From db05fed0ad72f264e39bcb366795f7367384ec92 Mon Sep 17 00:00:00 2001 From: Jeremy Fitzhardinge Date: Tue, 24 Nov 2009 16:41:47 -0800 Subject: xen/xenbus: make DEVICE_ATTR()s static They don't need to be global, and may cause linker clashes. Signed-off-by: Jeremy Fitzhardinge Cc: Stable Kernel --- drivers/xen/xenbus/xenbus_probe.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers/xen') diff --git a/drivers/xen/xenbus/xenbus_probe.c b/drivers/xen/xenbus/xenbus_probe.c index d42e25d5968d..3800da7dabfe 100644 --- a/drivers/xen/xenbus/xenbus_probe.c +++ b/drivers/xen/xenbus/xenbus_probe.c @@ -454,21 +454,21 @@ static ssize_t xendev_show_nodename(struct device *dev, { return sprintf(buf, "%s\n", to_xenbus_device(dev)->nodename); } -DEVICE_ATTR(nodename, S_IRUSR | S_IRGRP | S_IROTH, xendev_show_nodename, NULL); +static DEVICE_ATTR(nodename, S_IRUSR | S_IRGRP | S_IROTH, xendev_show_nodename, NULL); static ssize_t xendev_show_devtype(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "%s\n", to_xenbus_device(dev)->devicetype); } -DEVICE_ATTR(devtype, S_IRUSR | S_IRGRP | S_IROTH, xendev_show_devtype, NULL); +static DEVICE_ATTR(devtype, S_IRUSR | S_IRGRP | S_IROTH, xendev_show_devtype, NULL); static ssize_t xendev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "xen:%s\n", to_xenbus_device(dev)->devicetype); } -DEVICE_ATTR(modalias, S_IRUSR | S_IRGRP | S_IROTH, xendev_show_modalias, NULL); +static DEVICE_ATTR(modalias, S_IRUSR | S_IRGRP | S_IROTH, xendev_show_modalias, NULL); int xenbus_probe_node(struct xen_bus_type *bus, const char *type, -- cgit v1.2.3 From c6e1971139be1342902873181f3b80a979bfb33b Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Wed, 8 Jul 2009 12:27:37 +0200 Subject: xen: fix is_disconnected_device/exists_disconnected_device The logic of is_disconnected_device/exists_disconnected_device is wrong in that they are used to test whether a device is trying to connect (i.e. connecting). For this reason the patch fixes them to not consider a Closing or Closed device to be connecting. At the same time the patch also renames the functions according to what they really do; you could say a closed device is "disconnected" (the old name), but not "connecting" (the new name). This patch is a backport of changeset 909 from the Xenbits tree. Cc: Jeremy Fitzhardinge Signed-off-by: Paolo Bonzini Signed-off-by: Jeremy Fitzhardinge --- drivers/xen/xenbus/xenbus_probe.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) (limited to 'drivers/xen') diff --git a/drivers/xen/xenbus/xenbus_probe.c b/drivers/xen/xenbus/xenbus_probe.c index 3800da7dabfe..19bce3e1b333 100644 --- a/drivers/xen/xenbus/xenbus_probe.c +++ b/drivers/xen/xenbus/xenbus_probe.c @@ -843,7 +843,7 @@ postcore_initcall(xenbus_probe_init); MODULE_LICENSE("GPL"); -static int is_disconnected_device(struct device *dev, void *data) +static int is_device_connecting(struct device *dev, void *data) { struct xenbus_device *xendev = to_xenbus_device(dev); struct device_driver *drv = data; @@ -861,14 +861,15 @@ static int is_disconnected_device(struct device *dev, void *data) return 0; xendrv = to_xenbus_driver(dev->driver); - return (xendev->state != XenbusStateConnected || - (xendrv->is_ready && !xendrv->is_ready(xendev))); + return (xendev->state < XenbusStateConnected || + (xendev->state == XenbusStateConnected && + xendrv->is_ready && !xendrv->is_ready(xendev))); } -static int exists_disconnected_device(struct device_driver *drv) +static int exists_connecting_device(struct device_driver *drv) { return bus_for_each_dev(&xenbus_frontend.bus, NULL, drv, - is_disconnected_device); + is_device_connecting); } static