On Wed, Jan 18, 2006 at 10:19:01AM -0800, Sean Hefty wrote: > Roland Dreier wrote: > > > + UCMA_MAX_BACKLOG = 128 > > > >Is there any reason that we might want to make this a tunable? Maybe > >as a module parameter that's writable in sysfs... > > There's no reason not to make this tunable.
Yes, there are reasons to NOT make something a tunable: o increases system complexity (admin) o increases the amount of documentation (learning curve) o increases test matrix/cost (devel/support cost) o generally hurts performance (var vs a constant of the same value) Any reason to make something a tunable has to compensate for the above drawbacks. An answer to Roland's question is a reasonable prerequisite if someone wants add a tunable. IB doesn't have the much in /sys/class/infiniband* or module parameters and I think that's a Good Thing. grant - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
