Commit 31e323cc authored Nov 29, 2010 by Jeremy Fitzhardinge

xen: don't bother to stop other cpus on shutdown/reboot



Xen will shoot all the VCPUs when we do a shutdown hypercall, so there's
no need to do it manually.

In any case it will fail because all the IPI irqs have been pulled
down by this point, so the cross-CPU calls will simply hang forever.

Until change 76fac077 the function calls
were not synchronously waited for, so this wasn't apparent.  However after
that change the calls became synchronous leading to a hang on shutdown
on multi-VCPU guests.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stable Kernel <stable@kernel.org>
Cc: Alok Kataria <akataria@vmware.com>

parent 3561d43f

arch/x86/xen/enlighten.c

+0 −4

Original line number	Diff line number	Diff line
		@@ -1016,10 +1016,6 @@ static void xen_reboot(int reason)
		{
		struct sched_shutdown r = { .reason = reason };

		#ifdef CONFIG_SMP
		stop_other_cpus();
		#endif

		if (HYPERVISOR_sched_op(SCHEDOP_shutdown, &r))
		BUG();
		}