Re: [kvm-devel] [ANNOUNCE] kvm-51 release

[Haydn S. <hay...@gm...>]

On Nov 8, 2007 12:51 AM, Avi Kivity <av...@qu...> wrote:

> Haydn Solomon wrote:
> > First , thank you for new release of kvm. I have a few problems to
> > report with kvm-51.
> >
> > 1. When running an exisiting winxp ACPI multiprocessor HAL with -smp
> > 2, sometimes it will hang on boot.
>
> This isn't new.  It isn't reported because few people run smp Windows,
> as prior to FlexPriority/tpr-opt it was unbearably slow.


>
> I'll look unto it.


thanks.


>
>
> > 2. This may not be a major problem but cpu usage is a litte higher
> > when idle on release 51 than 50. It was very low on 50, the lowest
> > I've seen in a long time.
>
> It shouldn't have changed.  What do you see?  Can you provide a snapshot
> of kvm_stat while Windows is idling (a few minutes after load)?


I went back to kvm-50 and tested and realized that load now is about same as
on kvm-51 now. However, since running release 50 I upgraded my kernel
(Fedora 7) and didn't pay attention to load after the upgrade so I'm pretty
sure this cpu usage thing is kernel related.


>
>
> > 3. For me personally, the best performing release to date is release 50.
>
> kvm-51 shouldn't be all that different; it's mostly AMD stability
> improvements and the FlexPriority smp fix.


This opinion was really based on cpu usage but explained above.


>
>
> >
> > Regards
> >
> > Haydn
> >
> > Avi Kivity wrote:
> >> If you're having trouble on AMD systems, please try this out.
> >>
> >> Changes from kvm-50:
> >> - fix some x86 emulator one-byte insns (fixes W2K3 installer again)
> >> - fix host hangs with NMI watchdog on AMD
> >> - fix guest SMP on AMD
> >> - fix dirty page tracking when clearing a guest page (Dor Laor)
> >> - more portability work (Hollis Blanchard, Jerone Young)
> >> - fix FlexPriority with guest smp (Sheng Yang)
> >> - improve rpm specfile (Akio Takebe, me)
> >> - fix external module vs portability work (Andrea Arcangeli)
> >> - remove elpin bios due to license violation
> >> - testsuite shutdown pio port
> >> - don't advertise svm on the guest
> >> - fix reset with kernel apic (Markus Rechberger)
> >>
> >>
> >> Notes:
> >>       If you use the modules bundled with kvm-51, you can use any
> version
> >> of Linux from 2.6.9 upwards.
> >>       If you use the modules bundled with Linux 2.6.20, you need to use
> >> kvm-12.
> >>       If you use the modules bundled with Linux 2.6.21, you need to use
> >> kvm-17.
> >>       Modules from Linux 2.6.22 and up will work with any kvm version
> from
> >> kvm-22.  Some features may only be available in newer releases.
> >>       For best performance, use Linux 2.6.23-rc2 or later as the host.
> >>
> >> http://kvm.qumranet.com
> >>
> >>
> >>
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> >>
> > adfdf
>
>
> --
> Do not meddle in the internals of kernels, for they are subtle and quick
> to panic.
>
>