No pending crash reports.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1567167
Title:
Ubuntu 15.10: tsc_offset is error for hot-plugged vcpu.
Status in linux package in Ubuntu:
Confirmed
Bug description:
1. when hot plug vcpu, KVM will call kvm_write_tsc set the new vcpu's
tsc_offset to host tsc. The new vcpu's tsc_offsets is greatly
different from preallocated vcpu's tsc_offset.
2. For redhat 6.x, the vm will show warning and turn off TSC clock.
kernel: CPU 1 got hotplugged
kernel: kvm-clock: cpu 1, msr 0:282367c1, secondary cpu clock
kernel: TSC synchronization [CPU#0 -> CPU#1]:
kernel: Measured 150076598781 cycles TSC warp between CPUs, turning off TSC
clock.
kernel: Marking TSC unstable due to check_tsc_sync_source failed
3. I think should set the new vcpu's tsc_offset to
kvm->arch.cur_tsc_offset.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1567167/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
