[IA64] move XP and XPC to drivers/misc/sgi-xp

Move XPC and XPNET from arch/ia64/sn/kernel to drivers/misc/sgi-xp.

Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 0 insertions, 1431 deletions

diff --git a/arch/ia64/sn/kernel/xpc_main.c b/arch/ia64/sn/kernel/xpc_main.c
deleted file mode 100644
index 9e0b164..0000000
--- a/arch/ia64/sn/kernel/xpc_main.c
+++ /dev/null
@@ -1,1431 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (c) 2004-2007 Silicon Graphics, Inc.  All Rights Reserved.
- */
-
-
-/*
- * Cross Partition Communication (XPC) support - standard version.
- *
- *	XPC provides a message passing capability that crosses partition
- *	boundaries. This module is made up of two parts:
- *
- *	    partition	This part detects the presence/absence of other
- *			partitions. It provides a heartbeat and monitors
- *			the heartbeats of other partitions.
- *
- *	    channel	This part manages the channels and sends/receives
- *			messages across them to/from other partitions.
- *
- *	There are a couple of additional functions residing in XP, which
- *	provide an interface to XPC for its users.
- *
- *
- *	Caveats:
- *
- *	  . We currently have no way to determine which nasid an IPI came
- *	    from. Thus, xpc_IPI_send() does a remote AMO write followed by
- *	    an IPI. The AMO indicates where data is to be pulled from, so
- *	    after the IPI arrives, the remote partition checks the AMO word.
- *	    The IPI can actually arrive before the AMO however, so other code
- *	    must periodically check for this case. Also, remote AMO operations
- *	    do not reliably time out. Thus we do a remote PIO read solely to
- *	    know whether the remote partition is down and whether we should
- *	    stop sending IPIs to it. This remote PIO read operation is set up
- *	    in a special nofault region so SAL knows to ignore (and cleanup)
- *	    any errors due to the remote AMO write, PIO read, and/or PIO
- *	    write operations.
- *
- *	    If/when new hardware solves this IPI problem, we should abandon
- *	    the current approach.
- *
- */
-
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/syscalls.h>
-#include <linux/cache.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <linux/reboot.h>
-#include <linux/completion.h>
-#include <linux/kdebug.h>
-#include <asm/sn/intr.h>
-#include <asm/sn/sn_sal.h>
-#include <asm/uaccess.h>
-#include <asm/sn/xpc.h>
-
-
-/* define two XPC debug device structures to be used with dev_dbg() et al */
-
-struct device_driver xpc_dbg_name = {
-	.name = "xpc"
-};
-
-struct device xpc_part_dbg_subname = {
-	.bus_id = {0},		/* set to "part" at xpc_init() time */
-	.driver = &xpc_dbg_name
-};
-
-struct device xpc_chan_dbg_subname = {
-	.bus_id = {0},		/* set to "chan" at xpc_init() time */
-	.driver = &xpc_dbg_name
-};
-
-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;
-static int xpc_hb_min_interval = 1;
-static int xpc_hb_max_interval = 10;
-
-static int xpc_hb_check_interval = XPC_HB_CHECK_DEFAULT_INTERVAL;
-static int xpc_hb_check_min_interval = 10;
-static int xpc_hb_check_max_interval = 120;
-
-int xpc_disengage_request_timelimit = XPC_DISENGAGE_REQUEST_DEFAULT_TIMELIMIT;
-static int xpc_disengage_request_min_timelimit = 0;
-static int xpc_disengage_request_max_timelimit = 120;
-
-static ctl_table xpc_sys_xpc_hb_dir[] = {
-	{
-		.ctl_name 	= CTL_UNNUMBERED,
-		.procname	= "hb_interval",
-		.data		= &xpc_hb_interval,
-		.maxlen		= sizeof(int),
-		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_minmax,
-		.strategy	= &sysctl_intvec,
-		.extra1		= &xpc_hb_min_interval,
-		.extra2		= &xpc_hb_max_interval
-	},
-	{
-		.ctl_name	= CTL_UNNUMBERED,
-		.procname	= "hb_check_interval",
-		.data		= &xpc_hb_check_interval,
-		.maxlen		= sizeof(int),
-		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_minmax,
-		.strategy	= &sysctl_intvec,
-		.extra1		= &xpc_hb_check_min_interval,
-		.extra2		= &xpc_hb_check_max_interval
-	},
-	{}
-};
-static ctl_table xpc_sys_xpc_dir[] = {
-	{
-		.ctl_name	= CTL_UNNUMBERED,
-		.procname	= "hb",
-		.mode		= 0555,
-		.child		= xpc_sys_xpc_hb_dir
-	},
-	{
-		.ctl_name	= CTL_UNNUMBERED,
-		.procname	= "disengage_request_timelimit",
-		.data		= &xpc_disengage_request_timelimit,
-		.maxlen		= sizeof(int),
-		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_minmax,
-		.strategy	= &sysctl_intvec,
-		.extra1		= &xpc_disengage_request_min_timelimit,
-		.extra2		= &xpc_disengage_request_max_timelimit
-	},
-	{}
-};
-static ctl_table xpc_sys_dir[] = {
-	{
-		.ctl_name	= CTL_UNNUMBERED,
-		.procname	= "xpc",
-		.mode		= 0555,
-		.child		= xpc_sys_xpc_dir
-	},
-	{}
-};
-static struct ctl_table_header *xpc_sysctl;
-
-/* non-zero if any remote partition disengage request was timed out */
-int xpc_disengage_request_timedout;
-
-/* #of IRQs received */
-static atomic_t xpc_act_IRQ_rcvd;
-
-/* IRQ handler notifies this wait queue on receipt of an IRQ */
-static DECLARE_WAIT_QUEUE_HEAD(xpc_act_IRQ_wq);
-
-static unsigned long xpc_hb_check_timeout;
-
-/* notification that the xpc_hb_checker thread has exited */
-static DECLARE_COMPLETION(xpc_hb_checker_exited);
-
-/* notification that the xpc_discovery thread has exited */
-static DECLARE_COMPLETION(xpc_discovery_exited);
-
-
-static struct timer_list xpc_hb_timer;
-
-
-static void xpc_kthread_waitmsgs(struct xpc_partition *, struct xpc_channel *);
-
-
-static int xpc_system_reboot(struct notifier_block *, unsigned long, void *);
-static struct notifier_block xpc_reboot_notifier = {
-	.notifier_call = xpc_system_reboot,
-};
-
-static int xpc_system_die(struct notifier_block *, unsigned long, void *);
-static struct notifier_block xpc_die_notifier = {
-	.notifier_call = xpc_system_die,
-};
-
-
-/*
- * Timer function to enforce the timelimit on the partition disengage request.
