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Date: Mon, 14 Jul 2008 18:28:21 +0200 (CEST)
From: Thomas Gleixner <tglx@...utronix.de>
To: Linus Torvalds <torvalds@...ux-foundation.org>
cc: LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>
Subject: [GIT pull] timer updates for 2.6.27
Linus,
Please pull the latest timers/for-linus git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git timers/for-linus
Thanks,
tglx
------------------>
Carlos R. Mafra (1):
hrtimer: Remove unused variables in ktime_divns()
Heiko Carstens (1):
nohz: don't stop idle tick if softirqs are pending.
Hiroshi Shimamoto (1):
posix-timers: print RT watchdog message
Ingo Molnar (1):
nohz: reduce jiffies polling overhead
Jeremy Fitzhardinge (1):
hrtimer: remove warning in hres_timers_resume
Joe Buehler (1):
x86: add PCI ID for 6300ESB force hpet
Krzysztof Oledzki (1):
x86: add another PCI ID for ICH6 force-hpet
Randy Dunlap (1):
acpi_pm clccksource: fix printk format warning
Thomas Gleixner (2):
pmtmr: allow command line override of ioport
kernel-paramaters: document pmtmr= command line option
Documentation/kernel-parameters.txt | 4 ++++
arch/x86/kernel/quirks.c | 4 ++++
drivers/clocksource/acpi_pm.c | 19 +++++++++++++++++++
kernel/hrtimer.c | 7 ++-----
kernel/posix-cpu-timers.c | 3 +++
kernel/time/tick-sched.c | 8 ++++++++
6 files changed, 40 insertions(+), 5 deletions(-)
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index b52f47d..f223863 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1571,6 +1571,10 @@ and is between 256 and 4096 characters. It is defined in the file
Format: { parport<nr> | timid | 0 }
See also Documentation/parport.txt.
+ pmtmr= [X86] Manual setup of pmtmr I/O Port.
+ Override pmtimer IOPort with a hex value.
+ e.g. pmtmr=0x508
+
pnpacpi= [ACPI]
{ off }
diff --git a/arch/x86/kernel/quirks.c b/arch/x86/kernel/quirks.c
index d89a648..f327aba 100644
--- a/arch/x86/kernel/quirks.c
+++ b/arch/x86/kernel/quirks.c
@@ -158,6 +158,8 @@ static void ich_force_enable_hpet(struct pci_dev *dev)
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB2_0,
ich_force_enable_hpet);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_0,
+ ich_force_enable_hpet);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_1,
ich_force_enable_hpet);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_0,
@@ -255,6 +257,8 @@ static void old_ich_force_enable_hpet_user(struct pci_dev *dev)
old_ich_force_enable_hpet(dev);
}
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_1,
+ old_ich_force_enable_hpet_user);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_0,
old_ich_force_enable_hpet_user);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_12,
diff --git a/drivers/clocksource/acpi_pm.c b/drivers/clocksource/acpi_pm.c
index 7b46faf..bcd7d0e 100644
--- a/drivers/clocksource/acpi_pm.c
+++ b/drivers/clocksource/acpi_pm.c
@@ -215,3 +215,22 @@ pm_good:
* but we still need to load before device_initcall
*/
fs_initcall(init_acpi_pm_clocksource);
+
+/*
+ * Allow an override of the IOPort. Stupid BIOSes do not tell us about
+ * the PMTimer, but we might know where it is.
+ */
+static int __init parse_pmtmr(char *arg)
+{
+ unsigned long base;
+
+ if (strict_strtoul(arg, 16, &base))
+ return -EINVAL;
+
+ printk(KERN_INFO "PMTMR IOPort override: 0x%04x -> 0x%04x\n",
+ (unsigned int)pmtmr_ioport, base);
+ pmtmr_ioport = base;
+
+ return 1;
+}
+__setup("pmtmr=", parse_pmtmr);
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index ab80515..ffca825 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -300,11 +300,10 @@ EXPORT_SYMBOL_GPL(ktime_sub_ns);
*/
u64 ktime_divns(const ktime_t kt, s64 div)
{
- u64 dclc, inc, dns;
+ u64 dclc;
int sft = 0;
- dclc = dns = ktime_to_ns(kt);
- inc = div;
+ dclc = ktime_to_ns(kt);
/* Make sure the divisor is less than 2^32: */
while (div >> 32) {
sft++;
@@ -632,8 +631,6 @@ void clock_was_set(void)
*/
void hres_timers_resume(void)
{
- WARN_ON_ONCE(num_online_cpus() > 1);
-
/* Retrigger the CPU local events: */
retrigger_next_event(NULL);
}
diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index f1525ad..c42a03a 100644
--- a/kernel/posix-cpu-timers.c
+++ b/kernel/posix-cpu-timers.c
@@ -1037,6 +1037,9 @@ static void check_thread_timers(struct task_struct *tsk,
sig->rlim[RLIMIT_RTTIME].rlim_cur +=
USEC_PER_SEC;
}
+ printk(KERN_INFO
+ "RT Watchdog Timeout: %s[%d]\n",
+ tsk->comm, task_pid_nr(tsk));
__group_send_sig_info(SIGXCPU, SEND_SIG_PRIV, tsk);
}
}
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index b854a89..86baa4f 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -48,6 +48,13 @@ static void tick_do_update_jiffies64(ktime_t now)
unsigned long ticks = 0;
ktime_t delta;
+ /*
+ * Do a quick check without holding xtime_lock:
+ */
+ delta = ktime_sub(now, last_jiffies_update);
+ if (delta.tv64 < tick_period.tv64)
+ return;
+
/* Reevalute with xtime_lock held */
write_seqlock(&xtime_lock);
@@ -228,6 +235,7 @@ void tick_nohz_stop_sched_tick(void)
local_softirq_pending());
ratelimit++;
}
+ goto end;
}
ts->idle_calls++;
--
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