[Qemu-devel] [Bug 1687578] [NEW] when migrate vm, reboot in guest os, the guest os sometime hang

[Lidong Chen]

Public bug reported:

qemu version:v2.9.0-rc5 release

1.virsh migrate --live 165cf436-312f-47e7-90f2-f8aa63f34893 --copy-storage-inc 
qemu+ssh://10.59.163.38/system
2.run reboot in guest os, add reboot in /etc/rc.local
3.guest os hang sometime.

strace output of qemu:

ppoll([{fd=9, events=POLLIN}, {fd=8, events=POLLIN}, {fd=4, events=POLLIN}, 
{fd=6, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, {0, 
0}, NULL, 8) = 0 (Timeout)
ppoll([{fd=9, events=POLLIN}, {fd=8, events=POLLIN}, {fd=4, events=POLLIN}, 
{fd=6, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, {0, 
698000000}, NULL, 8) = 0 (Timeout)
poll([{fd=20, events=POLLOUT}], 1, 0)   = 1 ([{fd=20, revents=POLLOUT|POLLHUP}])
ppoll([{fd=9, events=POLLIN}, {fd=8, events=POLLIN}, {fd=4, events=POLLIN}, 
{fd=6, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, {0, 
999000000}, NULL, 8^C <unfinished ...>

** Affects: qemu
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1687578

Title:
  when migrate vm, reboot in guest os, the guest os sometime hang

Status in QEMU:
  New

Bug description:
  qemu version:v2.9.0-rc5 release

  1.virsh migrate --live 165cf436-312f-47e7-90f2-f8aa63f34893 
--copy-storage-inc qemu+ssh://10.59.163.38/system
  2.run reboot in guest os, add reboot in /etc/rc.local
  3.guest os hang sometime.

  strace output of qemu:

  ppoll([{fd=9, events=POLLIN}, {fd=8, events=POLLIN}, {fd=4, events=POLLIN}, 
{fd=6, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, {0, 
0}, NULL, 8) = 0 (Timeout)
  ppoll([{fd=9, events=POLLIN}, {fd=8, events=POLLIN}, {fd=4, events=POLLIN}, 
{fd=6, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, {0, 
698000000}, NULL, 8) = 0 (Timeout)
  poll([{fd=20, events=POLLOUT}], 1, 0)   = 1 ([{fd=20, 
revents=POLLOUT|POLLHUP}])
  ppoll([{fd=9, events=POLLIN}, {fd=8, events=POLLIN}, {fd=4, events=POLLIN}, 
{fd=6, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, {0, 
999000000}, NULL, 8^C <unfinished ...>

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