Re: [PATCH] RCU for low latency (experimental)

[Dipankar Sarma <dipankar@in.ibm.com>]

On Thu, Mar 25, 2004 at 12:34:30AM +0100, Andrea Arcangeli wrote:
> On Thu, Mar 25, 2004 at 04:41:45AM +0530, Dipankar Sarma wrote:
> > That was not 16 callbacks per tick, it was 16 callbacks in one
> > batch of a single softirq. And then I reschedule the RCU tasklet
> 
> sorry so you're already using tasklets in current code? I misunderstood
> the current code then.

+               if (count >= rcumaxbatch) {
+                       RCU_plugticks(cpu) = rcuplugticks;
+                       if (!RCU_plugticks(cpu))
+                               tasklet_hi_schedule(&RCU_tasklet(cpu));
+                       break;
+               }

That does it. Although, the tasklet handler needs to optimized
to for such frequent rescheduling when there isn't anything
else to process in that cpu. Later.

Thanks
Dipankar