Jan Beulich
2010-Nov-16 07:36 UTC
[Xen-devel] [PATCH] linux-2.6.18: don''t register shutdown watch and suspend event channel for Dom0
This pointlessly consumes resources and poses the risk of either
getting triggered inadvertently.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
--- a/drivers/xen/core/reboot.c
+++ b/drivers/xen/core/reboot.c
@@ -280,6 +280,15 @@ static int setup_shutdown_watcher(void)
{
int err;
+ err = register_xenbus_watch(&sysrq_watch);
+ if (err) {
+ printk(KERN_ERR "Failed to set sysrq watcher\n");
+ return err;
+ }
+
+ if (is_initial_xendomain())
+ return 0;
+
xenbus_scanf(XBT_NIL, "control",
"platform-feature-multiprocessor-suspend",
"%d", &fast_suspend);
@@ -290,12 +299,6 @@ static int setup_shutdown_watcher(void)
return err;
}
- err = register_xenbus_watch(&sysrq_watch);
- if (err) {
- printk(KERN_ERR "Failed to set sysrq watcher\n");
- return err;
- }
-
/* suspend event channel */
err = setup_suspend_evtchn();
if (err) {
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