From bda9cc7585816a5233beba2661510ecc4d69c4e2 Mon Sep 17 00:00:00 2001 Message-Id: From: Viktor Mihajlovski Date: Wed, 7 Feb 2018 14:16:02 +0100 Subject: [PATCH] qemu: Limit refresh of CPU halted state to s390 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 (cherry picked from commit 818a29e0c7d6840e87e9ca6019b9f0bc1983566e) https://bugzilla.redhat.com/show_bug.cgi?id=1534585 --- 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 e87c7d030c..0f7f3b7f50 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -7989,6 +7989,11 @@ 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; -- 2.16.1