diff options
| author | Dean Nelson <dcn@sgi.com> | 2006-01-10 18:08:00 +0100 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2006-01-13 19:35:02 +0100 |
| commit | 1f4674b2d5f63bac4c393ac4de1d6c1b6b72c09c (patch) | |
| tree | 4a0832cd88e87896f020f88c0fb3ddf0f1ee0cb5 | |
| parent | [IA64-SGI] XPC and unregistering from notifier lists (diff) | |
| download | linux-1f4674b2d5f63bac4c393ac4de1d6c1b6b72c09c.tar.xz linux-1f4674b2d5f63bac4c393ac4de1d6c1b6b72c09c.zip | |
[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.c | 28 |
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."); + |