Re: netbsd-5 i386 PAE dom0 + hvm domU winxp?

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Tue, Mar 23, 2010 at 04:47:43PM +0200, Jukka Marin wrote:
> This seems to be a problem of our NetBSD 4.0 firewall/router.  We have
> configured pf to limit the bandwidth used by the backups and with the
> upgraded server, something does not work right in the router.  Data flows
> at less than 10 KB/s.  If I disable the bandwidth limiting, backups work
> again (but our poor ARM based router suffers from extremely high interrupt
> load).  I'm now limiting backup bandwidth by piping the data through a
> simple program.
> 
> Two new questions have popped up:
> 
> Is it normal that running, say, bzip2 in dom0, slows down domU's quite
> a lot?  I'm compressing a large file and the hvm domain is now so slow
> that I thought it had died..

It could be possible if the dom0 start swapping, which slows down the qemu
process as well.

> 
> I tried envstat on dom0, but the process entered D state and it never seems
> to recover.  Wchan is tstile.  I have ipmi on the motherboard and it seems
> to be enabled in DOM0 kernels by default..  I think envstat worked in NetBSD
> 4.0, I wonder why it gets stuck in 5.0_STABLE?

No idea, I've never been hit by this issue (at last with envstat).
Is there other processes hung in tstile ?

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--