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SubjectRe: [PATCH 0/5] ia64 ski emulator patches


On Fri, 24 Jan 2014, Mikael Pettersson wrote:

> Mikulas Patocka writes:
> > Hi
> >
> > Here I'm sending some ia64 patches to make it work in the ski emulator.
> > This has been broken for a long time.
>
> Thanks. I've recently started running 3.x kernels on ia64 via ski,
> but I'm getting random kernel crashes with 3.13. I'll give your
> patches a try shortly.

I also had some random page-table corruption when running recent kernels
in ski. The problems occured when upgrading the whole Debian distribution.
Kernel 2.6.8 was solid, new kernels caused problems, I don't know why.

> I've written a few patches to improve other aspects of running the
> kernel on ski:
> - ski patch to use tun/tap networking (no need to run ski as root)
> - ski patch to implement a fixed-frequency ITC (the ITC is currently
> highly variable, completely breaking basic timekeeping)
> - kernel patch to turn PAL_HALT_LIGHT into a new SSC_HALT_LIGHT,
> and a corresponing ski patch to pause() on SSC_HALT_LIGHT; this
> together with the fixed-frequency ITC patch allows ski to idle
> with very low host CPU overhead when the guest kernel idles
> - kernel patch to bump the RAM size from 130MB to 2GB
>
> I'd be happy to share these patches if there's interest in them.
>
> /Mikael

I would be interested in them. I also patched that timekeeping issue in
ski.

Mikulas


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