- */
-static void
-xpc_timeout_partition_disengage_request(unsigned long data)
-{
-	struct xpc_partition *part = (struct xpc_partition *) data;
-
-
-	DBUG_ON(time_before(jiffies, part->disengage_request_timeout));
-
-	(void) xpc_partition_disengaged(part);
-
-	DBUG_ON(part->disengage_request_timeout != 0);
-	DBUG_ON(xpc_partition_engaged(1UL << XPC_PARTID(part)) != 0);
-}
-
-
-/*
- * Notify the heartbeat check thread that an IRQ has been received.
- */
-static irqreturn_t
-xpc_act_IRQ_handler(int irq, void *dev_id)
-{
-	atomic_inc(&xpc_act_IRQ_rcvd);
-	wake_up_interruptible(&xpc_act_IRQ_wq);
-	return IRQ_HANDLED;
-}
-
-
-/*
- * Timer to produce the heartbeat.  The timer structures function is
- * already set when this is initially called.  A tunable is used to
- * specify when the next timeout should occur.
- */
-static void
-xpc_hb_beater(unsigned long dummy)
-{
-	xpc_vars->heartbeat++;
-
-	if (time_after_eq(jiffies, xpc_hb_check_timeout)) {
-		wake_up_interruptible(&xpc_act_IRQ_wq);
-	}
-
-	xpc_hb_timer.expires = jiffies + (xpc_hb_interval * HZ);
-	add_timer(&xpc_hb_timer);
-}
-
-
-/*
- * This thread is responsible for nearly all of the partition
- * activation/deactivation.
- */
-static int
-xpc_hb_checker(void *ignore)
-{
-	int last_IRQ_count = 0;
-	int new_IRQ_count;
-	int force_IRQ=0;
-
-
-	/* this thread was marked active by xpc_hb_init() */
-
-	daemonize(XPC_HB_CHECK_THREAD_NAME);
-
-	set_cpus_allowed(current, cpumask_of_cpu(XPC_HB_CHECK_CPU));
-
-	/* set our heartbeating to other partitions into motion */
-	xpc_hb_check_timeout = jiffies + (xpc_hb_check_interval * HZ);
-	xpc_hb_beater(0);
-
-	while (!(volatile int) xpc_exiting) {
-
-		dev_dbg(xpc_part, "woke up with %d ticks rem; %d IRQs have "
-			"been received\n",
-			(int) (xpc_hb_check_timeout - jiffies),
-			atomic_read(&xpc_act_IRQ_rcvd) - last_IRQ_count);
-
-
-		/* checking of remote heartbeats is skewed by IRQ handling */
-		if (time_after_eq(jiffies, xpc_hb_check_timeout)) {
-			dev_dbg(xpc_part, "checking remote heartbeats\n");
-			xpc_check_remote_hb();
-
-			/*
-			 * We need to periodically recheck to ensure no
-			 * IPI/AMO pairs have been missed.  That check
-			 * must always reset xpc_hb_check_timeout.
-			 */
-			force_IRQ = 1;
-		}
-
-
-		/* check for outstanding IRQs */
-		new_IRQ_count = atomic_read(&xpc_act_IRQ_rcvd);
-		if (last_IRQ_count < new_IRQ_count || force_IRQ != 0) {
-			force_IRQ = 0;
-
-			dev_dbg(xpc_part, "found an IRQ to process; will be "
-				"resetting xpc_hb_check_timeout\n");
-
-			last_IRQ_count += xpc_identify_act_IRQ_sender();
-			if (last_IRQ_count < new_IRQ_count) {
-				/* retry once to help avoid missing AMO */
-				(void) xpc_identify_act_IRQ_sender();
-			}
-			last_IRQ_count = new_IRQ_count;
-
-			xpc_hb_check_timeout = jiffies +
-					   (xpc_hb_check_interval * HZ);
-		}
-
-		/* wait for IRQ or timeout */
-		(void) wait_event_interruptible(xpc_act_IRQ_wq,
-			    (last_IRQ_count < atomic_read(&xpc_act_IRQ_rcvd) ||
-					time_after_eq(jiffies, xpc_hb_check_timeout) ||
-						(volatile int) xpc_exiting));
-	}
-
-	dev_dbg(xpc_part, "heartbeat checker is exiting\n");
-
-
-	/* mark this thread as having exited */
-	complete(&xpc_hb_checker_exited);
-	return 0;
-}
-
-
-/*
- * This thread will attempt to discover other partitions to activate
- * based on info provided by SAL. This new thread is short lived and
- * will exit once discovery is complete.
- */
-static int
-xpc_initiate_discovery(void *ignore)
-{
-	daemonize(XPC_DISCOVERY_THREAD_NAME);
-
-	xpc_discovery();
-
-	dev_dbg(xpc_part, "discovery thread is exiting\n");
-
-	/* mark this thread as having exited */
-	complete(&xpc_discovery_exited);
-	return 0;
-}
-
-
-/*
- * Establish first contact with the remote partititon. This involves pulling
- * the XPC per partition variables from the remote partition and waiting for
- * the remote partition to pull ours.
