The patch titled
clocksource: add verification (watchdog) helper, fix
has been added to the -mm tree. Its filename is
clocksource-add-verification-watchdog-helper-fix.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: clocksource: add verification (watchdog) helper, fix
From: Ingo Molnar <mingo@xxxxxxx>
If a clocksource is being verified by the watchdog, but the watchdog
clocksource is registered /after/ the possibly-unstable clocksource has been
registered, then when we switch that clocksource into high-res capable mode we
also need to propagate this fact to the rest of the system - so that it
properly switches into high-res mode.
this solves one particular system not entering high-res mode (but falling back
to low-res mode) - with this patch it properly enters high-res mode:
Switched to high resolution mode on CPU 0
Switched to high resolution mode on CPU 1
Switched to high resolution mode on CPU 2
Switched to high resolution mode on CPU 3
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: john stultz <johnstul@xxxxxxxxxx>
Cc: Roman Zippel <zippel@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
kernel/time/clocksource.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff -puN kernel/time/clocksource.c~clocksource-add-verification-watchdog-helper-fix kernel/time/clocksource.c
--- a/kernel/time/clocksource.c~clocksource-add-verification-watchdog-helper-fix
+++ a/kernel/time/clocksource.c
@@ -28,6 +28,7 @@
#include <linux/sysdev.h>
#include <linux/init.h>
#include <linux/module.h>
+#include <linux/tick.h>
/* XXX - Would like a better way for initializing curr_clocksource */
extern struct clocksource clocksource_jiffies;
@@ -106,8 +107,16 @@ static void clocksource_watchdog(unsigne
/* Initialized ? */
if (!(cs->flags & CLOCK_SOURCE_WATCHDOG)) {
if ((cs->flags & CLOCK_SOURCE_IS_CONTINUOUS) &&
- (watchdog->flags & CLOCK_SOURCE_IS_CONTINUOUS))
+ (watchdog->flags & CLOCK_SOURCE_IS_CONTINUOUS)) {
cs->flags |= CLOCK_SOURCE_VALID_FOR_HRES;
+ /*
+ * We just marked the clocksource as
+ * highres-capable, notify the rest of the
+ * system as well so that we transition
+ * into high-res mode:
+ */
+ tick_clock_notify();
+ }
cs->flags |= CLOCK_SOURCE_WATCHDOG;
cs->wd_last = csnow;
} else {
_
Patches currently in -mm which might be from mingo@xxxxxxx are
kvm-add-vm-exit-profiling-fix.patch
revert-nmi_known_cpu-check-during-boot-option-parsing.patch
paravirt-mark-the-paravirt_ops-export-internal.patch
kvm-make-sure-there-is-a-vcpu-context-loaded-when.patch
kvm-fix-race-between-mmio-reads-and-injected-interrupts.patch
kvm-x86-emulator-fix-bit-string-instructions.patch
kvm-fix-bogus-pagefault-on-writable-pages.patch
fix-config_compat_vdso.patch
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add-vm_alwaysdump.patch
i386-vdso-use-vm_alwaysdump.patch
i386-vdso-use-vm_alwaysdump-tidy.patch
x86_64-ia32-vdso-use-vm_alwaysdump.patch
powerpc-vdso-use-vm_alwaysdump.patch
x86_64-ia32-vdso-define-arch_vma_name.patch
acpi-fix-cpufreq-regression.patch
add-install_special_mapping.patch
i386-vdso-use-install_special_mapping.patch
x86_64-ia32-vdso-use-install_special_mapping.patch
powerpc-vdso-use-install_special_mapping.patch
use-correct-macros-in-raid-code-not-raw-asm.patch
use-correct-macros-in-raid-code-not-raw-asm-include.patch
acpi-i686-x86_64-fix-laptop-bootup-hang-in-init_acpi.patch
fix-for-crash-in-adummy_init.patch
fix-x86_64-mm-convert-i386-pda-code-to-use-%fs.patch
x86_64-do-not-enable-the-nmi-watchdog-by-default.patch
spin_lock_irq-enable-interrupts-while-spinning-preparatory-patch.patch
spin_lock_irq-enable-interrupts-while-spinning-x86_64-implementation.patch
spin_lock_irq-enable-interrupts-while-spinning-i386-implementation.patch
