rpms/kernel/devel linux-2.6-acpi-keep-tsc-stable-when-lapic-timer-c2-ok-is-set.patch, NONE, 1.1 linux-2.6-clockevents-fix-resume-logic.patch, NONE, 1.1 linux-2.6-clocksource-fix-resume-logic.patch, NONE, 1.1 linux-2.6-highres-dyntick-avoid-xtime-lock-contention.patch, NONE, 1.1 linux-2.6-timer-tick-broadcast.patch, NONE, 1.1 kernel-2.6.spec, 1.3125, 1.3126
Dave Jones (davej)
fedora-extras-commits at redhat.com
Thu May 3 18:55:38 UTC 2007
Author: davej
Update of /cvs/pkgs/rpms/kernel/devel
In directory cvs-int.fedora.redhat.com:/tmp/cvs-serv3485
Modified Files:
kernel-2.6.spec
Added Files:
linux-2.6-acpi-keep-tsc-stable-when-lapic-timer-c2-ok-is-set.patch
linux-2.6-clockevents-fix-resume-logic.patch
linux-2.6-clocksource-fix-resume-logic.patch
linux-2.6-highres-dyntick-avoid-xtime-lock-contention.patch
linux-2.6-timer-tick-broadcast.patch
Log Message:
* Wed May 2 2007 Dave Jones <davej at redhat.com>
- Assorted dyntick/clock/timer fixes.
linux-2.6-acpi-keep-tsc-stable-when-lapic-timer-c2-ok-is-set.patch:
--- NEW FILE linux-2.6-acpi-keep-tsc-stable-when-lapic-timer-c2-ok-is-set.patch ---
Subject: ACPI: Keep TSC stable, when lapic_timer_c2_ok is set
The local apic timer stop in C2 resp. C3 states is coupled with the
stop of the TSC. When the local apic timer is marked stable in C2
on the kernel commandline, then keep the TSC marked stable in C2 as well.
Signed-off-by: Thomas Gleixner <tglx at linutronix.de>
---
drivers/acpi/processor_idle.c | 19 ++++++++-----------
1 file changed, 8 insertions(+), 11 deletions(-)
Index: linux-2.6.21/drivers/acpi/processor_idle.c
===================================================================
--- linux-2.6.21.orig/drivers/acpi/processor_idle.c
+++ linux-2.6.21/drivers/acpi/processor_idle.c
@@ -305,18 +305,23 @@ static void acpi_state_timer_broadcast(s
struct acpi_processor_cx *cx,
int broadcast)
{
-#ifdef CONFIG_GENERIC_CLOCKEVENTS
-
int state = cx - pr->power.states;
if (state >= pr->power.timer_broadcast_on_state) {
+
+#ifdef CONFIG_GENERIC_CLOCKEVENTS
unsigned long reason;
reason = broadcast ? CLOCK_EVT_NOTIFY_BROADCAST_ENTER :
CLOCK_EVT_NOTIFY_BROADCAST_EXIT;
clockevents_notify(reason, &pr->id);
- }
#endif
+
+#ifdef CONFIG_GENERIC_TIME
+ /* TSC halts in C2/3, so notify users */
+ mark_tsc_unstable();
+#endif
+ }
}
#else
@@ -481,10 +486,6 @@ static void acpi_processor_idle(void)
/* Get end time (ticks) */
t2 = inl(acpi_gbl_FADT.xpm_timer_block.address);
-#ifdef CONFIG_GENERIC_TIME
- /* TSC halts in C2, so notify users */
- mark_tsc_unstable();
-#endif
/* Re-enable interrupts */
local_irq_enable();
current_thread_info()->status |= TS_POLLING;
@@ -523,10 +524,6 @@ static void acpi_processor_idle(void)
acpi_set_register(ACPI_BITREG_ARB_DISABLE, 0);
}
-#ifdef CONFIG_GENERIC_TIME
- /* TSC halts in C3, so notify users */
- mark_tsc_unstable();
-#endif
/* Re-enable interrupts */
local_irq_enable();
current_thread_info()->status |= TS_POLLING;
linux-2.6-clockevents-fix-resume-logic.patch:
--- NEW FILE linux-2.6-clockevents-fix-resume-logic.patch ---
Subject: clockevents: Fix resume logic
We need to make sure, that the clockevent devices are resumed, before
the tick is resumed. The current resume logic does not guarantee this.