- */
-static enum xpc_retval
-xpc_make_first_contact(struct xpc_partition *part)
-{
-	enum xpc_retval ret;
-
-
-	while ((ret = xpc_pull_remote_vars_part(part)) != xpcSuccess) {
-		if (ret != xpcRetry) {
-			XPC_DEACTIVATE_PARTITION(part, ret);
-			return ret;
-		}
-
-		dev_dbg(xpc_chan, "waiting to make first contact with "
-			"partition %d\n", XPC_PARTID(part));
-
-		/* wait a 1/4 of a second or so */
-		(void) msleep_interruptible(250);
-
-		if (part->act_state == XPC_P_DEACTIVATING) {
-			return part->reason;
-		}
-	}
-
-	return xpc_mark_partition_active(part);
-}
-
-
-/*
- * The first kthread assigned to a newly activated partition is the one
- * created by XPC HB with which it calls xpc_partition_up(). XPC hangs on to
- * that kthread until the partition is brought down, at which time that kthread
- * returns back to XPC HB. (The return of that kthread will signify to XPC HB
- * that XPC has dismantled all communication infrastructure for the associated
- * partition.) This kthread becomes the channel manager for that partition.
- *
- * Each active partition has a channel manager, who, besides connecting and
- * disconnecting channels, will ensure that each of the partition's connected
- * channels has the required number of assigned kthreads to get the work done.
- */
-static void
-xpc_channel_mgr(struct xpc_partition *part)
-{
-	while (part->act_state != XPC_P_DEACTIVATING ||
-			atomic_read(&part->nchannels_active) > 0 ||
-					!xpc_partition_disengaged(part)) {
-
-		xpc_process_channel_activity(part);
-
-
-		/*
-		 * Wait until we've been requested to activate kthreads or
-		 * all of the channel's message queues have been torn down or
-		 * a signal is pending.
-		 *
-		 * The channel_mgr_requests is set to 1 after being awakened,
-		 * This is done to prevent the channel mgr from making one pass
-		 * through the loop for each request, since he will
-		 * be servicing all the requests in one pass. The reason it's
-		 * set to 1 instead of 0 is so that other kthreads will know
-		 * that the channel mgr is running and won't bother trying to
-		 * wake him up.
-		 */
-		atomic_dec(&part->channel_mgr_requests);
-		(void) wait_event_interruptible(part->channel_mgr_wq,
-				(atomic_read(&part->channel_mgr_requests) > 0 ||
-				(volatile u64) part->local_IPI_amo != 0 ||
-				((volatile u8) part->act_state ==
-							XPC_P_DEACTIVATING &&
-				atomic_read(&part->nchannels_active) == 0 &&
-				xpc_partition_disengaged(part))));
-		atomic_set(&part->channel_mgr_requests, 1);
-
-		// >>> Does it need to wakeup periodically as well? In case we
-		// >>> miscalculated the #of kthreads to wakeup or create?
-	}
-}
-
-
-/*
- * When XPC HB determines that a partition has come up, it will create a new
- * kthread and that kthread will call this function to attempt to set up the
- * basic infrastructure used for Cross Partition Communication with the newly
- * upped partition.
- *
- * The kthread that was created by XPC HB and which setup the XPC
- * infrastructure will remain assigned to the partition until the partition
- * goes down. At which time the kthread will teardown the XPC infrastructure
- * and then exit.
- *
- * XPC HB will put the remote partition's XPC per partition specific variables
- * physical address into xpc_partitions[partid].remote_vars_part_pa prior to
- * calling xpc_partition_up().
- */
-static void
-xpc_partition_up(struct xpc_partition *part)
-{
-	DBUG_ON(part->channels != NULL);
-
-	dev_dbg(xpc_chan, "activating partition %d\n", XPC_PARTID(part));
-
-	if (xpc_setup_infrastructure(part) != xpcSuccess) {
-		return;
-	}
-
-	/*
-	 * The kthread that XPC HB called us with will become the
-	 * channel manager for this partition. It will not return
-	 * back to XPC HB until the partition's XPC infrastructure
-	 * has been dismantled.
-	 */
-
-	(void) xpc_part_ref(part);	/* this will always succeed */
-
-	if (xpc_make_first_contact(part) == xpcSuccess) {
-		xpc_channel_mgr(part);
-	}
-
-	xpc_part_deref(part);
-
-	xpc_teardown_infrastructure(part);
-}
-
-
-static int
-xpc_activating(void *__partid)
-{
-	partid_t partid = (u64) __partid;
-	struct xpc_partition *part = &xpc_partitions[partid];
-	unsigned long irq_flags;
-	struct sched_param param = { .sched_priority = MAX_RT_PRIO - 1 };
-	int ret;
-
-
-	DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
-
-	spin_lock_irqsave(&part->act_lock, irq_flags);
-
-	if (part->act_state == XPC_P_DEACTIVATING) {
-		part->act_state = XPC_P_INACTIVE;
-		spin_unlock_irqrestore(&part->act_lock, irq_flags);
-		part->remote_rp_pa = 0;
-		return 0;
-	}
-
-	/* indicate the thread is activating */
-	DBUG_ON(part->act_state != XPC_P_ACTIVATION_REQ);
-	part->act_state = XPC_P_ACTIVATING;
-
-	XPC_SET_REASON(part, 0, 0);
-	spin_unlock_irqrestore(&part->act_lock, irq_flags);
-
-	dev_dbg(xpc_part, "bringing partition %d up\n", partid);
-
-	daemonize("xpc%02d", partid);
-
-	/*
-	 * This thread needs to run at a realtime priority to prevent a
-	 * significant performance degradation.
-	 */
-	ret = sched_setscheduler(current, SCHED_FIFO, &param);
-	if (ret != 0) {
-		dev_warn(xpc_part, "unable to set pid %d to a realtime "
-			"priority, ret=%d\n", current->pid, ret);
-	}
-
-	/* allow this thread and its children to run on any CPU */
-	set_cpus_allowed(current, CPU_MASK_ALL);
-
-	/*
-	 * Register the remote partition's AMOs with SAL so it can handle
-	 * and cleanup errors within that address range should the remote
-	 * partition go down. We don't unregister this range because it is
-	 * difficult to tell when outstanding writes to the remote partition
-	 * are finished and thus when it is safe to unregister. This should
-	 * not result in wasted space in the SAL xp_addr_region table because
-	 * we should get the same page for remote_amos_page_pa after module
-	 * reloads and system reboots.