int print_device_status(struct device *dev, void *data) @@ -918,7 +919,7 @@ static void wait_for_devices(struct xenbus_driver *xendrv) if (!ready_to_wait_for_devices || !xen_domain()) return; - while (exists_disconnected_device(drv)) { + while (exists_connecting_device(drv)) { if (time_after(jiffies, timeout)) break; schedule_timeout_interruptible(HZ/10); -- cgit v1.2.3 From f8dc33088febc63286b7a60e6b678de8e064de8e Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Wed, 8 Jul 2009 12:27:38 +0200 Subject: xen: improvement to wait_for_devices() When printing a warning about a timed-out device, print the current state of both ends of the device connection (i.e., backend as well as frontend). This backports half of changeset 146 from the Xenbits tree. Cc: Jeremy Fitzhardinge Signed-off-by: Paolo Bonzini Signed-off-by: Jeremy Fitzhardinge --- drivers/xen/xenbus/xenbus_probe.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'drivers/xen') diff --git a/drivers/xen/xenbus/xenbus_probe.c b/drivers/xen/xenbus/xenbus_probe.c index 19bce3e1b333..9246a8c4ecf2 100644 --- a/drivers/xen/xenbus/xenbus_probe.c +++ b/drivers/xen/xenbus/xenbus_probe.c @@ -885,10 +885,13 @@ static int print_device_status(struct device *dev, void *data) /* Information only: is this too noisy? */ printk(KERN_INFO "XENBUS: Device with no driver: %s\n", xendev->nodename); - } else if (xendev->state != XenbusStateConnected) { + } else if (xendev->state < XenbusStateConnected) { + enum xenbus_state rstate = XenbusStateUnknown; + if (xendev->otherend) + rstate = xenbus_read_driver_state(xendev->otherend); printk(KERN_WARNING "XENBUS: Timeout connecting " - "to device: %s (state %d)\n", - xendev->nodename, xendev->state); + "to device: %s (local state %d, remote state %d)\n", + xendev->nodename, xendev->state, rstate); } return 0; -- cgit v1.2.3 From ae7888012969355a548372e99b066d9e31153b62 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Wed, 8 Jul 2009 12:27:39 +0200 Subject: xen: wait up to 5 minutes for device connetion Increases the device timeout from 10s to 5 minutes, giving the user a visual indication during that time in case there are problems. The patch is a backport of changesets 144 and 150 in the Xenbits tree. Cc: Jeremy Fitzhardinge Signed-off-by: Paolo Bonzini Signed-off-by: Jeremy Fitzhardinge --- drivers/xen/xenbus/xenbus_probe.c | 20 ++++++++++++++++---- 1 file changed, 16 insertions(+), 4 deletions(-) (limited to 'drivers/xen') diff --git a/drivers/xen/xenbus/xenbus_probe.c b/drivers/xen/xenbus/xenbus_probe.c index 9246a8c4ecf2..649fcdf114b7 100644 --- a/drivers/xen/xenbus/xenbus_probe.c +++ b/drivers/xen/xenbus/xenbus_probe.c @@ -901,7 +901,7 @@ static int print_device_status(struct device *dev, void *data) static int ready_to_wait_for_devices; /* - * On a 10 second timeout, wait for all devices currently configured. We need + * On a 5-minute timeout, wait for all devices currently configured. We need * to do this to guarantee that the filesystems and / or network devices * needed for boot are available, before we can allow the boot to proceed. * @@ -916,18 +916,30 @@ static int ready_to_wait_for_devices; */ static void wait_for_devices(struct xenbus_driver *xendrv) { - unsigned long timeout = jiffies + 10*HZ; + unsigned long start = jiffies; struct device_driver *drv = xendrv ? &xendrv->driver : NULL; + unsigned int seconds_waited = 0; if (!ready_to_wait_for_devices || !xen_domain()) return; while (exists_connecting_device(drv)) { - if (time_after(jiffies, timeout)) - break; + if (time_after(jiffies, start + (seconds_waited+5)*HZ)) { + if (!seconds_waited) + printk(KERN_WARNING "XENBUS: Waiting for " + "devices to initialise: "); + seconds_waited += 5; + printk("%us...", 300 - seconds_waited); + if (seconds_waited == 300) + break; + } + schedule_timeout_interruptible(HZ/10); } + if (seconds_waited) + printk("\n"); + bus_for_each_dev(&xenbus_frontend.bus, NULL, drv, print_device_status); } -- cgit v1.2.3 From 922cc38ab71d1360978e65207e4a4f4988987127 Mon Sep 17 00:00:00 2001 From: Jeremy Fitzhardinge Date: Tue, 24 Nov 2009 09:58:49 -0800 Subject: xen: don't call dpm_resume_noirq() with interrupts disabled. dpm_resume_noirq() takes a mutex, so it can't be called from a no-interrupt context. Don't call it from within the stop-machine function, but just afterwards, since we're resuming anyway, regardless of what happened. Signed-off-by: Jeremy Fitzhardinge Cc: Stable Kernel --- drivers/xen/manage.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) (limited to 'drivers/xen') diff --git a/drivers/xen/manage.c b/drivers/xen/manage.c index 10d03d7931c4..7b69a1aef877 100644 --- a/drivers/xen/manage.c +++ b/drivers/xen/manage.c @@ -43,7 +43,6 @@ static int xen_suspend(void *data) if (err) { printk(KERN_ERR "xen_suspend: sysdev_suspend failed: %d\n", err); - dpm_resume_noirq(PMSG_RESUME); return err; } @@ -69,7 +68,6 @@ static int xen_suspend(void *data) } sysdev_resume(); - dpm_resume_noirq(PMSG_RESUME); return 0; } @@ -108,6 +106,9 @@ static void do_suspend(void) } err = stop_machine(xen_suspend, &cancelled, cpumask_of(0)); + + dpm_resume_noirq(PMSG_RESUME); + if (err) { printk(KERN_ERR "failed to start xen_suspend: %d\n", err); goto out; @@ -119,8 +120,6 @@ static void do_suspend(void) } else xs_suspend_cancel(); - dpm_resume_noirq(PMSG_RESUME); - resume_devices: dpm_resume_end(PMSG_RESUME); -- cgit v1.2.3 From fed5ea87e02aaf902ff38c65b4514233db03dc09 Mon Sep 17 00:00:00 2001 From: Ian Campbell Date: Tue, 1 Dec 2009 16:15:30 +0000 Subject: xen: don't leak IRQs over suspend/resume. On resume irq_info[*].evtchn is reset to 0 since event channel mappings are not preserved over suspend/resume. The other contents of irq_info is preserved to allow rebind_evtchn_irq() to function. However when a device resumes it will try to unbind from the previous IRQ (e.g. blkfront goes blkfront_resume() -> blkif_free() -> unbind_from_irqhandler() -> unbind_from_irq()). This will fail due to the check for VALID_EVTCHN in unbind_from_irq() and the IRQ is leaked. The device will then continue to resume and allocate a new IRQ, eventually leading to find_unbound_irq() panic()ing. Fix this by changing unbind_from_irq() to handle teardown of interrupts which have type!=IRQT_UNBOUND but are not currently bound to a specific event channel. Signed-off-by: Ian Campbell Signed-off-by: Jeremy Fitzhardinge Cc: Stable Kernel --- drivers/xen/events.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/xen') diff --git a/drivers/xen/events.c b/drivers/xen/events.c index 2f57276e87a2..ce602dd09bc1 100644 --- a/drivers/xen/events.c +++ b/drivers/xen/events.c @@ -474,6 +474,9 @@ static void unbind_from_irq(unsigned int irq) bind_evtchn_to_cpu(evtchn, 0); evtchn_to_irq[evtchn] = -1; + } + + if (irq_info[irq].type != IRQT_UNBOUND) { irq_info[irq] = mk_unbound_info(); dynamic_irq_cleanup(irq); -- cgit v1.2.3 From 65f63384b391bf4d384327d8a7c6de9860290b5c Mon Sep 17 00:00:00 2001 From: Ian Campbell Date: Tue, 1 Dec 2009 11:47:14 +0000 Subject: xen: improve error handling in do_suspend. The existing error handling has a few issues: - If freeze_processes() fails it exits