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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>
This commit is contained in:
Laurent Vivier 2019-01-02 15:16:03 +01:00 committed by Paolo Bonzini
parent d99e97e691
commit d455ebc4f8
1 changed files with 1 additions and 1 deletions
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2
cpus.c
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@ -1778,7 +1778,7 @@ static void qemu_cpu_kick_thread(CPUState *cpu)
} }
cpu->thread_kicked = true; cpu->thread_kicked = true;
err = pthread_kill(cpu->thread->thread, SIG_IPI); err = pthread_kill(cpu->thread->thread, SIG_IPI);
if (err) { if (err && err != ESRCH) {
fprintf(stderr, "qemu:%s: %s", __func__, strerror(err)); fprintf(stderr, "qemu:%s: %s", __func__, strerror(err));
exit(1); exit(1);
} }