-	 */
-	if (sn_register_xp_addr_region(part->remote_amos_page_pa,
-							PAGE_SIZE, 1) < 0) {
-		dev_warn(xpc_part, "xpc_partition_up(%d) failed to register "
-			"xp_addr region\n", partid);
-
-		spin_lock_irqsave(&part->act_lock, irq_flags);
-		part->act_state = XPC_P_INACTIVE;
-		XPC_SET_REASON(part, xpcPhysAddrRegFailed, __LINE__);
-		spin_unlock_irqrestore(&part->act_lock, irq_flags);
-		part->remote_rp_pa = 0;
-		return 0;
-	}
-
-	xpc_allow_hb(partid, xpc_vars);
-	xpc_IPI_send_activated(part);
-
-
-	/*
-	 * xpc_partition_up() holds this thread and marks this partition as
-	 * XPC_P_ACTIVE by calling xpc_hb_mark_active().
-	 */
-	(void) xpc_partition_up(part);
-
-	xpc_disallow_hb(partid, xpc_vars);
-	xpc_mark_partition_inactive(part);
-
-	if (part->reason == xpcReactivating) {
-		/* interrupting ourselves results in activating partition */
-		xpc_IPI_send_reactivate(part);
-	}
-
-	return 0;
-}
-
-
-void
-xpc_activate_partition(struct xpc_partition *part)
-{
-	partid_t partid = XPC_PARTID(part);
-	unsigned long irq_flags;
-	pid_t pid;
-
-
-	spin_lock_irqsave(&part->act_lock, irq_flags);
-
-	DBUG_ON(part->act_state != XPC_P_INACTIVE);
-
-	part->act_state = XPC_P_ACTIVATION_REQ;
-	XPC_SET_REASON(part, xpcCloneKThread, __LINE__);
-
-	spin_unlock_irqrestore(&part->act_lock, irq_flags);
-
-	pid = kernel_thread(xpc_activating, (void *) ((u64) partid), 0);
-
-	if (unlikely(pid <= 0)) {
-		spin_lock_irqsave(&part->act_lock, irq_flags);
-		part->act_state = XPC_P_INACTIVE;
-		XPC_SET_REASON(part, xpcCloneKThreadFailed, __LINE__);
-		spin_unlock_irqrestore(&part->act_lock, irq_flags);
-	}
-}
-
-
-/*
- * Handle the receipt of a SGI_XPC_NOTIFY IRQ by seeing whether the specified
- * partition actually sent it. Since SGI_XPC_NOTIFY IRQs may be shared by more
- * than one partition, we use an AMO_t structure per partition to indicate
- * whether a partition has sent an IPI or not.  >>> If it has, then wake up the
- * associated kthread to handle it.
- *
- * All SGI_XPC_NOTIFY IRQs received by XPC are the result of IPIs sent by XPC
- * running on other partitions.
- *
- * Noteworthy Arguments:
- *
- *	irq - Interrupt ReQuest number. NOT USED.
- *
- *	dev_id - partid of IPI's potential sender.
- */
-irqreturn_t
-xpc_notify_IRQ_handler(int irq, void *dev_id)
-{
-	partid_t partid = (partid_t) (u64) dev_id;
-	struct xpc_partition *part = &xpc_partitions[partid];
-
-
-	DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
-
-	if (xpc_part_ref(part)) {
-		xpc_check_for_channel_activity(part);
-
-		xpc_part_deref(part);
-	}
-	return IRQ_HANDLED;
-}
-
-
-/*
- * Check to see if xpc_notify_IRQ_handler() dropped any IPIs on the floor
- * because the write to their associated IPI amo completed after the IRQ/IPI
- * was received.
- */
-void
-xpc_dropped_IPI_check(struct xpc_partition *part)
-{
-	if (xpc_part_ref(part)) {
-		xpc_check_for_channel_activity(part);
-
-		part->dropped_IPI_timer.expires = jiffies +
-							XPC_P_DROPPED_IPI_WAIT;
-		add_timer(&part->dropped_IPI_timer);
-		xpc_part_deref(part);
-	}
-}
-
-
-void
-xpc_activate_kthreads(struct xpc_channel *ch, int needed)
-{
-	int idle = atomic_read(&ch->kthreads_idle);
-	int assigned = atomic_read(&ch->kthreads_assigned);
-	int wakeup;
-
-
-	DBUG_ON(needed <= 0);
-
-	if (idle > 0) {
-		wakeup = (needed > idle) ? idle : needed;
-		needed -= wakeup;
-
-		dev_dbg(xpc_chan, "wakeup %d idle kthreads, partid=%d, "
-			"channel=%d\n", wakeup, ch->partid, ch->number);
-
-		/* only wakeup the requested number of kthreads */
-		wake_up_nr(&ch->idle_wq, wakeup);
-	}
-
-	if (needed <= 0) {
-		return;
-	}
-
-	if (needed + assigned > ch->kthreads_assigned_limit) {
-		needed = ch->kthreads_assigned_limit - assigned;
-		// >>>should never be less than 0
-		if (needed <= 0) {
-			return;
-		}
-	}
-
-	dev_dbg(xpc_chan, "create %d new kthreads, partid=%d, channel=%d\n",
-		needed, ch->partid, ch->number);
-
-	xpc_create_kthreads(ch, needed, 0);
-}
-
-
-/*
- * This function is where XPC's kthreads wait for messages to deliver.
