Felipe Franciosi <fel...@nutanix.com> wrote: > Currently, the throttle_thread_scheduled flag is reset back to 0 before > sleeping (as part of the throttling logic). Given that throttle_timer > (well, any timer) may tick with a slight delay, it so happens that under > heavy throttling (ie. close or on CPU_THROTTLE_PCT_MAX) the tick may > schedule a further cpu_throttle_thread() work item after the flag reset, > but before the previous sleep completed. This results on the vCPU thread > sleeping continuously for potentially several seconds in a row. > > The chances of that happening can be drastically minimised by resetting > the flag after the sleep. > > Signed-off-by: Felipe Franciosi <fel...@nutanix.com> > Signed-off-by: Malcolm Crossley <malc...@nutanix.com>
Reviewed-by: Juan Quintela <quint...@redhat.com> Paolo, I think that the analisys makes sense. Should you pull this patch, or do you want me to pull it? Thanks, Juan.
