The patch titled
dynticks: core, NMI watchdog fix
has been added to the -mm tree. Its filename is
dynticks-core-nmi-watchdog-fix.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: dynticks: core, NMI watchdog fix
From: Ingo Molnar <mingo@xxxxxxx>
Fix an NMI-watchdog interaction: we dont want to call
hrtimer_update_jiffies() in NMI contexts ...
Create __irq_enter() (which is symmetric to __irq_exit()) and use it in
nmi_enter() and irq_enter().
[ Note: like __irq_exit() it needs to be a macro because
hardirq.h is included early on and types like struct
task_struct are not available yet. ]
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>
---
include/linux/hardirq.h | 12 +++++++++++-
kernel/softirq.c | 5 +----
2 files changed, 12 insertions(+), 5 deletions(-)
diff -puN include/linux/hardirq.h~dynticks-core-nmi-watchdog-fix include/linux/hardirq.h
--- a/include/linux/hardirq.h~dynticks-core-nmi-watchdog-fix
+++ a/include/linux/hardirq.h
@@ -106,6 +106,16 @@ static inline void account_system_vtime(
* always balanced, so the interrupted value of ->hardirq_context
* will always be restored.
*/
+#define __irq_enter() \
+ do { \
+ account_system_vtime(current); \
+ add_preempt_count(HARDIRQ_OFFSET); \
+ trace_hardirq_enter(); \
+ } while (0)
+
+/*
+ * Enter irq context (on NO_HZ, update jiffies):
+ */
extern void irq_enter(void);
/*
@@ -123,7 +133,7 @@ extern void irq_enter(void);
*/
extern void irq_exit(void);
-#define nmi_enter() do { lockdep_off(); irq_enter(); } while (0)
+#define nmi_enter() do { lockdep_off(); __irq_enter(); } while (0)
#define nmi_exit() do { __irq_exit(); lockdep_on(); } while (0)
#endif /* LINUX_HARDIRQ_H */
diff -puN kernel/softirq.c~dynticks-core-nmi-watchdog-fix kernel/softirq.c
--- a/kernel/softirq.c~dynticks-core-nmi-watchdog-fix
+++ a/kernel/softirq.c
@@ -278,10 +278,7 @@ EXPORT_SYMBOL(do_softirq);
*/
void irq_enter(void)
{
- account_system_vtime(current);
- add_preempt_count(HARDIRQ_OFFSET);
- trace_hardirq_enter();
-
+ __irq_enter();
#ifdef CONFIG_NO_HZ
if (idle_cpu(smp_processor_id()) && !in_interrupt())
hrtimer_update_jiffies();
_
Patches currently in -mm which might be from mingo@xxxxxxx are
origin.patch
forcedeth-hardirq-lockdep-warning.patch
bonding-lockdep-annotation.patch
spinlock-debug-all-cpu-backtrace.patch
spinlock-debug-all-cpu-backtrace-fix.patch
spinlock-debug-all-cpu-backtrace-fix-2.patch
spinlock-debug-all-cpu-backtrace-fix-3.patch
remove-the-old-bd_mutex-lockdep-annotation.patch
new-bd_mutex-lockdep-annotation.patch
nfsd-lockdep-annotation.patch
sched-force-sbin-init-off-isolated-cpus.patch
sched-remove-unnecessary-sched-group-allocations.patch
sched-remove-unnecessary-sched-group-allocations-fix.patch
lower-migration-thread-stop-machine-prio.patch
sched-introduce-child-field-in-sched_domain.patch
sched-cleanup-sched_group-cpu_power-setup.patch
sched-fixing-wrong-comment-for-find_idlest_cpu.patch
scheduler-numa-aware-placement-of-sched_group_allnodes.patch
sched-add-above-background-load-function.patch
mm-implement-swap-prefetching.patch
sched-cleanup-remove-task_t-convert-to-struct-task_struct-prefetch.patch
genirq-convert-the-x86_64-architecture-to-irq-chips.patch
genirq-convert-the-i386-architecture-to-irq-chips.patch
genirq-irq-convert-the-move_irq-flag-from-a-32bit-word-to-a-single-bit.patch
genirq-irq-add-moved_masked_irq.patch
genirq-x86_64-irq-reenable-migrating-irqs-to-other-cpus.patch
genirq-msi-simplify-msi-enable-and-disable.patch
genirq-msi-make-the-msi-boolean-tests-return-either-0-or-1.patch
genirq-msi-implement-helper-functions-read_msi_msg-and-write_msi_msg.patch
genirq-msi-refactor-the-msi_ops.patch
genirq-msi-simplify-the-msi-irq-limit-policy.patch
genirq-irq-add-a-dynamic-irq-creation-api.patch
genirq-ia64-irq-dynamic-irq-support.patch
genirq-i386-irq-dynamic-irq-support.patch
genirq-x86_64-irq-dynamic-irq-support.patch
genirq-msi-make-the-msi-code-irq-based-and-not-vector-based.patch
genirq-x86_64-irq-move-msi-message-composition-into-io_apicc.patch
genirq-i386-irq-move-msi-message-composition-into-io_apicc.patch
genirq-msi-only-build-msi-apicc-on-ia64.patch
genirq-x86_64-irq-remove-the-msi-assumption-that-irq-==-vector.patch
genirq-i386-irq-remove-the-msi-assumption-that-irq-==-vector.patch
genirq-irq-remove-msi-hacks.patch
genirq-irq-generalize-the-check-for-hardirq_bits.patch
genirq-x86_64-irq-make-the-external-irq-handlers-report-their-vector-not-the-irq-number.patch
genirq-x86_64-irq-make-vector_irq-per-cpu.patch
genirq-x86_64-irq-make-vector_irq-per-cpu-warning-fix.patch
genirq-x86_64-irq-kill-gsi_irq_sharing.patch
genirq-x86_64-irq-kill-irq-compression.patch
msi-simplify-msi-sanity-checks-by-adding-with-generic-irq-code.patch
msi-only-use-a-single-irq_chip-for-msi-interrupts.patch
msi-refactor-and-move-the-msi-irq_chip-into-the-arch-code.patch
msi-move-the-ia64-code-into-arch-ia64.patch
htirq-tidy-up-the-htirq-code.patch
genirq-clean-up-irq-flow-type-naming.patch
gtod-exponential-update_wall_time.patch
gtod-persistent-clock-support-core.patch
gtod-persistent-clock-support-i386.patch
time-uninline-jiffiesh.patch
time-fix-msecs_to_jiffies-bug.patch
time-fix-timeout-overflow.patch
cleanup-uninline-irq_enter-and-move-it-into-a.patch
dynticks-extend-next_timer_interrupt-to-use-a.patch
hrtimers-namespace-and-enum-cleanup.patch
hrtimers-clean-up-locking.patch
hrtimers-state-tracking.patch
hrtimers-clean-up-callback-tracking.patch
hrtimers-move-and-add-documentation.patch
clockevents-core.patch
clockevents-drivers-for-i386.patch
high-res-timers-core.patch
high-res-timers-core-fix.patch
dynticks-core.patch
dynticks-core-nmi-watchdog-fix.patch
dyntick-add-nohz-stats-to-proc-stat.patch
dynticks-i386-arch-code.patch
high-res-timers-dynticks-enable-i386-support.patch
debugging-feature-timer-stats.patch
detect-atomic-counter-underflows.patch
debug-shared-irqs.patch
make-frame_pointer-default=y.patch
mutex-subsystem-synchro-test-module.patch
vdso-print-fatal-signals.patch
vdso-improve-print_fatal_signals-support-by-adding-memory-maps.patch
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