spin_lock_irq-enable-interrupts-while-spinning-i386-implementation-fix.patch
spin_lock_irq-enable-interrupts-while-spinning-i386-implementation-fix-fix.patch
i386-kwatch-kernel-watchpoints-using-cpu-debug-registers.patch
cpuset-remove-sched-domain-hooks-from-cpusets.patch
lockdep-also-check-for-freed-locks-in-kmem_cache_free.patch
lockdep-more-unlock-on-error-fixes.patch
lockdep-more-unlock-on-error-fixes-fix.patch
lockdep-add-graph-depth-information-to-proc-lockdep.patch
consolidate-default-sched_clock.patch
use-cycle_t-instead-of-u64-in-struct-time_interpolator.patch
proc-remove-useless-and-buggy-nlink-settings.patch
simplify-the-stacktrace-code.patch
audit-fix-audit_filter_user_rules-initialization-bug.patch
remove-references-to-obsolete-kernel-config-option-debug_rwsems.patch
add-irq-flag-to-disable-balancing-for-an-interrupt.patch
add-a-functions-to-handle-interrupt-affinity-setting.patch
hz-free-ntp.patch
uninline-jiffiesh-functions.patch
fix-multiple-conversion-bugs-in-msecs_to_jiffies.patch
fix-timeout-overflow-with-jiffies.patch
gtod-persistent-clock-support.patch
i386-use-gtod-persistent-clock-support.patch
i386-remove-useless-code-in-tscc.patch
simplify-the-registration-of-clocksources.patch
x86-rewrite-smp-tsc-sync-code.patch
clocksource-replace-is_continuous-by-a-flag-field.patch
clocksource-replace-is_continuous-by-a-flag-field-fix.patch
clocksource-fixup-is_continous-changes-on-arm.patch
clocksource-fixup-is_continous-changes-on-avr32.patch
clocksource-fixup-is_continous-changes-on-s390.patch
clocksource-fixup-is_continous-changes-on-mips.patch
clocksource-remove-the-update-callback.patch
clocksource-add-verification-watchdog-helper.patch
clocksource-add-verification-watchdog-helper-fix.patch
mark-tsc-on-geodelx-reliable.patch
uninline-irq_enter.patch
fix-cascade-lookup-of-next_timer_interrupt.patch
extend-next_timer_interrupt-to-use-a-reference-jiffie.patch
hrtimers-namespace-and-enum-cleanup.patch
hrtimers-namespace-and-enum-cleanup-vs-git-input.patch
hrtimers-cleanup-locking.patch
hrtimers-add-state-tracking.patch
hrtimers-clean-up-callback-tracking.patch
hrtimers-move-and-add-documentation.patch
acpi-fix-missing-include-for-up.patch
acpi-keep-track-of-timer-broadcasting.patch
allow-early-access-to-the-power-management-timer.patch
i386-apic-clean-up-the-apic-code.patch
clockevents-add-core-functionality.patch
tick-management-core-functionality.patch
tick-management-broadcast-functionality.patch
tick-management-dyntick--highres-functionality.patch
clockevents-i383-drivers.patch
i386-rework-local-apic-timer-calibration.patch
i386-prepare-for-dyntick.patch
i386-prepare-nmi-watchdog-for-dynticks.patch
i386-enable-dynticks-in-kconfig.patch
hrtimers-add-high-resolution-timer-support.patch
hrtimers-prevent-possible-itimer-dos.patch
add-debugging-feature-proc-timer_stat.patch
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time-x86_64-re-enable-vsyscall-support-for-x86_64-tidy.patch
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fsaio-add-a-wait-queue-arg-to-the-wait_bit-action-routine.patch
fsaio-rename-__lock_page-to-lock_page_blocking.patch
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sched-add-above-background-load-function.patch
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sched-cleanup-remove-task_t-convert-to-struct-task_struct-prefetch.patch
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scheduled-removal-of-sa_xxx-interrupt-flags-fixups-2.patch
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lockdep-show-held-locks-when-showing-a-stackdump-fix.patch
lockdep-show-held-locks-when-showing-a-stackdump-fix-2.patch
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