- */
-static void
-xpc_kthread_waitmsgs(struct xpc_partition *part, struct xpc_channel *ch)
-{
-	do {
-		/* deliver messages to their intended recipients */
-
-		while ((volatile s64) ch->w_local_GP.get <
-				(volatile s64) ch->w_remote_GP.put &&
-					!((volatile u32) ch->flags &
-						XPC_C_DISCONNECTING)) {
-			xpc_deliver_msg(ch);
-		}
-
-		if (atomic_inc_return(&ch->kthreads_idle) >
-						ch->kthreads_idle_limit) {
-			/* too many idle kthreads on this channel */
-			atomic_dec(&ch->kthreads_idle);
-			break;
-		}
-
-		dev_dbg(xpc_chan, "idle kthread calling "
-			"wait_event_interruptible_exclusive()\n");
-
-		(void) wait_event_interruptible_exclusive(ch->idle_wq,
-				((volatile s64) ch->w_local_GP.get <
-					(volatile s64) ch->w_remote_GP.put ||
-				((volatile u32) ch->flags &
-						XPC_C_DISCONNECTING)));
-
-		atomic_dec(&ch->kthreads_idle);
-
-	} while (!((volatile u32) ch->flags & XPC_C_DISCONNECTING));
-}
-
-
-static int
-xpc_daemonize_kthread(void *args)
-{
-	partid_t partid = XPC_UNPACK_ARG1(args);
-	u16 ch_number = XPC_UNPACK_ARG2(args);
-	struct xpc_partition *part = &xpc_partitions[partid];
-	struct xpc_channel *ch;
-	int n_needed;
-	unsigned long irq_flags;
-
-
-	daemonize("xpc%02dc%d", partid, ch_number);
-
-	dev_dbg(xpc_chan, "kthread starting, partid=%d, channel=%d\n",
-		partid, ch_number);
-
-	ch = &part->channels[ch_number];
-
-	if (!(ch->flags & XPC_C_DISCONNECTING)) {
-
-		/* let registerer know that connection has been established */
-
-		spin_lock_irqsave(&ch->lock, irq_flags);
-		if (!(ch->flags & XPC_C_CONNECTEDCALLOUT)) {
-			ch->flags |= XPC_C_CONNECTEDCALLOUT;
-			spin_unlock_irqrestore(&ch->lock, irq_flags);
-
-			xpc_connected_callout(ch);
-
-			spin_lock_irqsave(&ch->lock, irq_flags);
-			ch->flags |= XPC_C_CONNECTEDCALLOUT_MADE;
-			spin_unlock_irqrestore(&ch->lock, irq_flags);
-
-			/*
-			 * It is possible that while the callout was being
-			 * made that the remote partition sent some messages.
-			 * If that is the case, we may need to activate
-			 * additional kthreads to help deliver them. We only
-			 * need one less than total #of messages to deliver.
-			 */
-			n_needed = ch->w_remote_GP.put - ch->w_local_GP.get - 1;
-			if (n_needed > 0 &&
-					!(ch->flags & XPC_C_DISCONNECTING)) {
-				xpc_activate_kthreads(ch, n_needed);
-			}
-		} else {
-			spin_unlock_irqrestore(&ch->lock, irq_flags);
-		}
-
-		xpc_kthread_waitmsgs(part, ch);
-	}
-
-	/* let registerer know that connection is disconnecting */
-
-	spin_lock_irqsave(&ch->lock, irq_flags);
-	if ((ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) &&
-			!(ch->flags & XPC_C_DISCONNECTINGCALLOUT)) {
-		ch->flags |= XPC_C_DISCONNECTINGCALLOUT;
-		spin_unlock_irqrestore(&ch->lock, irq_flags);
-
-		xpc_disconnect_callout(ch, xpcDisconnecting);
-
-		spin_lock_irqsave(&ch->lock, irq_flags);
-		ch->flags |= XPC_C_DISCONNECTINGCALLOUT_MADE;
-	}
-	spin_unlock_irqrestore(&ch->lock, irq_flags);
-
-	if (atomic_dec_return(&ch->kthreads_assigned) == 0) {
-		if (atomic_dec_return(&part->nchannels_engaged) == 0) {
-			xpc_mark_partition_disengaged(part);
-			xpc_IPI_send_disengage(part);
-		}
-	}
-
-	xpc_msgqueue_deref(ch);
-
-	dev_dbg(xpc_chan, "kthread exiting, partid=%d, channel=%d\n",
-		partid, ch_number);
-
-	xpc_part_deref(part);
-	return 0;
-}
-
-
-/*
- * For each partition that XPC has established communications with, there is
- * a minimum of one kernel thread assigned to perform any operation that
- * may potentially sleep or block (basically the callouts to the asynchronous
- * functions registered via xpc_connect()).
- *
- * Additional kthreads are created and destroyed by XPC as the workload
- * demands.
- *
- * A kthread is assigned to one of the active channels that exists for a given
- * partition.
- */
-void
-xpc_create_kthreads(struct xpc_channel *ch, int needed,
-			int ignore_disconnecting)
-{
-	unsigned long irq_flags;
-	pid_t pid;
-	u64 args = XPC_PACK_ARGS(ch->partid, ch->number);
-	struct xpc_partition *part = &xpc_partitions[ch->partid];
-
-
-	while (needed-- > 0) {
-
-		/*
-		 * The following is done on behalf of the newly created
-		 * kthread. That kthread is responsible for doing the
-		 * counterpart to the following before it exits.
-		 */
-		if (ignore_disconnecting) {
-			if (!atomic_inc_not_zero(&ch->kthreads_assigned)) {
-				/* kthreads assigned had gone to zero */
-				BUG_ON(!(ch->flags &
-					XPC_C_DISCONNECTINGCALLOUT_MADE));
-				break;
-			}
-
-		} else if (ch->flags & XPC_C_DISCONNECTING) {
-			break;
-
-		} else if (atomic_inc_return(&ch->kthreads_assigned) == 1) {
-			if (atomic_inc_return(&part->nchannels_engaged) == 1)
-				xpc_mark_partition_engaged(part);
-		}
-		(void) xpc_part_ref(part);
-		xpc_msgqueue_ref(ch);
-
-		pid = kernel_thread(xpc_daemonize_kthread, (void *) args, 0);
-		if (pid < 0) {
-			/* the fork failed */
-
-			/*
-			 * NOTE: if (ignore_disconnecting &&
-			 * !(ch->flags & XPC_C_DISCONNECTINGCALLOUT)) is true,
-			 * then we'll deadlock if all other kthreads assigned
-			 * to this channel are blocked in the channel's
-			 * registerer, because the only thing that will unblock
-			 * them is the xpcDisconnecting callout that this
-			 * failed kernel_thread would have made.
