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SubjectRe: [RFC PATCH 01/35] Add XEN config options and disable unsupported config options.
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On Tuesday 09 May 2006 06:05, Adrian Bunk wrote:
> On Tue, May 09, 2006 at 12:00:01AM -0700, Chris Wright wrote:
> >...
> > --- linus-2.6.orig/arch/i386/Kconfig
> > +++ linus-2.6/arch/i386/Kconfig
> >...
> > config X86_IO_APIC
> > bool
> > - depends on X86_UP_IOAPIC || (SMP && !(X86_VISWS || X86_VOYAGER))
> > + depends on X86_UP_IOAPIC || (SMP && !(X86_VISWS || X86_VOYAGER || X86_XEN))
> > default y
> >...
>
> <nitpick>not required</nitpick>
>
> > --- linus-2.6.orig/kernel/Kconfig.hz
> > +++ linus-2.6/kernel/Kconfig.hz
> > @@ -3,7 +3,7 @@
> > #
> >
> > choice
> > - prompt "Timer frequency"
> > + prompt "Timer frequency" if !XEN
> > default HZ_250
> > help
> > Allows the configuration of the timer frequency. It is customary
> > @@ -40,7 +40,7 @@ endchoice
> >
> > config HZ
> > int
> > - default 100 if HZ_100
> > + default 100 if HZ_100 || XEN
> > default 250 if HZ_250
> > default 1000 if HZ_1000
> >...
>
> Why?

Guessing, but its probably to limit the number of parahypervisor calls.

Ed Tomlinson
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