Add CLOCK_EVT_MODE_RESUME and call the set mode functions of the clock
event devices before resuming the tick / oneshot functionality.
Fixup the existing users.
Signed-off-by: Thomas Gleixner <tglx at linutronix.de>
---
arch/i386/kernel/apic.c | 3 +
arch/i386/kernel/hpet.c | 71 +++----------------------------------------
arch/i386/kernel/i8253.c | 4 ++
include/linux/clockchips.h | 1
kernel/time/tick-broadcast.c | 2 +
kernel/time/tick-common.c | 16 ++++++---
6 files changed, 25 insertions(+), 72 deletions(-)
Index: linux-2.6.21/arch/i386/kernel/apic.c
===================================================================
--- linux-2.6.21.orig/arch/i386/kernel/apic.c
+++ linux-2.6.21/arch/i386/kernel/apic.c
@@ -242,6 +242,9 @@ static void lapic_timer_setup(enum clock
v |= (APIC_LVT_MASKED | LOCAL_TIMER_VECTOR);
apic_write_around(APIC_LVTT, v);
break;
+ case CLOCK_EVT_MODE_RESUME:
+ /* Nothing to do here */
+ break;
}
local_irq_restore(flags);
Index: linux-2.6.21/arch/i386/kernel/hpet.c
===================================================================
--- linux-2.6.21.orig/arch/i386/kernel/hpet.c
+++ linux-2.6.21/arch/i386/kernel/hpet.c
@@ -187,6 +187,10 @@ static void hpet_set_mode(enum clock_eve
cfg &= ~HPET_TN_ENABLE;
hpet_writel(cfg, HPET_T0_CFG);
break;
+
+ case CLOCK_EVT_MODE_RESUME:
+ hpet_enable_int();
+ break;
}
}
@@ -217,6 +221,7 @@ static struct clocksource clocksource_hp
.mask = HPET_MASK,
.shift = HPET_SHIFT,
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
+ .resume = hpet_start_counter,
};
/*
@@ -291,7 +296,6 @@ int __init hpet_enable(void)
clocksource_register(&clocksource_hpet);
-
if (id & HPET_ID_LEGSUP) {
hpet_enable_int();
hpet_reserve_platform_timers(id);
@@ -524,68 +528,3 @@ irqreturn_t hpet_rtc_interrupt(int irq,
return IRQ_HANDLED;
}
#endif
-
-
-/*
- * Suspend/resume part
- */
-
-#ifdef CONFIG_PM
-
-static int hpet_suspend(struct sys_device *sys_device, pm_message_t state)
-{
- unsigned long cfg = hpet_readl(HPET_CFG);
-
- cfg &= ~(HPET_CFG_ENABLE|HPET_CFG_LEGACY);
- hpet_writel(cfg, HPET_CFG);
-
- return 0;
-}
-
-static int hpet_resume(struct sys_device *sys_device)
-{
- unsigned int id;
-
- hpet_start_counter();
-
- id = hpet_readl(HPET_ID);
-
- if (id & HPET_ID_LEGSUP)
- hpet_enable_int();
-
- return 0;
-}
-
-static struct sysdev_class hpet_class = {
- set_kset_name("hpet"),
- .suspend = hpet_suspend,
- .resume = hpet_resume,
-};
-
-static struct sys_device hpet_device = {
- .id = 0,
- .cls = &hpet_class,
-};
-
-
-static __init int hpet_register_sysfs(void)
-{
- int err;
-
- if (!is_hpet_capable())
- return 0;
-
- err = sysdev_class_register(&hpet_class);
-
- if (!err) {
- err = sysdev_register(&hpet_device);
- if (err)
- sysdev_class_unregister(&hpet_class);
- }
-
- return err;
-}
-
-device_initcall(hpet_register_sysfs);
-
-#endif
Index: linux-2.6.21/arch/i386/kernel/i8253.c
===================================================================
--- linux-2.6.21.orig/arch/i386/kernel/i8253.c
+++ linux-2.6.21/arch/i386/kernel/i8253.c
@@ -62,6 +62,10 @@ static void init_pit_timer(enum clock_ev
outb_p(0x38, PIT_MODE);
udelay(10);
break;
+
+ case CLOCK_EVT_MODE_RESUME:
+ /* Nothing to do here */
+ break;
}
