Re: [PATCH] kernel/sysrq: reset watchdog on all CPUs while processing sysrq-w

2016-06-08 Thread Andrey Ryabinin
On 06/08/2016 04:13 PM, Ingo Molnar wrote: > > * Andrey Ryabinin wrote: > >> Lengthy output of sysrq-w may take a lot of time on slow serial console. >> Currently we reset NMI-watchdog on the current CPU to avoid softlockup. >> Sometimes this doesn't work since

Re: [PATCH] kernel/sysrq: reset watchdog on all CPUs while processing sysrq-w

2016-06-08 Thread Andrey Ryabinin
On 06/08/2016 04:13 PM, Ingo Molnar wrote: > > * Andrey Ryabinin wrote: > >> Lengthy output of sysrq-w may take a lot of time on slow serial console. >> Currently we reset NMI-watchdog on the current CPU to avoid softlockup. >> Sometimes this doesn't work since watchdog might trigger on the

Re: [PATCH] kernel/sysrq: reset watchdog on all CPUs while processing sysrq-w

2016-06-08 Thread Ingo Molnar
* Andrey Ryabinin wrote: > Lengthy output of sysrq-w may take a lot of time on slow serial console. > Currently we reset NMI-watchdog on the current CPU to avoid softlockup. > Sometimes this doesn't work since watchdog might trigger on the other > CPU which is waiting

Re: [PATCH] kernel/sysrq: reset watchdog on all CPUs while processing sysrq-w

2016-06-08 Thread Ingo Molnar
* Andrey Ryabinin wrote: > Lengthy output of sysrq-w may take a lot of time on slow serial console. > Currently we reset NMI-watchdog on the current CPU to avoid softlockup. > Sometimes this doesn't work since watchdog might trigger on the other > CPU which is waiting for an IPI to proceed. >

[PATCH] kernel/sysrq: reset watchdog on all CPUs while processing sysrq-w

2016-05-27 Thread Andrey Ryabinin
Lengthy output of sysrq-w may take a lot of time on slow serial console. Currently we reset NMI-watchdog on the current CPU to avoid softlockup. Sometimes this doesn't work since watchdog might trigger on the other CPU which is waiting for an IPI to proceed. Reset watchdog on all CPUs to prevent

[PATCH] kernel/sysrq: reset watchdog on all CPUs while processing sysrq-w

2016-05-27 Thread Andrey Ryabinin
Lengthy output of sysrq-w may take a lot of time on slow serial console. Currently we reset NMI-watchdog on the current CPU to avoid softlockup. Sometimes this doesn't work since watchdog might trigger on the other CPU which is waiting for an IPI to proceed. Reset watchdog on all CPUs to prevent