with shutting_down = SHUTDOWN_SUSPEND. - If dpm_suspend_noirq() fails it exits without resuming xenbus. - If stop_machine() fails it exits without resuming xenbus or calling dpm_resume_end(). - xs_suspend()/xs_resume() and dpm_suspend_noirq()/dpm_resume_noirq() were not nested in the obvious way. Fix by ensuring each failure case goto's the correct label. Treat a failure of stop_machine() as a cancelled suspend in order to follow the correct resume path. Signed-off-by: Ian Campbell Signed-off-by: Jeremy Fitzhardinge Cc: Stable Kernel --- drivers/xen/manage.c | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-) (limited to 'drivers/xen') diff --git a/drivers/xen/manage.c b/drivers/xen/manage.c index 7b69a1aef877..2fb7d39b814c 100644 --- a/drivers/xen/manage.c +++ b/drivers/xen/manage.c @@ -86,32 +86,32 @@ static void do_suspend(void) err = freeze_processes(); if (err) { printk(KERN_ERR "xen suspend: freeze failed %d\n", err); - return; + goto out; } #endif err = dpm_suspend_start(PMSG_SUSPEND); if (err) { printk(KERN_ERR "xen suspend: dpm_suspend_start %d\n", err); - goto out; + goto out_thaw; } - printk(KERN_DEBUG "suspending xenstore...\n"); - xs_suspend(); - err = dpm_suspend_noirq(PMSG_SUSPEND); if (err) { printk(KERN_ERR "dpm_suspend_noirq failed: %d\n", err); - goto resume_devices; + goto out_resume; } + printk(KERN_DEBUG "suspending xenstore...\n"); + xs_suspend(); + err = stop_machine(xen_suspend, &cancelled, cpumask_of(0)); dpm_resume_noirq(PMSG_RESUME); if (err) { printk(KERN_ERR "failed to start xen_suspend: %d\n", err); - goto out; + cancelled = 1; } if (!cancelled) { @@ -120,15 +120,17 @@ static void do_suspend(void) } else xs_suspend_cancel(); -resume_devices: +out_resume: dpm_resume_end(PMSG_RESUME); /* Make sure timer events get retriggered on all CPUs */ clock_was_set(); -out: + +out_thaw: #ifdef CONFIG_PREEMPT thaw_processes(); #endif +out: shutting_down = SHUTDOWN_INVALID; } #endif /* CONFIG_PM_SLEEP */ -- cgit v1.2.3 From b4606f2165153833247823e8c04c5e88cb3d298b Mon Sep 17 00:00:00 2001 From: Ian Campbell Date: Tue, 1 Dec 2009 11:47:15 +0000 Subject: xen: explicitly create/destroy stop_machine workqueues outside suspend/resume region. I have observed cases where the implicit stop_machine_destroy() done by stop_machine() hangs while destroying the workqueues, specifically in kthread_stop(). This seems to be because timer ticks are not restarted until after stop_machine() returns. Fortunately stop_machine provides a facility to pre-create/post-destroy the workqueues so use this to ensure that workqueues are only destroyed after everything is really up and running again. I only actually observed this failure with 2.6.30. It seems that newer kernels are somehow more robust against doing kthread_stop() without timer interrupts (I tried some backports of some likely looking candidates but did not track down the commit which added this robustness). However this change seems like a reasonable belt&braces thing to do. Signed-off-by: Ian Campbell Signed-off-by: Jeremy Fitzhardinge Cc: Stable Kernel --- drivers/xen/manage.