From: Laurent Vivier <lvivier@redhat.com>
Date: Wed, 2 Jan 2019 14:16:03 +0000 (+0100)
Subject: cpus: ignore ESRCH in qemu_cpu_kick_thread()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=d455ebc4f827c14a29240db17931e170b6937c6c;p=qemu.git

cpus: ignore ESRCH in qemu_cpu_kick_thread()

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>
---

diff --git a/cpus.c b/cpus.c
index b09b702712..154daf57dc 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);
     }