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[Qemu-devel] [PATCH 1/6] cpus: hax: register/unregister thread with RCU,


From: Paolo Bonzini
Subject: [Qemu-devel] [PATCH 1/6] cpus: hax: register/unregister thread with RCU, exit loop on unplug
Date: Thu, 1 Feb 2018 09:44:25 -0500

Signed-off-by: Paolo Bonzini <address@hidden>
---
 cpus.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/cpus.c b/cpus.c
index 1495ed5c36..231550a0d8 100644
--- a/cpus.c
+++ b/cpus.c
@@ -1474,6 +1474,7 @@ static void *qemu_hax_cpu_thread_fn(void *arg)
     CPUState *cpu = arg;
     int r;
 
+    rcu_register_thread();
     qemu_mutex_lock_iothread();
     qemu_thread_get_self(cpu->thread);
 
@@ -1485,7 +1486,7 @@ static void *qemu_hax_cpu_thread_fn(void *arg)
     hax_init_vcpu(cpu);
     qemu_cond_signal(&qemu_cpu_cond);
 
-    while (1) {
+    do {
         if (cpu_can_run(cpu)) {
             r = hax_smp_cpu_exec(cpu);
             if (r == EXCP_DEBUG) {
@@ -1494,7 +1495,8 @@ static void *qemu_hax_cpu_thread_fn(void *arg)
         }
 
         qemu_wait_io_event(cpu);
-    }
+    } while (!cpu->unplug || cpu_can_run(cpu));
+    rcu_unregister_thread();
     return NULL;
 }
 
-- 
2.14.3





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