 10:43:57 xen-001 kernel: [ 5041.338987] [<ffffffff8103f944>] ?
wake_up_new_task+0xb9/0xc2
Aug 14 10:43:57 xen-001 kernel: [ 5041.338992] [<ffffffff8106f987>] ?
sys_futex+0x120/0x151
Aug 14 10:43:57 xen-001 kernel: [ 5041.338995] [<ffffffff8100e435>] ?
do_notify_resume+0x25/0x68
Aug 14 10:43:57 xen-001 kernel: [ 5041.338999] [<ffffffff8134ef3c>] ?
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
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