Subject: Re: vmstat and netstat....
To: Quentin Garnier <>
From: Garrett D'Amore <>
List: tech-kern
Date: 03/27/2006 08:01:22
Quentin Garnier wrote:
> On Mon, Mar 27, 2006 at 12:02:51PM +0200, wrote:
>>> It was recently pointed out that a few commands (vmstat, netstat)
>>> require a kernel file (/netbsd) in the root filesystem in order to
>>> provide, for example, accurate statistics.
>> That's not true.  When I added /dev/ksyms a few years ago I changed
>> the kvm routines to try that first.  Only if you have removed the
>> ksyms pseudo-device the tools will use the /netbsd namelist.
> In some situations ksyms are unusable because the kernel was passed
> wrong data about symbol table location.  This is the case when GRUB is
> used to boot netbsd directly.
> However, the Xen hypervisor doesn't seem to suffer from that issue, at
> least it doesn't on my installation.

Hmm... on a recent sparc64-current, I get:

garrett@salt{27}> vmstat -e
vmstat: undefined symbols: _intrnames _eintrnames _intrcnt _eintrcnt _bucket

Not sure what is going on here.  I've been more concerned with evbmips,
where there is *no* bootloader.

I'd much rather have this stuff use a sysctl rather than a kmem groveler
by default.

Garrett D'Amore, Principal Software Engineer
Tadpole Computer / Computing Technologies Division,
General Dynamics C4 Systems
Phone: 951 325-2134  Fax: 951 325-2191