Re: Disk Issues?

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

On Wed, Jul 22, 2009 at 04:00:18PM -0700, Erik Berls wrote:
> Hi,
> 
> A quick scan of the list didn't turn anything up, but I would have
> otherwise thought that people would have noticed this:
> 
> I'm seeing issues with *disk* IO under HVM that doesn't exist under PV.
> 
> Setup:
> Hardware:
> - Dual core AMD64
> - 4G RAM
> - 250G HD  (with a local mount point called /n/xen)
> - dual ethernet
> 
> dom0:
> - netbsd/amd64 5.0_RC2 XEN3_DOM0
> - 256M allocation
> 
> domU - HVM
> - netbsd/amd64 5.0_RC2 GENERIC
> - 2048M allocation
> - file:/n/xen/IMG/dev0,ioemu:hda,w  phy:/dev/wd0e,hba,w
> file:/n/xen/NetBSD5/amd64cd.iso,ioemu:hdc,r
> 
> domU - PV
> - netbsd/amd64 5.0_RC2 XEN3_DOMU
> - 2048M allocation
> - file:/n/xen/IMG/dev0,0x03,w  phy:/dev/wd0e,0x04,w
> 
> 
> Under HVM:
> * On boot I get lost interrupts for the phy: drive(s) [originally the
> first drive was a phy: as well].
> * I can pull a disklabel off the drive, but attempting to mount
> results in timeouts and eventual failure.
> * file: access randomly hangs;  extracting sets on the install paused
> midway through and only completed a couple of 10s of _minutes_ later.
> (sysinst reported -stalled-)

Looks like interrupt routing issues. Did you try disabling ACPI in the
HVM domU ?

-- 
Manuel Bouyer, LIP6, Universite Paris VI.           
Manuel.Bouyer%lip6.fr@localhost
     NetBSD: 26 ans d'experience feront toujours la difference
--