spin_unlock_irqrestore(&i8253_lock, flags);
}
Index: linux-2.6.21/include/linux/clockchips.h
===================================================================
--- linux-2.6.21.orig/include/linux/clockchips.h
+++ linux-2.6.21/include/linux/clockchips.h
@@ -23,6 +23,7 @@ enum clock_event_mode {
CLOCK_EVT_MODE_SHUTDOWN,
CLOCK_EVT_MODE_PERIODIC,
CLOCK_EVT_MODE_ONESHOT,
+ CLOCK_EVT_MODE_RESUME,
};
/* Clock event notification values */
Index: linux-2.6.21/kernel/time/tick-broadcast.c
===================================================================
--- linux-2.6.21.orig/kernel/time/tick-broadcast.c
+++ linux-2.6.21/kernel/time/tick-broadcast.c
@@ -309,6 +309,8 @@ int tick_resume_broadcast(void)
bc = tick_broadcast_device.evtdev;
if (bc) {
+ clockevents_set_mode(bc, CLOCK_EVT_MODE_RESUME);
+
switch (tick_broadcast_device.mode) {
case TICKDEV_MODE_PERIODIC:
if(!cpus_empty(tick_broadcast_mask))
Index: linux-2.6.21/kernel/time/tick-common.c
===================================================================
--- linux-2.6.21.orig/kernel/time/tick-common.c
+++ linux-2.6.21/kernel/time/tick-common.c
@@ -318,12 +318,17 @@ static void tick_resume(void)
{
struct tick_device *td = &__get_cpu_var(tick_cpu_device);
unsigned long flags;
+ int broadcast = tick_resume_broadcast();
spin_lock_irqsave(&tick_device_lock, flags);
- if (td->mode == TICKDEV_MODE_PERIODIC)
- tick_setup_periodic(td->evtdev, 0);
- else
- tick_resume_oneshot();
+ clockevents_set_mode(td->evtdev, CLOCK_EVT_MODE_RESUME);
+
+ if (!broadcast) {
+ if (td->mode == TICKDEV_MODE_PERIODIC)
+ tick_setup_periodic(td->evtdev, 0);
+ else
+ tick_resume_oneshot();
+ }
spin_unlock_irqrestore(&tick_device_lock, flags);
}
@@ -360,8 +365,7 @@ static int tick_notify(struct notifier_b
break;
case CLOCK_EVT_NOTIFY_RESUME:
- if (!tick_resume_broadcast())
- tick_resume();
+ tick_resume();
break;
default:
linux-2.6-clocksource-fix-resume-logic.patch:
--- NEW FILE linux-2.6-clocksource-fix-resume-logic.patch ---
Subject: clocksource: Fix resume logic
We need to make sure, that the clocksources are resumed, when timekeeping
is resumed. The current resume logic does not guarantee this.
Add a resume function pointer to the clocksource struct, so clocksource
drivers which need to reinitialize the clocksource can provide a resume
function.
Add a resume function, which calls the maybe available clocksource resume
functions and resets the watchdog function, so a stable TSC can be used
accross suspend/resume.
Signed-off-by: Thomas Gleixner <tglx at linutronix.de>
---
include/linux/clocksource.h | 3 ++
kernel/time/clocksource.c | 45 ++++++++++++++++++++++++++++++++++++++++++++
kernel/timer.c | 2 +
3 files changed, 50 insertions(+)
Index: linux-2.6.21/include/linux/clocksource.h
===================================================================
--- linux-2.6.21.orig/include/linux/clocksource.h
+++ linux-2.6.21/include/linux/clocksource.h
@@ -48,6 +48,7 @@ struct clocksource;
* @shift: cycle to nanosecond divisor (power of two)
* @flags: flags describing special properties
* @vread: vsyscall based read
+ * @resume: resume function for the clocksource, if necessary
* @cycle_interval: Used internally by timekeeping core, please ignore.
