CPU threads have extended quiescent states while relinquishing control to the accelerator (except TCG).
Signed-off-by: Paolo Bonzini <pbonz...@redhat.com> --- cpus.c | 3 +++ kvm-all.c | 3 +++ 2 files changed, 6 insertions(+) diff --git a/cpus.c b/cpus.c index c8bc8ad..4b5cb8d 100644 --- a/cpus.c +++ b/cpus.c @@ -37,6 +37,7 @@ #include "sysemu/qtest.h" #include "qemu/main-loop.h" #include "qemu/bitmap.h" +#include "qemu/rcu.h" #ifndef _WIN32 #include "qemu/compatfd.h" @@ -793,6 +794,7 @@ static void *qemu_dummy_cpu_thread_fn(void *arg) while (1) { cpu_single_env = NULL; qemu_mutex_unlock_iothread(); + rcu_thread_offline(); do { int sig; r = sigwait(&waitset, &sig); @@ -801,6 +803,7 @@ static void *qemu_dummy_cpu_thread_fn(void *arg) perror("sigwait"); exit(1); } + rcu_thread_online(); qemu_mutex_lock_iothread(); cpu_single_env = env; qemu_wait_io_event_common(cpu); diff --git a/kvm-all.c b/kvm-all.c index 91aa7ff..547abe3 100644 --- a/kvm-all.c +++ b/kvm-all.c @@ -33,6 +33,7 @@ #include "exec/memory.h" #include "exec/address-spaces.h" #include "qemu/event_notifier.h" +#include "qemu/rcu.h" #include "trace.h" /* This check must be after config-host.h is included */ @@ -1644,7 +1645,9 @@ int kvm_cpu_exec(CPUArchState *env) } qemu_mutex_unlock_iothread(); + rcu_thread_offline(); run_ret = kvm_vcpu_ioctl(cpu, KVM_RUN, 0); + rcu_thread_online(); qemu_mutex_lock_iothread(); kvm_arch_post_run(cpu, run); -- 1.8.1.4