The patch titled
NOHZ: Rate limit the local softirq pending warning output
has been added to the -mm tree. Its filename is
nohz-rate-limit-the-local-softirq-pending-warning-output.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: NOHZ: Rate limit the local softirq pending warning output
From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
The warning in the NOHZ code, which triggers when a CPU goes idle with
softirqs pending can fill up the logs quite quickly. Rate limit the output
until we found the root cause of that problem.
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/time/tick-sched.c | 12 +++++++++---
1 files changed, 9 insertions(+), 3 deletions(-)
diff -puN kernel/time/tick-sched.c~nohz-rate-limit-the-local-softirq-pending-warning-output kernel/time/tick-sched.c
--- a/kernel/time/tick-sched.c~nohz-rate-limit-the-local-softirq-pending-warning-output
+++ a/kernel/time/tick-sched.c
@@ -167,9 +167,15 @@ void tick_nohz_stop_sched_tick(void)
goto end;
cpu = smp_processor_id();
- if (unlikely(local_softirq_pending()))
- printk(KERN_ERR "NOHZ: local_softirq_pending %02x\n",
- local_softirq_pending());
+ if (unlikely(local_softirq_pending())) {
+ static int ratelimit;
+
+ if (ratelimit < 10) {
+ printk(KERN_ERR "NOHZ: local_softirq_pending %02x\n",
+ local_softirq_pending());
+ ratelimit++;
+ }
+ }
now = ktime_get();
/*
_
Patches currently in -mm which might be from tglx@xxxxxxxxxxxxx are
ignore-bogus-acpi-info-for-offline-cpus.patch
nohz-rate-limit-the-local-softirq-pending-warning-output.patch
drm-spinlock-initializer-cleanup.patch
s390-spinlock-initializer-cleanup.patch
i386-hpet-check-if-the-counter-works.patch
-
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