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Hi,<br>
<br>
Seems that after the migration, things stop working on the guest.
Cant shutdown, reboot, cron fails, ssh fails.<br>
<br>
Further info (quest's console during migration process and attempt
to migrate back<br>
<br>
<br>
-----------<br>
migrate from server 1 to server 2<br>
<br>
<br>
root@c1-sb-vs1:~# xl console c1-sb-test1<br>
<br>
c1-sb-test1 login: <br>
Debian GNU/Linux 8 c1-sb-test1 hvc0<br>
<br>
c1-sb-test1 login: [ 31.750901] Freezing user space processes ...
(elapsed 0.001 seconds) done.<br>
[ 31.752377] Freezing remaining freezable tasks ... (elapsed 0.001
seconds) done.<br>
[ 31.753716] PM: freeze of devices complete after 0.077 msecs<br>
[ 31.753748] PM: late freeze of devices complete after 0.023 msecs<br>
[ 31.753785] PM: noirq freeze of devices complete after 0.032
msecs<br>
<br>
<... disconnect ...><br>
<br>
root@c1-sb-vs2:~# xl console c1-sb-test1 <br>
[ 31.757439] xen:grant_table: Grant tables using version 1 layout<br>
[ 31.757439] PM: noirq restore of devices complete after 0.036
msecs<br>
[ 31.757439] PM: early restore of devices complete after 0.022
msecs<br>
[ 31.761161] PM: restore of devices complete after 6.782 msecs<br>
[ 31.761190] Restarting tasks ... done.<br>
[ 31.778758] Setting capacity to 10485760<br>
<br>
Debian GNU/Linux 8 c1-sb-test1 hvc0<br>
<br>
c1-sb-test1 login: <br>
<br>
<br>
<br>
<br>
-----------<br>
attempt to migrate back from server 2 to server 1<br>
<br>
<br>
root@c1-sb-vs2:~# xl console c1-sb-test1 <br>
<br>
Debian GNU/Linux 8 c1-sb-test1 hvc0<br>
<br>
c1-sb-test1 login: [ 92.404108] random: nonblocking pool is
initialized<br>
[ 93.959766] Freezing user space processes ... <br>
[ 113.960323] Freezing of tasks failed after 20.000 seconds (1
tasks refusing to freeze, wq_busy=0):<br>
[ 113.960331] cron D ffff88001f815bc0 0 425 396
0x00000004<br>
[ 113.960340] ffff88001a94e5c0 ffffffff81a0d500 ffff8800028fc000
ffff8800028fb9e8<br>
[ 113.960346] ffff880002199598 ffff88001a94e5c0 ffff88001a93e240
ffff8800021994c0<br>
[ 113.960360] ffffffff815c2a81 ffff8800021995a0 ffffffff815c5942
7fffffffffffffff<br>
[ 113.960372] Call Trace:<br>
[ 113.960416] [<ffffffff815c2a81>] ? schedule+0x31/0x80<br>
[ 113.960424] [<ffffffff815c5942>] ?
schedule_timeout+0x1b2/0x270<br>
[ 113.960441] [<ffffffff812e4f77>] ?
blk_finish_plug+0x27/0x40<br>
[ 113.960516] [<ffffffffc007d8ef>] ?
_xfs_buf_ioapply+0x35f/0x490 [xfs]<br>
[ 113.960528] [<ffffffff815c34b1>] ?
wait_for_completion+0xf1/0x130<br>
[ 113.960545] [<ffffffff810a3790>] ? wake_up_q+0x60/0x60<br>
[ 113.960591] [<ffffffffc007f61f>] ?
xfs_buf_read_map+0xff/0x180 [xfs]<br>
[ 113.960645] [<ffffffffc007f368>] ?
xfs_buf_submit_wait+0x78/0x200 [xfs]<br>
[ 113.960684] [<ffffffffc00ac3a8>] ?
xfs_trans_read_buf_map+0xe8/0x330 [xfs]<br>
[ 113.960728] [<ffffffffc007f61f>] ?
xfs_buf_read_map+0xff/0x180 [xfs]<br>
[ 113.960781] [<ffffffffc00ac3a8>] ?
xfs_trans_read_buf_map+0xe8/0x330 [xfs]<br>
[ 113.960825] [<ffffffffc0071f3e>] ?
xfs_imap_to_bp+0x6e/0xf0 [xfs]<br>
[ 113.960883] [<ffffffffc0072680>] ? xfs_iread+0x80/0x2c0
[xfs]<br>
[ 113.960931] [<ffffffffc0087d62>] ? xfs_iget+0x332/0x840
[xfs]<br>
[ 113.960982] [<ffffffffc0090950>] ? xfs_lookup+0x100/0x140
[xfs]<br>
[ 113.961042] [<ffffffffc008d5a3>] ? xfs_vn_lookup+0x73/0xb0
[xfs]<br>
[ 113.961071] [<ffffffff8120a376>] ? __d_alloc+0x116/0x170<br>
[ 113.961094] [<ffffffff811faf89>] ? lookup_real+0x19/0x60<br>
[ 113.961104] [<ffffffff811fb397>] ? lookup_slow+0x57/0xe0<br>
[ 113.961113] [<ffffffff811fdcd3>] ?
walk_component+0x1f3/0x470<br>
[ 113.961132] [<ffffffff811fbcf9>] ? path_init+0x1d9/0x330<br>
[ 113.961142] [<ffffffff811fe6bd>] ?
path_lookupat+0x5d/0x110<br>
[ 113.961151] [<ffffffff81200dc1>] ?
filename_lookup+0xb1/0x180<br>
[ 113.961161] [<ffffffff812009ff>] ?
getname_flags+0x6f/0x1e0<br>
[ 113.961181] [<ffffffff811f5ff9>] ? vfs_fstatat+0x59/0xb0<br>
[ 113.961189] [<ffffffff811916cc>] ? vm_mmap_pgoff+0xbc/0xf0<br>
[ 113.961195] [<ffffffff811f654a>] ? SYSC_newstat+0x2a/0x60<br>
[ 113.961203] [<ffffffff810648de>] ?
