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-rw-r--r--arch/ia64/sn/kernel/xpc_main.c28
1 files changed, 27 insertions, 1 deletions
diff --git a/arch/ia64/sn/kernel/xpc_main.c b/arch/ia64/sn/kernel/xpc_main.c
index dcac286dab32..db57b46bddd5 100644
--- a/arch/ia64/sn/kernel/xpc_main.c
+++ b/arch/ia64/sn/kernel/xpc_main.c
@@ -82,6 +82,9 @@ struct device *xpc_part = &xpc_part_dbg_subname;
struct device *xpc_chan = &xpc_chan_dbg_subname;
+static int xpc_kdebug_ignore;
+
+
/* systune related variables for /proc/sys directories */
static int xpc_hb_interval = XPC_HB_DEFAULT_INTERVAL;
@@ -1148,7 +1151,12 @@ xpc_system_reboot(struct notifier_block *nb, unsigned long event, void *unused)
/*
- * This function is called when the system is being rebooted.
+ * This function is called when the system is being restarted or halted due
+ * to some sort of system failure. If this is the case we need to notify the
+ * other partitions to disengage from all references to our memory.
+ * This function can also be called when our heartbeater could be offlined
+ * for a time. In this case we need to notify other partitions to not worry
+ * about the lack of a heartbeat.
*/
static int
xpc_system_die(struct notifier_block *nb, unsigned long event, void *unused)
@@ -1158,11 +1166,25 @@ xpc_system_die(struct notifier_block *nb, unsigned long event, void *unused)
case DIE_MACHINE_HALT:
xpc_die_disengage();
break;
+
+ case DIE_KDEBUG_ENTER:
+ /* Should lack of heartbeat be ignored by other partitions? */
+ if (!xpc_kdebug_ignore) {
+ break;
+ }
+ /* fall through */
case DIE_MCA_MONARCH_ENTER:
case DIE_INIT_MONARCH_ENTER:
xpc_vars->heartbeat++;
xpc_vars->heartbeat_offline = 1;
break;
+
+ case DIE_KDEBUG_LEAVE:
+ /* Is lack of heartbeat being ignored by other partitions? */
+ if (!xpc_kdebug_ignore) {
+ break;
+ }
+ /* fall through */
case DIE_MCA_MONARCH_LEAVE:
case DIE_INIT_MONARCH_LEAVE:
xpc_vars->heartbeat++;
@@ -1387,3 +1409,7 @@ module_param(xpc_disengage_request_timelimit, int, 0);
MODULE_PARM_DESC(xpc_disengage_request_timelimit, "Number of seconds to wait "
"for disengage request to complete.");
+module_param(xpc_kdebug_ignore, int, 0);
+MODULE_PARM_DESC(xpc_kdebug_ignore, "Should lack of heartbeat be ignored by "
+ "other partitions when dropping into kdebug.");
+