http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=947

Summary: [LM] live migrate 2 guests between to machines in the opposite direction at the same time will lead to one guest restore quite slowly or even fail to restore Product: Xen Version: unstable Platform: Other OS/Version: All Status: NEW Severity: normal Priority: P2 Component: HVM AssignedTo: xen-...@lists.xensource.com ReportedBy: fan....@intel.com

Environment: ------------ Service OS (ia32/ia32e/IA64): ia32pae Guest OS (ia32/ia32e/IA64): ia32/ia32pae Change Set: 14687

Bug detailed description: -------------------------- I have two physical machines A and B, each with a guest running on it. Then I migrate the guest running on machine A to machine B, and migrate the guest on machine B to machine A at nearly the same time. Then the guest which is migrated from machine B to A need quite a long time(unaccepted, several mins) to restore on machine A successfully. The qemu window will not pop up for a long time, or even not pop up at all. Its status show as paused before the qemu window pop up.

Reproduce steps: ---------------- 1) xm create a guest on machine A 2) xm create a guest on machine B 3) xm migrate the guest on machine A to machine B 4) xm migrate the guest on machine B to machine A Conduct 3) and 4) at nearly the same time