mbuf large clusters

[Randall Stewart]

Christian Brueffer wrote:

> 
> Not sure if I'm understanding you correctly, but kern.ipc.nmbclusters is
> a tunable not a sysctl, so it has to be set in /boot/loader.conf or at
> the loader prompt (see loader(8)).
> 

Not in current from what I see (if
I understand this correctly of course):
-----------------------------------------------------
static int
sysctl_nmbclusters(SYSCTL_HANDLER_ARGS)
{
	int error, newnmbclusters;

	newnmbclusters = nmbclusters;
	error = sysctl_handle_int(oidp, &newnmbclusters, sizeof(int), req);
	if (error == 0 && req->newptr) {
		if (newnmbclusters > nmbclusters) {
			nmbclusters = newnmbclusters;
			uma_zone_set_max(zone_clust, nmbclusters);
			EVENTHANDLER_INVOKE(nmbclusters_change);
		} else
			error = EINVAL;
	}
	return (error);
}
SYSCTL_PROC(_kern_ipc, OID_AUTO, nmbclusters, CTLTYPE_INT|CTLFLAG_RW,
&nmbclusters, 0, sysctl_nmbclusters, "IU",
     "Maximum number of mbuf clusters allowed");

-----------------------------------------------------

It looks to me like it lets you INCREASE the value from
the calculated system value.. but NOT shrink it :-0

R
-- 
Randall Stewart
NSSTG - Cisco Systems Inc.
803-345-0369 <or> 803-317-4952 (cell)