Messages in this thread |  | | From | Andy Shevchenko <> | Date | Sat, 22 Oct 2016 19:02:04 +0300 | Subject | Re: mmiotracer hangs the system |
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On Fri, Oct 14, 2016 at 12:12 AM, Karol Herbst <karolherbst@gmail.com> wrote: > sorry for the delay fixing that bug. I got occupied with other things > and didn't really got to the issue again, it is on my todo list as the > next item though and I hope I will be able to get a fix ready this > weekend. I think I might know where the issue is, but didn't confirm > it yet.
Thanks.I'm still using revert. Feel free to Cc me when you will have some material to test.
> > Again, sorry for the delay. > > Karol > > 2016-08-19 22:46 GMT+02:00 Karol Herbst <karolherbst@gmail.com>: >> Hi again, >> >> I was able to get a crash/freeze/something while unbinding/binding my >> nvidia gpu from nouveau. >> >> Guess that means something is odd. I will investigate this more over >> the weekend. >> >> 2016-08-19 17:35 GMT+02:00 Andy Shevchenko <andy.shevchenko@gmail.com>: >>> On Fri, Aug 19, 2016 at 6:08 PM, karol herbst <karolherbst@gmail.com> wrote: >>>> 2016-08-19 15:02 GMT+02:00 Andy Shevchenko <andy.shevchenko@gmail.com>: >>>>> On Fri, Aug 19, 2016 at 1:35 PM, karol herbst <karolherbst@gmail.com> wrote: >>>>>> is there any update on that issue I missed somehow? I really don't >>>>>> want to leave the mmiotracer in a state, where it breaks something >>>>>> while fixing other issues. >>>>> >>>>> No updates. I'm busy right now with more priority tasks and revert >>>>> works for me. Issue is reproducible in my case 100%. >>>>> >>>> >>>> Is there something I could do with a "normal" haswell desktop system >>>> to reproduce this issue? >>> >>> Try LPSS UART device(s) >>> >>>> >>>> I'll try to play around the next days a bit and maybe I find something >>>> that works out here as well. It seems to be related to >>>> unmapping-mapping cycles. >>> >>> That is the only thing I would think of. >>> >>>> >>>> Because if this only happens with the pwm-lpss driver, >>> >>> It has nothing to do with pwm-lpss since it's a HS UART and served by >>> intel-lpss driver. >>> >>>> it may be >>>> really troublesome to debug, because I don't really know the code that >>>> well to be sure where the issue might be. >>>> >>>>> So, I would able to attach dmesg in case it would be helpful. >>>>> Otherwise tell me exact instructions how to debug the issue. >>>>> >>>>> Here you are: >>>>> http://pastebin.com/raw/VfTZENt7 >>>>> >>>>>> But for now, without being able to even reproduce the issue, I can't >>>>>> really do much, because the code in the current state looks sane to >>>>>> me. Maybe this case includes the mmiotracer cleaning things up and >>>>>> arms new region for mmiotracing and that's why it fails? Besides that, >>>>>> I have no idea and no way to reproduce this, so I can't help this way. >>>>> >>>>> Maybe. First thing happened is iounmap(). >>> >>> >>> -- >>> With Best Regards, >>> Andy Shevchenko
-- With Best Regards, Andy Shevchenko
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