Messages in this thread | | | From | Kevin Hilman <> | Subject | Re: Possible regression due to "hrtimer: Get rid of hrtimer softirq" | Date | Fri, 08 May 2015 10:14:52 -0700 |
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Simon Horman <horms@verge.net.au> writes:
> Hi Thomas, > > On Thu, May 07, 2015 at 02:35:59PM +0200, Thomas Gleixner wrote: >> On Thu, 7 May 2015, Simon Horman wrote: >> > ------------[ cut here ]------------ >> > kernel BUG at kernel/irq_work.c:135! >> >> BUG_ON(!irqs_disabled()); >> >> So something enables interrupts in the periodic tick handling >> machinery. Seems you have high resolution timers disabled, but nohz >> enabled. And that code path has a local_irq_disable/enable pair which >> causes havoc. Patch below. > > Thanks for your quick response. I have been able to confirm that > when applied on top of next-20150507 the problem I observed no longer > manifests. I have successfully tested it on all the boards > where I previously observed a problem. > > If you are planning to formally submit the patch below feel free to add: > > Tested-by: Simon Horman <horms+renesas@verge.net.au>
FWIW, I confirmed this fixed a boot hang on my kzm9d in next-20150507 also.
Tested-by: Kevin Hilman <khilman@linaro.org>
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