* @xtime_interval: Used internally by timekeeping core, please ignore.
*/
@@ -61,6 +62,7 @@ struct clocksource {
u32 shift;
unsigned long flags;
cycle_t (*vread)(void);
+ void (*resume)(void);
/* timekeeping specific data, ignore */
cycle_t cycle_last, cycle_interval;
@@ -198,6 +200,7 @@ static inline void clocksource_calculate
extern int clocksource_register(struct clocksource*);
extern struct clocksource* clocksource_get_next(void);
extern void clocksource_change_rating(struct clocksource *cs, int rating);
+extern void clocksource_resume(void);
#ifdef CONFIG_GENERIC_TIME_VSYSCALL
extern void update_vsyscall(struct timespec *ts, struct clocksource *c);
Index: linux-2.6.21/kernel/time/clocksource.c
===================================================================
--- linux-2.6.21.orig/kernel/time/clocksource.c
+++ linux-2.6.21/kernel/time/clocksource.c
@@ -74,6 +74,8 @@ static struct clocksource *watchdog;
static struct timer_list watchdog_timer;
static DEFINE_SPINLOCK(watchdog_lock);
static cycle_t watchdog_last;
+static int watchdog_resumed;
+
/*
* Interval: 0.5sec Treshold: 0.0625s
*/
@@ -98,15 +100,26 @@ static void clocksource_watchdog(unsigne
struct clocksource *cs, *tmp;
cycle_t csnow, wdnow;
int64_t wd_nsec, cs_nsec;
+ int resumed;
spin_lock(&watchdog_lock);
+ resumed = watchdog_resumed;
+ if (unlikely(resumed))
+ watchdog_resumed = 0;
+
wdnow = watchdog->read();
wd_nsec = cyc2ns(watchdog, (wdnow - watchdog_last) & watchdog->mask);
watchdog_last = wdnow;
list_for_each_entry_safe(cs, tmp, &watchdog_list, wd_list) {
csnow = cs->read();
+
+ if (unlikely(resumed)) {
+ cs->wd_last = csnow;
+ continue;
+ }
+
/* Initialized ? */
if (!(cs->flags & CLOCK_SOURCE_WATCHDOG)) {
if ((cs->flags & CLOCK_SOURCE_IS_CONTINUOUS) &&
@@ -136,6 +149,13 @@ static void clocksource_watchdog(unsigne
}
spin_unlock(&watchdog_lock);
}
+static void clocksource_resume_watchdog(void)
+{
+ spin_lock(&watchdog_lock);
+ watchdog_resumed = 1;
+ spin_unlock(&watchdog_lock);
+}
+
static void clocksource_check_watchdog(struct clocksource *cs)
{
struct clocksource *cse;
@@ -182,9 +202,34 @@ static void clocksource_check_watchdog(s
if (cs->flags & CLOCK_SOURCE_IS_CONTINUOUS)
cs->flags |= CLOCK_SOURCE_VALID_FOR_HRES;
}
+
+static inline void clocksource_resume_watchdog(void) { }
#endif
/**
+ * clocksource_resume - resume the clocksource(s)
+ */
+void clocksource_resume(void)
+{
+ struct list_head *tmp;
+ unsigned long flags;
+
+ spin_lock_irqsave(&clocksource_lock, flags);
+
+ list_for_each(tmp, &clocksource_list) {
+ struct clocksource *cs;
+
+ cs = list_entry(tmp, struct clocksource, list);
+ if (cs->resume)
+ cs->resume();
+ }
+
+ clocksource_resume_watchdog();
+
+ spin_unlock_irqrestore(&clocksource_lock, flags);
+}
+
+/**
* clocksource_get_next - Returns the selected clocksource
*
*/
Index: linux-2.6.21/kernel/timer.c
===================================================================
--- linux-2.6.21.orig/kernel/timer.c
+++ linux-2.6.21/kernel/timer.c
@@ -997,6 +997,8 @@ static int timekeeping_resume(struct sys
unsigned long flags;