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) (limited to 'drivers/xen') diff --git a/drivers/xen/manage.c b/drivers/xen/manage.c index 2fb7d39b814c..c4997930afc7 100644 --- a/drivers/xen/manage.c +++ b/drivers/xen/manage.c @@ -79,6 +79,12 @@ static void do_suspend(void) shutting_down = SHUTDOWN_SUSPEND; + err = stop_machine_create(); + if (err) { + printk(KERN_ERR "xen suspend: failed to setup stop_machine %d\n", err); + goto out; + } + #ifdef CONFIG_PREEMPT /* If the kernel is preemptible, we need to freeze all the processes to prevent them from being in the middle of a pagetable update @@ -86,7 +92,7 @@ static void do_suspend(void) err = freeze_processes(); if (err) { printk(KERN_ERR "xen suspend: freeze failed %d\n", err); - goto out; + goto out_destroy_sm; } #endif @@ -129,7 +135,11 @@ out_resume: out_thaw: #ifdef CONFIG_PREEMPT thaw_processes(); + +out_destroy_sm: #endif + stop_machine_destroy(); + out: shutting_down = SHUTDOWN_INVALID; } -- cgit v1.2.3 From 3d65c9488cadd2f11bd4d60c7266e639ece5d0d6 Mon Sep 17 00:00:00 2001 From: Gianluca Guida Date: Thu, 30 Jul 2009 22:54:36 +0100 Subject: Xen balloon: fix totalram_pages counting. Change totalram_pages when a single page is added/removed to the ballooned list. This avoid totalram_pages to be set erroneously to max_pfn at boot. Signed-off-by: Gianluca Guida Signed-off-by: Jeremy Fitzhardinge Cc: Stable Kernel --- drivers/xen/balloon.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'drivers/xen') diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c index d31505b6f7a4..6eb62654410a 100644 --- a/drivers/xen/balloon.c +++ b/drivers/xen/balloon.c @@ -136,6 +136,8 @@ static void balloon_append(struct page *page) list_add(&page->lru, &ballooned_pages); balloon_stats.balloon_low++; } + + totalram_pages--; } /* balloon_retrieve: rescue a page from the balloon, if it is not empty. */ @@ -156,6 +158,8 @@ static struct page *balloon_retrieve(void) else balloon_stats.balloon_low--; + totalram_pages++; + return page; } @@ -260,7 +264,6 @@ static int increase_reservation(unsigned long nr_pages) } balloon_stats.current_pages += nr_pages; - totalram_pages = balloon_stats.current_pages; out: spin_unlock_irqrestore(&balloon_lock, flags); @@ -323,7 +326,6 @@ static int decrease_reservation(unsigned long nr_pages) BUG_ON(ret != nr_pages); balloon_stats.current_pages -= nr_pages; - totalram_pages = balloon_stats.current_pages; spin_unlock_irqrestore(&balloon_lock, flags); @@ -422,7 +424,6 @@ static int __init balloon_init(void) pr_info("xen_balloon: Initialising balloon driver.\n"); balloon_stats.current_pages = min(xen_start_info->nr_pages, max_pfn); - totalram_pages = balloon_stats.current_pages; balloon_stats.target_pages = balloon_stats.current_pages; balloon_stats.balloon_low = 0; balloon_stats.balloon_high = 0; -- cgit v1.2.3 From bc2c0303226ec716854d3c208c7f84fe7aa35cd7 Mon Sep 17 00:00:00 2001 From: Ian Campbell Date: Fri, 5 Jun 2009 11:58:37 +0100 Subject: xen: try harder to balloon up under memory pressure. Currently if the balloon driver is unable to increase the guest's reservation it assumes the failure was due to reaching its full allocation, gives up on the ballooning operation and records the limit it reached as the "hard limit". The driver will not try again until the target is set again (even to the same value). However it is possible that ballooning has in fact failed due to memory pressure in the host and therefore it is desirable to keep attempting to reach the target in case memory becomes available. The most likely scenario is that some guests are ballooning down while others are ballooning up and therefore there is temporary memory pressure while things stabilise. You would not expect a well behaved toolstack to ask a domain to balloon to more than its allocation nor would you expect it to deliberately over-commit memory by setting balloon targets which exceed the total host memory. This patch drops the concept of a hard limit and causes the balloon driver to retry increasing the reservation on a timer in the same manner as when decreasing the