-			 */
-
-			if (atomic_dec_return(&ch->kthreads_assigned) == 0 &&
-			    atomic_dec_return(&part->nchannels_engaged) == 0) {
-				xpc_mark_partition_disengaged(part);
-				xpc_IPI_send_disengage(part);
-			}
-			xpc_msgqueue_deref(ch);
-			xpc_part_deref(part);
-
-			if (atomic_read(&ch->kthreads_assigned) <
-						ch->kthreads_idle_limit) {
-				/*
-				 * Flag this as an error only if we have an
-				 * insufficient #of kthreads for the channel
-				 * to function.
-				 */
-				spin_lock_irqsave(&ch->lock, irq_flags);
-				XPC_DISCONNECT_CHANNEL(ch, xpcLackOfResources,
-								&irq_flags);
-				spin_unlock_irqrestore(&ch->lock, irq_flags);
-			}
-			break;
-		}
-
-		ch->kthreads_created++;	// >>> temporary debug only!!!
-	}
-}
-
-
-void
-xpc_disconnect_wait(int ch_number)
-{
-	unsigned long irq_flags;
-	partid_t partid;
-	struct xpc_partition *part;
-	struct xpc_channel *ch;
-	int wakeup_channel_mgr;
-
-
-	/* now wait for all callouts to the caller's function to cease */
-	for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
-		part = &xpc_partitions[partid];
-
-		if (!xpc_part_ref(part)) {
-			continue;
-		}
-
-		ch = &part->channels[ch_number];
-
-		if (!(ch->flags & XPC_C_WDISCONNECT)) {
-			xpc_part_deref(part);
-			continue;
-		}
-
-		wait_for_completion(&ch->wdisconnect_wait);
-
-		spin_lock_irqsave(&ch->lock, irq_flags);
-		DBUG_ON(!(ch->flags & XPC_C_DISCONNECTED));
-		wakeup_channel_mgr = 0;
-
-		if (ch->delayed_IPI_flags) {
-			if (part->act_state != XPC_P_DEACTIVATING) {
-				spin_lock(&part->IPI_lock);
-				XPC_SET_IPI_FLAGS(part->local_IPI_amo,
-					ch->number, ch->delayed_IPI_flags);
-				spin_unlock(&part->IPI_lock);
-				wakeup_channel_mgr = 1;
-			}
-			ch->delayed_IPI_flags = 0;
-		}
-
-		ch->flags &= ~XPC_C_WDISCONNECT;
-		spin_unlock_irqrestore(&ch->lock, irq_flags);
-
-		if (wakeup_channel_mgr) {
-			xpc_wakeup_channel_mgr(part);
-		}
-
-		xpc_part_deref(part);
-	}
-}
-
-
-static void
-xpc_do_exit(enum xpc_retval reason)
-{
-	partid_t partid;
-	int active_part_count, printed_waiting_msg = 0;
-	struct xpc_partition *part;
-	unsigned long printmsg_time, disengage_request_timeout = 0;
-
-
-	/* a 'rmmod XPC' and a 'reboot' cannot both end up here together */
-	DBUG_ON(xpc_exiting == 1);
-
-	/*
-	 * Let the heartbeat checker thread and the discovery thread
-	 * (if one is running) know that they should exit. Also wake up
-	 * the heartbeat checker thread in case it's sleeping.
-	 */
-	xpc_exiting = 1;
-	wake_up_interruptible(&xpc_act_IRQ_wq);
-
-	/* ignore all incoming interrupts */
-	free_irq(SGI_XPC_ACTIVATE, NULL);
-
-	/* wait for the discovery thread to exit */
-	wait_for_completion(&xpc_discovery_exited);
-
-	/* wait for the heartbeat checker thread to exit */
-	wait_for_completion(&xpc_hb_checker_exited);
-
-
-	/* sleep for a 1/3 of a second or so */
-	(void) msleep_interruptible(300);
-
-
-	/* wait for all partitions to become inactive */
-
-	printmsg_time = jiffies + (XPC_DISENGAGE_PRINTMSG_INTERVAL * HZ);
-	xpc_disengage_request_timedout = 0;
-
-	do {
-		active_part_count = 0;
-
-		for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
-			part = &xpc_partitions[partid];
-
-			if (xpc_partition_disengaged(part) &&
-					part->act_state == XPC_P_INACTIVE) {
-				continue;
-			}
-
-			active_part_count++;
-
-			XPC_DEACTIVATE_PARTITION(part, reason);
-
-			if (part->disengage_request_timeout >
-						disengage_request_timeout) {
-				disengage_request_timeout =
-						part->disengage_request_timeout;
-			}
-		}
-
-		if (xpc_partition_engaged(-1UL)) {
-			if (time_after(jiffies, printmsg_time)) {
-				dev_info(xpc_part, "waiting for remote "
-					"partitions to disengage, timeout in "
-					"%ld seconds\n",
-					(disengage_request_timeout - jiffies)
-									/ HZ);
-				printmsg_time = jiffies +
-					(XPC_DISENGAGE_PRINTMSG_INTERVAL * HZ);
-				printed_waiting_msg = 1;
-			}
-
-		} else if (active_part_count > 0) {
-			if (printed_waiting_msg) {
-				dev_info(xpc_part, "waiting for local partition"
-					" to disengage\n");
-				printed_waiting_msg = 0;
-			}
-
-		} else {
-			if (!xpc_disengage_request_timedout) {
-				dev_info(xpc_part, "all partitions have "
-					"disengaged\n");
-			}
-			break;
-		}
-
-		/* sleep for a 1/3 of a second or so */
-		(void) msleep_interruptible(300);
-
-	} while (1);
-
-	DBUG_ON(xpc_partition_engaged(-1UL));
-
-
-	/* indicate to others that our reserved page is uninitialized */
-	xpc_rsvd_page->vars_pa = 0;
-
-	/* now it's time to eliminate our heartbeat */
-	del_timer_sync(&xpc_hb_timer);
-	DBUG_ON(xpc_vars->heartbeating_to_mask != 0);
-
-	if (reason == xpcUnloading) {
-		/* take ourselves off of the reboot_notifier_list */
-		(void) unregister_reboot_notifier(&xpc_reboot_notifier);
-
-		/* take ourselves off of the die_notifier list */
-		(void) unregister_die_notifier(&xpc_die_notifier);
-	}
-
-	/* close down protections for IPI operations */
-	xpc_restrict_IPI_ops();
-
-
-	/* clear the interface to XPC's functions */
-	xpc_clear_interface();
-
-	if (xpc_sysctl) {
-		unregister_sysctl_table(xpc_sysctl);
-	}
-
-	kfree(xpc_remote_copy_buffer_base);
-}
-
-
-/*
- * This function is called when the system is being rebooted.
