/*
* Start the process of deactivating the specified partition.
*/
void
xpc_deactivate_partition(const int line, struct xpc_partition *part,
enum xp_retval reason)
{
unsigned long irq_flags;
spin_lock_irqsave(&part->act_lock, irq_flags);
if (part->act_state == XPC_P_AS_INACTIVE) {
XPC_SET_REASON(part, reason, line);
spin_unlock_irqrestore(&part->act_lock, irq_flags);
if (reason == xpReactivating) {
/* we interrupt ourselves to reactivate partition */
xpc_request_partition_reactivation(part);
}
return;
}
if (part->act_state == XPC_P_AS_DEACTIVATING) {
if ((part->reason == xpUnloading && reason != xpUnloading) ||
reason == xpReactivating) {
XPC_SET_REASON(part, reason, line);
}
spin_unlock_irqrestore(&part->act_lock, irq_flags);
return;
}
part->act_state = XPC_P_AS_DEACTIVATING;
XPC_SET_REASON(part, reason, line);
spin_unlock_irqrestore(&part->act_lock, irq_flags);
/* ask remote partition to deactivate with regard to us */
xpc_request_partition_deactivation(part);
/* set a timelimit on the disengage phase of the deactivation request */
part->disengage_timeout = jiffies + (xpc_disengage_timelimit * HZ);
part->disengage_timer.expires = part->disengage_timeout;
add_timer(&part->disengage_timer);
dev_dbg(xpc_part, "bringing partition %d down, reason = %d\n",
XPC_PARTID(part), reason);
xpc_partition_going_down(part, reason);
}
/*
* Notify other partitions to deactivate from us by first disengaging from all
* references to our memory.
*/
static void
xpc_die_deactivate(void)
{
struct xpc_partition *part;
short partid;
int any_engaged;
long keep_waiting;
long wait_to_print;
/* keep xpc_hb_checker thread from doing anything (just in case) */
xpc_exiting = 1;
xpc_disallow_all_hbs(); /*indicate we're deactivated */
for (partid = 0; partid < xp_max_npartitions; partid++) {
part = &xpc_partitions[partid];
if (xpc_partition_engaged(partid) ||
part->act_state != XPC_P_AS_INACTIVE) {
xpc_request_partition_deactivation(part);
xpc_indicate_partition_disengaged(part);
}
}
/*
* Though we requested that all other partitions deactivate from us,
* we only wait until they've all disengaged or we've reached the
* defined timelimit.
*
* Given that one iteration through the following while-loop takes
* approximately 200 microseconds, calculate the #of loops to take
* before bailing and the #of loops before printing a waiting message.
*/
keep_waiting = xpc_disengage_timelimit * 1000 * 5;
wait_to_print = XPC_DEACTIVATE_PRINTMSG_INTERVAL * 1000 * 5;
while (1) {
any_engaged = xpc_any_partition_engaged();
if (!any_engaged) {
dev_info(xpc_part, "all partitions have deactivated\n");
break;
}
if (!keep_waiting--) {
for (partid = 0; partid < xp_max_npartitions;
partid++) {
if (xpc_partition_engaged(partid)) {
dev_info(xpc_part, "deactivate from "
"remote partition %d timed "
"out\n", partid);
}
}
break;
}
if (!wait_to_print--) {
dev_info(xpc_part, "waiting for remote partitions to "
"deactivate, timeout in %ld seconds\n",
keep_waiting / (1000 * 5));
wait_to_print = XPC_DEACTIVATE_PRINTMSG_INTERVAL *
1000 * 5;
}
udelay(200);
}
}