Patch-ID# 100126-04
Keywords: MBUF running out of mbufs
Synopsis: SunOS4.1 SunOS4.1_PSR_A SunOS4.1.1 SunOS4.0.3  MBUF PATCH
Date: 11/Dec/90

SunOS RELEASE: 4.0.3 4.1 4.1_PSR-A 4.1.1

Topic: Doubling MBUF size

BugID's fixed with this patch: 1033551 1032572 1032818 1041811
                               1047083

Architectures for which this patch is available:  
 sun4c-4.1, sun4c-4.1.1, sun3-4.1 sun3-4.1.1, sun3x-4.1.1
 sun4-4.0.3 sun4-4.1 sun4-4.1.1 sun4-4.1_PSR_A

Obsolete By: Next major release of SunOS

Problem Description: Running Out of mbufs.

BUGID: 1033551 1032572 1039734 1032818 1041811
                               1047083

      The mbuf is a system resource which can be run out.
      So it shouldn't really be a bug. However, this
      patch provides work around for it. It would certainly
      be nice if we can make MBUF size user configurable.


INSTALL:
Example is for a sun4 running 4.1
 make sure and use your correct architecture and SunOS release.

As root:

save the origional version as a precaution.

# mv /sys/sun4/OBJ/locore.o /sys/sun4/OBJ/locore.o.save
# mv /sys/sun4/OBJ/machdep.o /sys/sun4/OBJ/machdep.o.save
# mv /sys/sun4/OBJ/uipc_mbuf.o /sys/sun4/OBJ/uipc_mbuf.o.save

copy the new versions. checking your architecture type and OS rev.

this tells you your architecture type
# arch -k

this tells you your SunOS Release
# dmesg |more

Now using your architecture and SunOS release information;
(example is for a sun4 running SunOS 4.1)

# cp sun4/4.1/locore.o /sys/sun4/OBJ/locore.o
# cp sun4/4.1/machdep.o /sys/sun4/OBJ/machdep.o
# cp sun4/4.1/uipc_mbuf.o /sys/sun4/OBJ/uipc_mbuf.o

rerun /etc/config <kernel-name>
run make, and install the new kernel.
Please refer to the System and Networking Administration Manual
for details on building and installing a custom kernel