__do_page_fault+0x20e/0x500<br>
[ 113.961211] [<ffffffff815c6776>] ?
system_call_fast_compare_end+0xc/0x96<br>
[ 113.961217] <br>
[ 113.961225] Restarting tasks ... done.<br>
[ 113.962782] xen:manage: do_suspend: freeze processes failed -16<br>
[ 240.032030] INFO: task cron:425 blocked for more than 120
seconds.<br>
[ 240.032043] Tainted: G W E 4.6.0-1-amd64 #1<br>
[ 240.032049] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.<br>
[ 240.032058] cron D ffff88001f815bc0 0 425 396
0x00000004<br>
[ 240.032072] ffff88001a94e5c0 ffffffff81a0d500 ffff8800028fc000
ffff8800028fb9e8<br>
[ 240.032084] ffff880002199598 ffff88001a94e5c0 ffff88001a93e240
ffff8800021994c0<br>
[ 240.032100] ffffffff815c2a81 ffff8800021995a0 ffffffff815c5942
7fffffffffffffff<br>
[ 240.032122] Call Trace:<br>
[ 240.032147] [<ffffffff815c2a81>] ? schedule+0x31/0x80<br>
[ 240.032159] [<ffffffff815c5942>] ?
schedule_timeout+0x1b2/0x270<br>
[ 240.032175] [<ffffffff812e4f77>] ?
blk_finish_plug+0x27/0x40<br>
[ 240.032235] [<ffffffffc007d8ef>] ?
_xfs_buf_ioapply+0x35f/0x490 [xfs]<br>
[ 240.032252] [<ffffffff815c34b1>] ?
wait_for_completion+0xf1/0x130<br>
[ 240.032274] [<ffffffff810a3790>] ? wake_up_q+0x60/0x60<br>
[ 240.032306] [<ffffffffc007f61f>] ?
xfs_buf_read_map+0xff/0x180 [xfs]<br>
[ 240.032360] [<ffffffffc007f368>] ?
xfs_buf_submit_wait+0x78/0x200 [xfs]<br>
[ 240.032395] [<ffffffffc00ac3a8>] ?
xfs_trans_read_buf_map+0xe8/0x330 [xfs]<br>
[ 240.032444] [<ffffffffc007f61f>] ?
xfs_buf_read_map+0xff/0x180 [xfs]<br>
[ 240.032479] [<ffffffffc00ac3a8>] ?
xfs_trans_read_buf_map+0xe8/0x330 [xfs]<br>
[ 240.032520] [<ffffffffc0071f3e>] ?
xfs_imap_to_bp+0x6e/0xf0 [xfs]<br>
[ 240.032557] [<ffffffffc0072680>] ? xfs_iread+0x80/0x2c0
[xfs]<br>
[ 240.032592] [<ffffffffc0087d62>] ? xfs_iget+0x332/0x840
[xfs]<br>
[ 240.032629] [<ffffffffc0090950>] ? xfs_lookup+0x100/0x140
[xfs]<br>
[ 240.032671] [<ffffffffc008d5a3>] ? xfs_vn_lookup+0x73/0xb0
[xfs]<br>
[ 240.032681] [<ffffffff8120a376>] ? __d_alloc+0x116/0x170<br>
[ 240.032688] [<ffffffff811faf89>] ? lookup_real+0x19/0x60<br>
[ 240.032697] [<ffffffff811fb397>] ? lookup_slow+0x57/0xe0<br>
[ 240.032713] [<ffffffff811fdcd3>] ?
walk_component+0x1f3/0x470<br>
[ 240.032719] [<ffffffff811fbcf9>] ? path_init+0x1d9/0x330<br>
[ 240.032726] [<ffffffff811fe6bd>] ?
path_lookupat+0x5d/0x110<br>
[ 240.032742] [<ffffffff81200dc1>] ?
filename_lookup+0xb1/0x180<br>
[ 240.032749] [<ffffffff812009ff>] ?
getname_flags+0x6f/0x1e0<br>
[ 240.032756] [<ffffffff811f5ff9>] ? vfs_fstatat+0x59/0xb0<br>
[ 240.032763] [<ffffffff811916cc>] ? vm_mmap_pgoff+0xbc/0xf0<br>
[ 240.032775] [<ffffffff811f654a>] ? SYSC_newstat+0x2a/0x60<br>
[ 240.032783] [<ffffffff810648de>] ?
__do_page_fault+0x20e/0x500<br>
[ 240.032790] [<ffffffff815c6776>] ?
system_call_fast_compare_end+0xc/0x96<br>
<br>
<br>
<br>
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