On Tue, Sep 11, 2001 at 05:23:01PM +0530, Dipankar Sarma wrote:
> In article <20010911131238.N715@athlon.random> you wrote:
> > many thanks. At the moment my biggest concern is about the need of
> > call_rcu not to be starved by RT threads (keventd can be starved so then
> > it won't matter if krcud is RT because we won't start using it).
>
> > Andrea
>
> I think we can avoid keventd altogether by using a periodic timer (say 10ms)
> to check for completion of an RC update. The timer may be active
> only if only if there is any RCU going on in the system - that way
> we still don't have any impact on the rest of the kernel.
the timer can a have bigger latency than keventd calling wait_for_rcu
so it should be a loss in a stright bench with light load, but OTOH we
only care about getting those callbacks executed eventually and the
advantage I can see is that the timer cannot get starved.
Andrea
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Sat Sep 15 2001 - 21:00:32 EST