From: Paolo Bonzini <pbonz...@redhat.com>
CPU threads have extended quiescent states while relinquishing control
to the accelerator (except TCG).
Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
Reviewed-by: Mike Day <ncm...@ncultra.org>
---
cpus.c | 3 +++
kvm-all.c | 3 +++
2 files changed, 6 insertions(+)
diff --git a/cpus.c b/cpus.c
index 0f65e76..624658e 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"
@@ -818,6 +819,7 @@ static void *qemu_dummy_cpu_thread_fn(void *arg)
while (1) {
current_cpu = NULL;
qemu_mutex_unlock_iothread();
+ rcu_thread_offline();
do {
int sig;
r = sigwait(&waitset, &sig);
@@ -826,6 +828,7 @@ static void *qemu_dummy_cpu_thread_fn(void *arg)
perror("sigwait");
exit(1);
}
+ rcu_thread_online();
qemu_mutex_lock_iothread();
current_cpu = cpu;
qemu_wait_io_event_common(cpu);
diff --git a/kvm-all.c b/kvm-all.c
index 716860f..a47573d 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 */
@@ -1641,7 +1642,9 @@ int kvm_cpu_exec(CPUState *cpu)
}
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);
--
1.8.3.1
