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authorDean Nelson <dcn@sgi.com>2006-01-10 12:08:00 -0500
committerTony Luck <tony.luck@intel.com>2006-01-13 13:35:02 -0500
commit1f4674b2d5f63bac4c393ac4de1d6c1b6b72c09c (patch)
tree4a0832cd88e87896f020f88c0fb3ddf0f1ee0cb5
parent0752c670d83362609c7f3f59ffa0e180709c60c2 (diff)
[IA64-SGI] ignoring loss of heartbeat while XPC is in kdebug
Allow for the loss of heartbeat while in kdebug to be ignored by remote partitions. Signed-off-by: Dean Nelson <dcn@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
-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;
82struct device *xpc_chan = &xpc_chan_dbg_subname; 82struct device *xpc_chan = &xpc_chan_dbg_subname;
83 83
84 84
85static int xpc_kdebug_ignore;
86
87
85/* systune related variables for /proc/sys directories */ 88/* systune related variables for /proc/sys directories */
86 89
87static int xpc_hb_interval = XPC_HB_DEFAULT_INTERVAL; 90static int xpc_hb_interval = XPC_HB_DEFAULT_INTERVAL;
@@ -1148,7 +1151,12 @@ xpc_system_reboot(struct notifier_block *nb, unsigned long event, void *unused)
1148 1151
1149 1152
1150/* 1153/*
1151 * This function is called when the system is being rebooted. 1154 * This function is called when the system is being restarted or halted due
1155 * to some sort of system failure. If this is the case we need to notify the
1156 * other partitions to disengage from all references to our memory.
1157 * This function can also be called when our heartbeater could be offlined
1158 * for a time. In this case we need to notify other partitions to not worry
1159 * about the lack of a heartbeat.
1152 */ 1160 */
1153static int 1161static int
1154xpc_system_die(struct notifier_block *nb, unsigned long event, void *unused) 1162xpc_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)
1158 case DIE_MACHINE_HALT: 1166 case DIE_MACHINE_HALT:
1159 xpc_die_disengage(); 1167 xpc_die_disengage();
1160 break; 1168 break;
1169
1170 case DIE_KDEBUG_ENTER:
1171 /* Should lack of heartbeat be ignored by other partitions? */
1172 if (!xpc_kdebug_ignore) {
1173 break;
1174 }
1175 /* fall through */
1161 case DIE_MCA_MONARCH_ENTER: 1176 case DIE_MCA_MONARCH_ENTER:
1162 case DIE_INIT_MONARCH_ENTER: 1177 case DIE_INIT_MONARCH_ENTER:
1163 xpc_vars->heartbeat++; 1178 xpc_vars->heartbeat++;
1164 xpc_vars->heartbeat_offline = 1; 1179 xpc_vars->heartbeat_offline = 1;
1165 break; 1180 break;
1181
1182 case DIE_KDEBUG_LEAVE:
1183 /* Is lack of heartbeat being ignored by other partitions? */
1184 if (!xpc_kdebug_ignore) {
1185 break;
1186 }
1187 /* fall through */
1166 case DIE_MCA_MONARCH_LEAVE: 1188 case DIE_MCA_MONARCH_LEAVE:
1167 case DIE_INIT_MONARCH_LEAVE: 1189 case DIE_INIT_MONARCH_LEAVE:
1168 xpc_vars->heartbeat++; 1190 xpc_vars->heartbeat++;
@@ -1387,3 +1409,7 @@ module_param(xpc_disengage_request_timelimit, int, 0);
1387MODULE_PARM_DESC(xpc_disengage_request_timelimit, "Number of seconds to wait " 1409MODULE_PARM_DESC(xpc_disengage_request_timelimit, "Number of seconds to wait "
1388 "for disengage request to complete."); 1410 "for disengage request to complete.");
1389 1411
1412module_param(xpc_kdebug_ignore, int, 0);
1413MODULE_PARM_DESC(xpc_kdebug_ignore, "Should lack of heartbeat be ignored by "
1414 "other partitions when dropping into kdebug.");
1415