- */
-static int
-xpc_system_reboot(struct notifier_block *nb, unsigned long event, void *unused)
-{
-	enum xpc_retval reason;
-
-
-	switch (event) {
-	case SYS_RESTART:
-		reason = xpcSystemReboot;
-		break;
-	case SYS_HALT:
-		reason = xpcSystemHalt;
-		break;
-	case SYS_POWER_OFF:
-		reason = xpcSystemPoweroff;
-		break;
-	default:
-		reason = xpcSystemGoingDown;
-	}
-
-	xpc_do_exit(reason);
-	return NOTIFY_DONE;
-}
-
-
-/*
- * Notify other partitions to disengage from all references to our memory.
- */
-static void
-xpc_die_disengage(void)
-{
-	struct xpc_partition *part;
-	partid_t partid;
-	unsigned long engaged;
-	long time, printmsg_time, disengage_request_timeout;
-
-
-	/* keep xpc_hb_checker thread from doing anything (just in case) */
-	xpc_exiting = 1;
-
-	xpc_vars->heartbeating_to_mask = 0;  /* indicate we're deactivated */
-
-	for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
-		part = &xpc_partitions[partid];
-
-		if (!XPC_SUPPORTS_DISENGAGE_REQUEST(part->
-							remote_vars_version)) {
-
-			/* just in case it was left set by an earlier XPC */
-			xpc_clear_partition_engaged(1UL << partid);
-			continue;
-		}
-
-		if (xpc_partition_engaged(1UL << partid) ||
-					part->act_state != XPC_P_INACTIVE) {
-			xpc_request_partition_disengage(part);
-			xpc_mark_partition_disengaged(part);
-			xpc_IPI_send_disengage(part);
-		}
-	}
-
-	time = rtc_time();
-	printmsg_time = time +
-		(XPC_DISENGAGE_PRINTMSG_INTERVAL * sn_rtc_cycles_per_second);
-	disengage_request_timeout = time +
-		(xpc_disengage_request_timelimit * sn_rtc_cycles_per_second);
-
-	/* wait for all other partitions to disengage from us */
-
-	while (1) {
-		engaged = xpc_partition_engaged(-1UL);
-		if (!engaged) {
-			dev_info(xpc_part, "all partitions have disengaged\n");
-			break;
-		}
-
-		time = rtc_time();
-		if (time >= disengage_request_timeout) {
-			for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
-				if (engaged & (1UL << partid)) {
-					dev_info(xpc_part, "disengage from "
-						"remote partition %d timed "
-						"out\n", partid);
-				}
-			}
-			break;
-		}
-
-		if (time >= printmsg_time) {
-			dev_info(xpc_part, "waiting for remote partitions to "
-				"disengage, timeout in %ld seconds\n",
-				(disengage_request_timeout - time) /
-						sn_rtc_cycles_per_second);
-			printmsg_time = time +
-					(XPC_DISENGAGE_PRINTMSG_INTERVAL *
-						sn_rtc_cycles_per_second);
-		}
-	}
-}
-
-
-/*
- * 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)
-{
-	switch (event) {
-	case DIE_MACHINE_RESTART:
-	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++;
-		xpc_vars->heartbeat_offline = 0;
-		break;
-	}
-
-	return NOTIFY_DONE;
-}
-
-
-int __init
-xpc_init(void)
-{
-	int ret;
-	partid_t partid;
-	struct xpc_partition *part;
-	pid_t pid;
-	size_t buf_size;
-
-
-	if (!ia64_platform_is("sn2")) {
-		return -ENODEV;
-	}
-
-
-	buf_size = max(XPC_RP_VARS_SIZE,
-				XPC_RP_HEADER_SIZE + XP_NASID_MASK_BYTES);
-	xpc_remote_copy_buffer = xpc_kmalloc_cacheline_aligned(buf_size,
-				     GFP_KERNEL, &xpc_remote_copy_buffer_base);
-	if (xpc_remote_copy_buffer == NULL)
-		return -ENOMEM;
-
-	snprintf(xpc_part->bus_id, BUS_ID_SIZE, "part");
-	snprintf(xpc_chan->bus_id, BUS_ID_SIZE, "chan");
-
-	xpc_sysctl = register_sysctl_table(xpc_sys_dir);
-
-	/*
-	 * The first few fields of each entry of xpc_partitions[] need to
-	 * be initialized now so that calls to xpc_connect() and
-	 * xpc_disconnect() can be made prior to the activation of any remote
-	 * partition. NOTE THAT NONE OF THE OTHER FIELDS BELONGING TO THESE
-	 * ENTRIES ARE MEANINGFUL UNTIL AFTER AN ENTRY'S CORRESPONDING
-	 * PARTITION HAS BEEN ACTIVATED.
