Re: [Xen-users] Question about ioemu ...

[Mark Williamson <mark.williamson@xxxxxxxxxxxx>]

> On Mon, Jan 07, 2008 at 01:31:53AM +0000, Mark Williamson wrote:
> | But in any case...  In an HVM domain you'll always be using the emulated
> | devices, unless you install PV drivers.  In a PV domain you're always
> | using the PV drivers anyhow.  The ioemu switch does not seem to have an
> | effect for block devices anymore.
>
> Hello ,
>
> To have better performance on a HVM domain , i must install PV drivers .
>
> Where i can find it ?
>
> My dom0 is centos 5.1 , but my guest os can be centos 4 / debian etch,sarge

They're in the unmodified_drivers directory in the Xen source tree.  To build 
these, you also need a copy of the XenLinux repository (although the build 
process might download that automatically for you).  You then need to compile 
them for your kernel.

Once you've done that I think you'd need to explicitly configure your system 
to actually use them so that it'll access the disks using the PV drivers and 
not just let the driver of the emulated hardware grab those devices.

Cheers,
Mark

-- 
Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!

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