lkml.org 
[lkml]   [2015]   [May]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: Possible regression due to "hrtimer: Get rid of hrtimer softirq"
Date
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>


\
 
 \ /
  Last update: 2015-05-08 19:21    [W:0.043 / U:0.224 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site