D57619.diff
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	diff --git a/usr.sbin/bhyve/bhyverun.c b/usr.sbin/bhyve/bhyverun.c
	--- a/usr.sbin/bhyve/bhyverun.c
	+++ b/usr.sbin/bhyve/bhyverun.c
	@@ -566,15 +566,21 @@
	{
	char tname[MAXCOMLEN + 1];
	struct vcpu_info *vi = param;
	- int error;

	snprintf(tname, sizeof(tname), "vcpu %d", vi->vcpuid);
	pthread_set_name_np(pthread_self(), tname);

	if (vcpumap[vi->vcpuid] != NULL) {
	- error = pthread_setaffinity_np(pthread_self(),
	- sizeof(cpuset_t), vcpumap[vi->vcpuid]);
	- assert(error == 0);
	+ if (pthread_setaffinity_np(pthread_self(),
	+ sizeof(cpuset_t), vcpumap[vi->vcpuid]) != 0) {
	+ int i;
	+ warn("Error pinning vcpu %d to host cpuset@%p", vi->vcpuid,
	+ vcpumap[vi->vcpuid]);
	+ CPU_FOREACH_ISSET(i, vcpumap[vi->vcpuid]) {
	+ warnx("cpu %d enabled\n", i);
	+ }
	+ exit(BHYVE_EXIT_ERROR);
	+ }
	}

	#ifdef BHYVE_SNAPSHOT