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[PULL,10/76] cpus: ignore ESRCH in qemu_cpu_kick_thread()

Message ID 1549390526-24246-11-git-send-email-pbonzini@redhat.com
State New
Headers show
Series [PULL,01/76] vhost-user-test: use g_cond_broadcast | expand

Commit Message

Paolo Bonzini Feb. 5, 2019, 6:14 p.m. UTC 
From: Laurent Vivier <lvivier@redhat.com>

We can have a race condition between qemu_cpu_kick_thread() and
qemu_kvm_cpu_thread_fn() when we hotunplug a CPU. In this case,
qemu_cpu_kick_thread() can try to kick a thread that is exiting.
pthread_kill() returns an error and qemu is stopped by an exit(1).

   qemu:qemu_cpu_kick_thread: No such process

We can ignore safely this error.

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 cpus.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/cpus.c b/cpus.c
index b09b702..154daf5 100644
--- a/cpus.c
+++ b/cpus.c
@@ -1778,7 +1778,7 @@  static void qemu_cpu_kick_thread(CPUState *cpu)
     }
     cpu->thread_kicked = true;
     err = pthread_kill(cpu->thread->thread, SIG_IPI);
-    if (err) {
+    if (err && err != ESRCH) {
         fprintf(stderr, "qemu:%s: %s", __func__, strerror(err));
         exit(1);
     }