LAPLACE Cyprien wrote:
An example: in kernel/pid.c:alloc_pid(), if one of the guest CPUs is descheduled when holding the pidmap_lock, what happens to the other guest CPUs who want to alloc/free pids ? Are they blocked too ?
Yup. This is where it's really nice to have directed yields, where you tell the hypervisor to give your physical CPU time to the vcpu that's holding the lock you're blocking on. I know s390 can do this. Perhaps it's something worth generalizing in paravirt_ops?
-- Chris _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/virtualization
