Author: np
Date: Thu Oct 11 23:02:35 2012
New Revision: 241468
URL: http://svn.freebsd.org/changeset/base/241468
Log:
MFC r239624:
Allow nmbjumbop, nmbjumbo9, and nmbjumbo16 to be set directly via loader
tunables.
Modified:
stable/9/sys/kern/kern_mbuf.c
Directory Properties:
stable/9/sys/ (props changed)
Modified: stable/9/sys/kern/kern_mbuf.c
==============================================================================
--- stable/9/sys/kern/kern_mbuf.c Thu Oct 11 22:46:20 2012
(r241467)
+++ stable/9/sys/kern/kern_mbuf.c Thu Oct 11 23:02:35 2012
(r241468)
@@ -110,14 +110,23 @@ struct mbstat mbstat;
static void
tunable_mbinit(void *dummy)
{
- TUNABLE_INT_FETCH("kern.ipc.nmbclusters", &nmbclusters);
/* This has to be done before VM init. */
+ TUNABLE_INT_FETCH("kern.ipc.nmbclusters", &nmbclusters);
if (nmbclusters == 0)
nmbclusters = 1024 + maxusers * 64;
- nmbjumbop = nmbclusters / 2;
- nmbjumbo9 = nmbjumbop / 2;
- nmbjumbo16 = nmbjumbo9 / 2;
+
+ TUNABLE_INT_FETCH("kern.ipc.nmbjumbop", &nmbjumbop);
+ if (nmbjumbop == 0)
+ nmbjumbop = nmbclusters / 2;
+
+ TUNABLE_INT_FETCH("kern.ipc.nmbjumbo9", &nmbjumbo9);
+ if (nmbjumbo9 == 0)
+ nmbjumbo9 = nmbclusters / 4;
+
+ TUNABLE_INT_FETCH("kern.ipc.nmbjumbo16", &nmbjumbo16);
+ if (nmbjumbo16 == 0)
+ nmbjumbo16 = nmbclusters / 8;
}
SYSINIT(tunable_mbinit, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, tunable_mbinit,
NULL);
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