reservation. Also if we partially succeed in increasing the reservation (i.e. receive less pages than we asked for) then we may as well keep those pages rather than returning them to Xen. Signed-off-by: Ian Campbell Cc: Stable Kernel --- drivers/xen/balloon.c | 31 +++++-------------------------- 1 file changed, 5 insertions(+), 26 deletions(-) (limited to 'drivers/xen') diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c index 6eb62654410a..420433613584 100644 --- a/drivers/xen/balloon.c +++ b/drivers/xen/balloon.c @@ -66,8 +66,6 @@ struct balloon_stats { /* We aim for 'current allocation' == 'target allocation'. */ unsigned long current_pages; unsigned long target_pages; - /* We may hit the hard limit in Xen. If we do then we remember it. */ - unsigned long hard_limit; /* * Drivers may alter the memory reservation independently, but they * must inform the balloon driver so we avoid hitting the hard limit. @@ -185,7 +183,7 @@ static void balloon_alarm(unsigned long unused) static unsigned long current_target(void) { - unsigned long target = min(balloon_stats.target_pages, balloon_stats.hard_limit); + unsigned long target = balloon_stats.target_pages; target = min(target, balloon_stats.current_pages + @@ -221,23 +219,10 @@ static int increase_reservation(unsigned long nr_pages) set_xen_guest_handle(reservation.extent_start, frame_list); reservation.nr_extents = nr_pages; rc = HYPERVISOR_memory_op(XENMEM_populate_physmap, &reservation); - if (rc < nr_pages) { - if (rc > 0) { - int ret; - - /* We hit the Xen hard limit: reprobe. */ - reservation.nr_extents = rc; - ret = HYPERVISOR_memory_op(XENMEM_decrease_reservation, - &reservation); - BUG_ON(ret != rc); - } - if (rc >= 0) - balloon_stats.hard_limit = (balloon_stats.current_pages + rc - - balloon_stats.driver_pages); + if (rc < 0) goto out; - } - for (i = 0; i < nr_pages; i++) { + for (i = 0; i < rc; i++) { page = balloon_retrieve(); BUG_ON(page == NULL); @@ -263,12 +248,12 @@ static int increase_reservation(unsigned long nr_pages) __free_page(page); } - balloon_stats.current_pages += nr_pages; + balloon_stats.current_pages += rc; out: spin_unlock_irqrestore(&balloon_lock, flags); - return 0; + return rc < 0 ? rc : rc != nr_pages; } static int decrease_reservation(unsigned long nr_pages) @@ -369,7 +354,6 @@ static void balloon_process(struct work_struct *work) static void balloon_set_new_target(unsigned long target) { /* No need for lock. Not read-modify-write updates. */ - balloon_stats.hard_limit = ~0UL; balloon_stats.target_pages = target; schedule_work(&balloon_worker); } @@ -428,7 +412,6 @@ static int __init balloon_init(void) balloon_stats.balloon_low = 0; balloon_stats.balloon_high = 0; balloon_stats.driver_pages = 0UL; - balloon_stats.hard_limit = ~0UL; init_timer(&balloon_timer); balloon_timer.data = 0; @@ -473,9 +456,6 @@ module_exit(balloon_exit); BALLOON_SHOW(current_kb, "%lu\n", PAGES2KB(balloon_stats.current_pages)); BALLOON_SHOW(low_kb, "%lu\n", PAGES2KB(balloon_stats.balloon_low)); BALLOON_SHOW(high_kb, "%lu\n", PAGES2KB(balloon_stats.balloon_high)); -BALLOON_SHOW(hard_limit_kb, - (balloon_stats.hard_limit!=~0UL) ? "%lu\n" : "???\n", - (balloon_stats.hard_limit!=~0UL) ? PAGES2KB(balloon_stats.hard_limit) : 0); BALLOON_SHOW(driver_kb, "%lu\n", PAGES2KB(balloon_stats.driver_pages)); static ssize_t show_target_kb(struct sys_device *dev, struct sysdev_attribute *attr, @@ -545,7 +525,6 @@ static struct attribute *balloon_info_attrs[] = { &attr_current_kb.attr, &attr_low_kb.attr, &attr_high_kb.attr, - &attr_hard_limit_kb.attr, &attr_driver_kb.attr, NULL }; -- cgit v1.2.3