-	 */
-	for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
-		part = &xpc_partitions[partid];
-
-		DBUG_ON((u64) part != L1_CACHE_ALIGN((u64) part));
-
-		part->act_IRQ_rcvd = 0;
-		spin_lock_init(&part->act_lock);
-		part->act_state = XPC_P_INACTIVE;
-		XPC_SET_REASON(part, 0, 0);
-
-		init_timer(&part->disengage_request_timer);
-		part->disengage_request_timer.function =
-				xpc_timeout_partition_disengage_request;
-		part->disengage_request_timer.data = (unsigned long) part;
-
-		part->setup_state = XPC_P_UNSET;
-		init_waitqueue_head(&part->teardown_wq);
-		atomic_set(&part->references, 0);
-	}
-
-	/*
-	 * Open up protections for IPI operations (and AMO operations on
-	 * Shub 1.1 systems).
-	 */
-	xpc_allow_IPI_ops();
-
-	/*
-	 * Interrupts being processed will increment this atomic variable and
-	 * awaken the heartbeat thread which will process the interrupts.
-	 */
-	atomic_set(&xpc_act_IRQ_rcvd, 0);
-
-	/*
-	 * This is safe to do before the xpc_hb_checker thread has started
-	 * because the handler releases a wait queue.  If an interrupt is
-	 * received before the thread is waiting, it will not go to sleep,
-	 * but rather immediately process the interrupt.
-	 */
-	ret = request_irq(SGI_XPC_ACTIVATE, xpc_act_IRQ_handler, 0,
-							"xpc hb", NULL);
-	if (ret != 0) {
-		dev_err(xpc_part, "can't register ACTIVATE IRQ handler, "
-			"errno=%d\n", -ret);
-
-		xpc_restrict_IPI_ops();
-
-		if (xpc_sysctl) {
-			unregister_sysctl_table(xpc_sysctl);
-		}
-
-		kfree(xpc_remote_copy_buffer_base);
-		return -EBUSY;
-	}
-
-	/*
-	 * Fill the partition reserved page with the information needed by
-	 * other partitions to discover we are alive and establish initial
-	 * communications.
-	 */
-	xpc_rsvd_page = xpc_rsvd_page_init();
-	if (xpc_rsvd_page == NULL) {
-		dev_err(xpc_part, "could not setup our reserved page\n");
-
-		free_irq(SGI_XPC_ACTIVATE, NULL);
-		xpc_restrict_IPI_ops();
-
-		if (xpc_sysctl) {
-			unregister_sysctl_table(xpc_sysctl);
-		}
-
-		kfree(xpc_remote_copy_buffer_base);
-		return -EBUSY;
-	}
-
-
-	/* add ourselves to the reboot_notifier_list */
-	ret = register_reboot_notifier(&xpc_reboot_notifier);
-	if (ret != 0) {
-		dev_warn(xpc_part, "can't register reboot notifier\n");
-	}
-
-	/* add ourselves to the die_notifier list */
-	ret = register_die_notifier(&xpc_die_notifier);
-	if (ret != 0) {
-		dev_warn(xpc_part, "can't register die notifier\n");
-	}
-
-	init_timer(&xpc_hb_timer);
-	xpc_hb_timer.function = xpc_hb_beater;
-
-	/*
-	 * The real work-horse behind xpc.  This processes incoming
-	 * interrupts and monitors remote heartbeats.
-	 */
-	pid = kernel_thread(xpc_hb_checker, NULL, 0);
-	if (pid < 0) {
-		dev_err(xpc_part, "failed while forking hb check thread\n");
-
-		/* indicate to others that our reserved page is uninitialized */
-		xpc_rsvd_page->vars_pa = 0;
-
-		/* take ourselves off of the reboot_notifier_list */
-		(void) unregister_reboot_notifier(&xpc_reboot_notifier);
-
-		/* take ourselves off of the die_notifier list */
-		(void) unregister_die_notifier(&xpc_die_notifier);
-
-		del_timer_sync(&xpc_hb_timer);
-		free_irq(SGI_XPC_ACTIVATE, NULL);
-		xpc_restrict_IPI_ops();
-
-		if (xpc_sysctl) {
-			unregister_sysctl_table(xpc_sysctl);
-		}
-
-		kfree(xpc_remote_copy_buffer_base);
-		return -EBUSY;
-	}
-
-
-	/*
-	 * Startup a thread that will attempt to discover other partitions to
-	 * activate based on info provided by SAL. This new thread is short
-	 * lived and will exit once discovery is complete.
-	 */
-	pid = kernel_thread(xpc_initiate_discovery, NULL, 0);
-	if (pid < 0) {
-		dev_err(xpc_part, "failed while forking discovery thread\n");
-
-		/* mark this new thread as a non-starter */
-		complete(&xpc_discovery_exited);
-
-		xpc_do_exit(xpcUnloading);
-		return -EBUSY;
-	}
-
-
-	/* set the interface to point at XPC's functions */
-	xpc_set_interface(xpc_initiate_connect, xpc_initiate_disconnect,
-			  xpc_initiate_allocate, xpc_initiate_send,
-			  xpc_initiate_send_notify, xpc_initiate_received,
-			  xpc_initiate_partid_to_nasids);
-
-	return 0;
-}
-module_init(xpc_init);
-
-
-void __exit
-xpc_exit(void)
-{
-	xpc_do_exit(xpcUnloading);
-}
-module_exit(xpc_exit);
-
-
-MODULE_AUTHOR("Silicon Graphics, Inc.");
-MODULE_DESCRIPTION("Cross Partition Communication (XPC) support");
-MODULE_LICENSE("GPL");
-
-module_param(xpc_hb_interval, int, 0);
-MODULE_PARM_DESC(xpc_hb_interval, "Number of seconds between "
-		"heartbeat increments.");
-
-module_param(xpc_hb_check_interval, int, 0);
-MODULE_PARM_DESC(xpc_hb_check_interval, "Number of seconds between "
-		"heartbeat checks.");
-
-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.");
-