vmm(4): bump remote vmclear spinout ticks

Older/slower hosts could easily hit the cap under load. Set it to
the same value we use in mplock_debug.

ok mlarkin@

diff --git a/sys/arch/amd64/amd64/vmm.c b/sys/arch/amd64/amd64/vmm.c
index 2535558..8e588f7 100644 (file)
--- a/sys/arch/amd64/amd64/vmm.c
+++ b/sys/arch/amd64/amd64/vmm.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: vmm.c,v 1.295 2021/11/22 12:55:40 dv Exp $    */
+/*     $OpenBSD: vmm.c,v 1.296 2021/11/29 15:55:36 dv Exp $    */
 /*
  * Copyright (c) 2014 Mike Larkin <mlarkin@openbsd.org>
  *
@@ -1368,7 +1368,7 @@ vmclear_on_cpu(struct cpu_info *ci)
 static int
 vmx_remote_vmclear(struct cpu_info *ci, struct vcpu *vcpu)
 {
-       int ret = 0, nticks = 100000;
+       int ret = 0, nticks = 200000000;
 
        rw_enter_write(&ci->ci_vmcs_lock);
        atomic_swap_ulong(&ci->ci_vmcs_pa, vcpu->vc_control_pa);