BPF timers in hard irq context?

[Barret Rhoden <brho@xxxxxxxxxx>]

hi -

we've noticed some variability in bpf timer expiration that goes away if 
we change the timers to run in hardirq context.

i imagine the use of softirqs was to keep the potentially long-running 
timer callback out of hardirq, but is there anything particularly 
dangerous about making them run in hardirq?

would you all be open to a patch that makes that a flag or something? 
e.g. BPF_F_TIMER_HARDIRQ.

thanks,

barret