On 27/06/2016:10:19:07 AM, Pratyush Anand wrote: > On 21/06/2016:10:25:34 AM, Pratyush Anand wrote: > > We have observed on few machines with rtc-cmos device that > > hpet_rtc_interrupt() is called before cmos_do_probe() could call > > hpet_rtc_timer_init(). It has not been observed during normal boot/reboot > > of machines. It *sometime* happens when system is booted with kdump > > secondary kernel. So, neither hpet_default_delta nor hpet_t1_cmp is > > initialized by the time interrupt is raised in the given situation. > > Therefore while loop of hpet_cnt_ahead() in hpet_rtc_timer_reinit() never > > completes. This leads to "NMI watchdog: Watchdog detected hard LOCKUP on > > cpu 0". > > > > I am still clueless, how can an interrupt be raised before RTC is enabled. > > But i do not have any idea about this device, so I am putting this patch as > > RFC to get feedback from hpet/rtc-cmos developer. I am sure there would be > > some better solution than this. > > Do you think that if I improve commit log of patches as pointed by Thomas and > send a formal version of these patches, then they should acceptable to > upstream?
A gentle reminder for your comment/feedback :-) ~Pratyush
