RE: [patch 0/4] KVM/ia64 SN2 RTC backed ITC emulation
"Zhang, Xiantao" <[email protected]>
| Newsgroups | org.kernel.vger.kvm-ia64 |
|---|---|
| Message-ID | <706158FABBBA044BAD4FE898A02E4BC2242ED094@pdsmsx503.ccr.corp.intel.com> |
Jes
Thanks for your work! Okay, the patchset is good to me!
Ack-ed: Xiantao Zhang <[email protected]>
Avi,
Could you help to queue it for next merge window ?
Xiantao
[email protected] wrote:
> This set of patches switches KVM to use the SN2 RTC clock source as
> backing for the ITC emulation, as the ITC isn't synchronized on SN2.
>
> The RTC is a memory mapped register which needs to be mapped into the
> address space of the VMM module, and also accessed from the kernel. I
> could try and split the changes into seperate files, but I honestly
> thing it would cause more clutter than doing it this way.
>
> With this change I can boot 64 vcpus on ia64 at stable boot times,
> with the ITC backed ITC emulation, the boot would regularly hang for
> minutes because time would suddenly go backwards.
>
> Let me know what you think - this patch set is against Avi's tree as
> of earlier today.
>
> Cheers,
> Jes