Subject: kern/3374: if_de loses mbufs
To: None <>
From: Matthias Scheler <>
List: netbsd-bugs
Date: 03/21/1997 21:51:23
>Number:         3374
>Category:       kern
>Synopsis:       if_de loses mbufs
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people (Kernel Bug People)
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Mar 21 13:05:02 1997
>Originator:     Matthias Scheler
Matthias Scheler                      
>Release:        970319
System: NetBSD lyssa 1.2D NetBSD 1.2D (LYSSA) #0: Thu Mar 20 02:37:00 MET 1997 tron@lyssa:/usr/src/sys/arch/i386/compile/LYSSA i386

The new "if_de" driver seems to lose lots of kernel memory space due to
unfreed mbuf structures. This leeds sooner or later to a panic if the
kernel runs out of memory.

Boot a system with a Tulip ethernet card and use "netstat -m" several
times. After only 2 hours uptime my system has 3082 mbufs allocated
after only light network activity.

I'm still searching... :-(