Re: SMP IPI issues on Loongson 3A based machines

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On Sat, Jul 26, 2014 at 02:05:28PM +0800, 陈华才 wrote:
> Hi,
> 
> I'm debugging, please wait for some time.

Great, thanks! Does it means you have been able to reproduce the issue?
If not I can provide you a copy of the chroot I used to reproduce the
issue.

I also tried with the kernel from
http://dev.lemote.com/cgit/linux-official.git/ but unfortunately 
I haven't been able to get it working correctly with
PREEMPT_VOLUNTARY=yes. I have tried with the kernel from the master
branch and after merging the v3.15.6 tag. In one of the case I got the
following backtrace on the serial console:

| [   75.128906] irq 17, desc: ffffffff80c911e0, depth: 1, count: 0, unhandled: 0
| [   75.136718] ->handle_irq():  ffffffff80289a18, handle_bad_irq+0x0/0x2d0
| [   75.144531] ->irq_data.chip(): ffffffff80cbe210, 0xffffffff80cbe210
| [   75.144531] ->action():           (null)
| [   75.144531]    IRQ_NOPROBE set
| [   75.144531] unexpected IRQ # 17

Aurelien

-- 
Aurelien Jarno                          GPG: 4096R/1DDD8C9B
aurelien@xxxxxxxxxxx                 http://www.aurel32.net


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