>>> On 07.11.16 at 09:07, <feng...@intel.com> wrote: > This patch handles some corner cases when the last assigned device > is removed from the domain. In this case we should carefully handle > pi descriptor and the per-cpu blocking list, to make sure: > - all the PI descriptor are in the right state when next time a > devices is assigned to the domain again. > - No remaining vcpus of the domain in the per-cpu blocking list. > > Here we call vmx_pi_unblock_vcpu() to remove the vCPU from the blocking list > if it is on the list. However, this could happen when vmx_vcpu_block() is > being called, hence we might incorrectly add the vCPU to the blocking list > while the last devcie is detached from the domain. Consider that the > situation > can only occur when detaching the last device from the domain and it is not > a frequent operation, so we use domain_pause before that, which is > considered > as an clean and maintainable solution for the situation. > > Signed-off-by: Feng Wu <feng...@intel.com>
Reviewed-by: Jan Beulich <jbeul...@suse.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