unsigned long now = read_persistent_clock();
+ clocksource_resume();
+
write_seqlock_irqsave(&xtime_lock, flags);
if (now && (now > timekeeping_suspend_time)) {
linux-2.6-highres-dyntick-avoid-xtime-lock-contention.patch:
--- NEW FILE linux-2.6-highres-dyntick-avoid-xtime-lock-contention.patch ---
---
kernel/time/tick-common.c | 8 +++++++-
kernel/time/tick-internal.h | 1 +
kernel/time/tick-sched.c | 42 ++++++++++++++++++++++++++++++++++++++++--
3 files changed, 48 insertions(+), 3 deletions(-)
Index: linux-2.6.21/kernel/time/tick-common.c
===================================================================
--- linux-2.6.21.orig/kernel/time/tick-common.c
+++ linux-2.6.21/kernel/time/tick-common.c
@@ -31,7 +31,7 @@ DEFINE_PER_CPU(struct tick_device, tick_
*/
ktime_t tick_next_period;
ktime_t tick_period;
-static int tick_do_timer_cpu = -1;
+int tick_do_timer_cpu __read_mostly = -1;
DEFINE_SPINLOCK(tick_device_lock);
/*
@@ -295,6 +295,12 @@ static void tick_shutdown(unsigned int *
clockevents_exchange_device(dev, NULL);
td->evtdev = NULL;
}
+ /* Transfer the do_timer job away from this cpu */
+ if (*cpup == tick_do_timer_cpu) {
+ int cpu = first_cpu(cpu_online_map);
+
+ tick_do_timer_cpu = (cpu != NR_CPUS) ? cpu : -1;
+ }
spin_unlock_irqrestore(&tick_device_lock, flags);
}
Index: linux-2.6.21/kernel/time/tick-internal.h
===================================================================
--- linux-2.6.21.orig/kernel/time/tick-internal.h
+++ linux-2.6.21/kernel/time/tick-internal.h
@@ -5,6 +5,7 @@ DECLARE_PER_CPU(struct tick_device, tick
extern spinlock_t tick_device_lock;
extern ktime_t tick_next_period;
extern ktime_t tick_period;
+extern int tick_do_timer_cpu;
extern void tick_setup_periodic(struct clock_event_device *dev, int broadcast);
extern void tick_handle_periodic(struct clock_event_device *dev);
Index: linux-2.6.21/kernel/time/tick-sched.c
===================================================================
--- linux-2.6.21.orig/kernel/time/tick-sched.c
+++ linux-2.6.21/kernel/time/tick-sched.c
@@ -221,6 +221,18 @@ void tick_nohz_stop_sched_tick(void)
ts->tick_stopped = 1;
ts->idle_jiffies = last_jiffies;
}
+
+ /*
+ * If this cpu is the one which updates jiffies, then
+ * give up the assignment and let it be taken by the
+ * cpu which runs the tick timer next, which might be
+ * this cpu as well. If we don't drop this here the
+ * jiffies might be stale and do_timer() never
+ * invoked.
+ */
+ if (cpu == tick_do_timer_cpu)
+ tick_do_timer_cpu = -1;
+
/*
* calculate the expiry time for the next timer wheel
* timer
@@ -338,12 +350,24 @@ static void tick_nohz_handler(struct clo
{
struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched);
struct pt_regs *regs = get_irq_regs();
+ int cpu = smp_processor_id();
ktime_t now = ktime_get();
dev->next_event.tv64 = KTIME_MAX;
+ /*
+ * Check if the do_timer duty was dropped. We don't care about
+ * concurrency: This happens only when the cpu in charge went
+ * into a long sleep. If two cpus happen to assign themself to
+ * this duty, then the jiffies update is still serialized by
+ * xtime_lock.
