kern/101689: [panic] kmem_malloc in UMA

[Kris Kennaway]

The following reply was made to PR kern/101689; it has been noted by GNATS.

From: Kris Kennaway <kris at obsecurity.org>
To: Andrej Zverev <az at FreeBSD.org>
Cc: FreeBSD-gnats-submit at FreeBSD.org
Subject: Re: kern/101689: [panic] kmem_malloc in UMA
Date: Sat, 19 Aug 2006 16:17:54 -0400

 On Wed, Aug 09, 2006 at 12:39:44PM +0400, Andrej Zverev wrote:
 > 
 > >Number:         101689
 > >Category:       kern
 > >Synopsis:       [panic] kmem_malloc in UMA
 > >Confidential:   no
 > >Severity:       serious
 > >Priority:       low
 > >Responsible:    freebsd-bugs
 > >State:          open
 > >Quarter:        
 > >Keywords:       
 > >Date-Required:
 > >Class:          sw-bug
 > >Submitter-Id:   current-users
 > >Arrival-Date:   Wed Aug 09 08:40:13 GMT 2006
 > >Closed-Date:
 > >Last-Modified:
 > >Originator:     Andrej Zverev
 > >Release:        
 > >Organization:
 > >Environment:
 > 
 > 
 > 	
 > >Description:
 > 	I'm trying to create > 20000 vlan interfaces.
 > 	#!/usr/bin/perl
 > 
 > 	for ($i=0; $i<20000; $i++)
 > 	{
 > 		system ("ifconfig vlan$i create");
 > 		system ("ifconfig vlan$i vlan 10 vlandev rl0 10.10.10.10/24");
 > 	}
 > 
 > 	and then system out of memory, panic happens, but it's not right.
 > 	Trace of panic attached, if i can provide extra detail, just ask
 
 Your ran your kernel out of memory.  Try to tune VM_KMEM_SIZE_MAX in
 your kernel, e.g. on my heavily loaded servers I use:
 
 options         VM_KMEM_SIZE_MAX=419430400      #400MB
 
 Kris