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[Qemu-devel] [PATCH 10/12] cpus: report RCU quiescent states
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PATCH 10/12] cpus: report RCU quiescent states |
Date: |
Wed, 15 May 2013 17:48:55 +0200 |
CPU threads have extended quiescent states while relinquishing control
to the accelerator (except TCG).
Signed-off-by: Paolo Bonzini <address@hidden>
---
cpus.c | 3 +++
kvm-all.c | 3 +++
2 files changed, 6 insertions(+)
diff --git a/cpus.c b/cpus.c
index c232265..66970d6 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 8222729..6f952ac 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 */
@@ -1611,7 +1612,9 @@ 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
- [Qemu-devel] [RFC PATCH 00/12] RCU implementation for QEMU, Paolo Bonzini, 2013/05/15
- [Qemu-devel] [PATCH 02/12] qemu-thread: add QemuEvent, Paolo Bonzini, 2013/05/15
- [Qemu-devel] [PATCH 03/12] rcu: add rcu library, Paolo Bonzini, 2013/05/15
- [Qemu-devel] [PATCH 04/12] qemu-thread: register threads with RCU, Paolo Bonzini, 2013/05/15
- [Qemu-devel] [PATCH 05/12] rcu: add call_rcu, Paolo Bonzini, 2013/05/15
- [Qemu-devel] [PATCH 06/12] rcu: add rcutorture, Paolo Bonzini, 2013/05/15
- [Qemu-devel] [PATCH 09/12] event loop: report RCU quiescent states, Paolo Bonzini, 2013/05/15
- [Qemu-devel] [PATCH 08/12] qemu-thread: report RCU quiescent states, Paolo Bonzini, 2013/05/15
- [Qemu-devel] [PATCH 10/12] cpus: report RCU quiescent states,
Paolo Bonzini <=
- [Qemu-devel] [PATCH 01/12] add a header file for atomic operations, Paolo Bonzini, 2013/05/15
- [Qemu-devel] [PATCH 11/12] block: report RCU quiescent states, Paolo Bonzini, 2013/05/15
- [Qemu-devel] [PATCH 12/12] migration: report RCU quiescent states, Paolo Bonzini, 2013/05/15
- [Qemu-devel] [PATCH 07/12] rcu: allow nested calls to rcu_thread_offline/rcu_thread_online, Paolo Bonzini, 2013/05/15
- Re: [Qemu-devel] [RFC PATCH 00/12] RCU implementation for QEMU, Peter Maydell, 2013/05/15
- Re: [Qemu-devel] [RFC PATCH 00/12] RCU implementation for QEMU, Peter Maydell, 2013/05/15
- Re: [Qemu-devel] [RFC PATCH 00/12] RCU implementation for QEMU, Peter Maydell, 2013/05/15