+ */
+ if (unlikely(tick_do_timer_cpu == -1))
+ tick_do_timer_cpu = cpu;
+
/* Check, if the jiffies need an update */
- tick_do_update_jiffies64(now);
+ if (tick_do_timer_cpu == cpu)
+ tick_do_update_jiffies64(now);
/*
* When we are idle and the tick is stopped, we have to touch
@@ -431,9 +455,23 @@ static enum hrtimer_restart tick_sched_t
struct hrtimer_cpu_base *base = timer->base->cpu_base;
struct pt_regs *regs = get_irq_regs();
ktime_t now = ktime_get();
+ int cpu = smp_processor_id();
+
+#ifdef CONFIG_NO_HZ
+ /*
+ * Check if the do_timer duty was dropped. We don't care about
+ * concurrency: This happens only when the cpu in charge went
+ * into a long sleep. If two cpus happen to assign themself to
+ * this duty, then the jiffies update is still serialized by
+ * xtime_lock.
+ */
+ if (unlikely(tick_do_timer_cpu == -1))
+ tick_do_timer_cpu = cpu;
+#endif
/* Check, if the jiffies need an update */
- tick_do_update_jiffies64(now);
+ if (tick_do_timer_cpu == cpu)
+ tick_do_update_jiffies64(now);
/*
* Do not call, when we are not in irq context and have
linux-2.6-timer-tick-broadcast.patch:
--- NEW FILE linux-2.6-timer-tick-broadcast.patch ---
>From davej Wed May 2 17:30:09 2007
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Subject: Re: timer updates
From: Thomas Gleixner <tglx at linutronix.de>
Reply-To: tglx at linutronix.de
To: Dave Jones <davej at redhat.com>
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References: <1178123543.25504.20.camel at localhost.localdomain>
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Date: Wed, 02 May 2007 23:31:49 +0200
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On Wed, 2007-05-02 at 18:32 +0200, Thomas Gleixner wrote:
> I guess all of those might be -stable material.
Can you please add this one ?
tglx
Index: linux-2.6.21/kernel/time/tick-broadcast.c
===================================================================
--- linux-2.6.21.orig/kernel/time/tick-broadcast.c
+++ linux-2.6.21/kernel/time/tick-broadcast.c
@@ -292,7 +292,7 @@ void tick_suspend_broadcast(void)
spin_lock_irqsave(&tick_broadcast_lock, flags);
bc = tick_broadcast_device.evtdev;
- if (bc && tick_broadcast_device.mode == TICKDEV_MODE_PERIODIC)
+ if (bc)
clockevents_set_mode(bc, CLOCK_EVT_MODE_SHUTDOWN);
spin_unlock_irqrestore(&tick_broadcast_lock, flags);
Index: kernel-2.6.spec
===================================================================
RCS file: /cvs/pkgs/rpms/kernel/devel/kernel-2.6.spec,v
retrieving revision 1.3125
retrieving revision 1.3126
diff -u -r1.3125 -r1.3126
--- kernel-2.6.spec 1 May 2007 21:53:26 -0000 1.3125
+++ kernel-2.6.spec 3 May 2007 18:54:51 -0000 1.3126
@@ -603,6 +603,13 @@
Patch2303: git-iwlwifi-fixes.patch
Patch2304: linux-2.6-zd1211rw-mac80211-queue-limit.patch
+# Assorted dyntick/clock/timer fixes.
+Patch2400: linux-2.6-highres-dyntick-avoid-xtime-lock-contention.patch
+Patch2401: linux-2.6-clocksource-fix-resume-logic.patch
+Patch2402: linux-2.6-acpi-keep-tsc-stable-when-lapic-timer-c2-ok-is-set.patch
+Patch2403: linux-2.6-clockevents-fix-resume-logic.patch
+Patch2404: linux-2.6-timer-tick-broadcast.patch
+
# ACPI bits
# Add the new firewire stack. Diff between the v2.6.20 tag and commit
@@ -1352,6 +1359,13 @@
# limite queueing of URBs to zd1211rw-mac80211 driver
%patch2304 -p1
+# Assorted dyntick/clock/timer fixes.
+%patch2400 -p1
+%patch2401 -p1
+%patch2402 -p1
+%patch2403 -p1
+%patch2404 -p1
+
# ACPI patches
#
@@ -2340,6 +2354,9 @@
# - tux.
%changelog
+* Wed May 2 2007 Dave Jones <davej at redhat.com>
+- Assorted dyntick/clock/timer fixes.
+
* Tue May 01 2007 Dave Jones <davej at redhat.com>
- Update sparse to 0.3 and reenable.
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