Re: 2.6.15-rc5-rt4: BUG: swapper:0 task might have lost a preemption check!

["K.R. Foley" <kr@cybsft.com>]

Steven Rostedt wrote:
> On Fri, 2005-12-23 at 10:29 -0600, K.R. Foley wrote:
> 
>> OK. The BUG still exists (output below) but it does boot now with the
>> above patch applied (THANKS Steven!), which would seem to imply the two
>> weren't related. ARGH! :)
>>
>> Dec 23 10:16:27 porky kernel: Event source lapic installed with caps set: 06
>> Dec 23 10:16:27 porky kernel: BUG: swapper:0 task might have lost a
>> preemption check!
>> Dec 23 10:16:27 porky kernel: Brought up 2 CPUs
>> Dec 23 10:16:27 porky kernel: checking if image is initramfs... it is
>> Dec 23 10:16:27 porky kernel:  [<c010424e>] dump_stack+0x1e/0x20 (20)
>> Dec 23 10:16:27 porky kernel:  [<c011c9cf>]
>> preempt_enable_no_resched+0x5f/0x70 (20)
>> Dec 23 10:16:27 porky kernel:  [<c0100ff2>] cpu_idle+0xb2/0x100 (40)
>> Dec 23 10:16:27 porky kernel:  [<c0111446>]
>> start_secondary+0x296/0x340<6>Freeing initrd memory: 452k freed
>>
> 
> Yeah, I've seen the "might have lost a preemption check" too. But since
> this didn't seem to cause a problem booting my kernel (yet), it went to
> the end of the todo list.
> 
> Does this cause any other problems?
> 
> -- Steve
> 
> 
> 
No. Hasn't for me, yet and Lee said it's harmless for him also.

Thanks again.

-- 
   kr