[libvirt] [PATCH 4/4] qemu: Limit refresh of CPU halted state to s390

From: Viktor Mihajlovski <mihajlov(a)linux.vnet.ibm.com&gt; Refreshing the halted state can cause VM performance issues. Since s390 is currently the only architecture with a known interest in the halted state, we're avoiding to call QEMU on other platforms. Signed-off-by: Viktor Mihajlovski <mihajlov(a)linux.vnet.ibm.com&gt; --- src/qemu/qemu_domain.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index 5395cd093c..aa652959ed 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -8726,6 +8726,11 @@ qemuDomainRefreshVcpuHalted(virQEMUDriverPtr driver, if (vm->def->virtType == VIR_DOMAIN_VIRT_QEMU) return 0; + /* The halted state is interresting only on s390(x). On other platforms + * the data would be stale at the time when it would be used. */ + if (!ARCH_IS_S390(vm->def->os.arch)) + return 0; + if (qemuDomainObjEnterMonitorAsync(driver, vm, asyncJob) < 0) return -1; -- 2.15.0