> Il 19/08/2014 13:28, David Hildenbrand ha scritto: > > Looking at the code, kvm_cpu_synchronize_state() seems to do these ioctls in > > the vcpu thread (e.g. comming from cpu_synchronize_all_states()), any reasons > > why kvm_cpu_synchronize_post_reset() doesn't do the same (e.g. called from > > cpu_synchronize_all_post_reset())? > > No reason, feel free to post a patch for QEMU kvm-all.c. > Documentation/virtual/kvm/api.txt clearly says: > > Only run vcpu ioctls from the same thread that was used to create the > vcpu. > > Paolo > Thanks! A little more tweaking in the other parts of s390x resets and we should be able to reduce the number of "wrong" ioctls (I think I found most cases that are responsible for the performance degradation). David -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
