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    SubjectRe: [RFC PATCH 01/35] Add XEN config options and disable unsupported config options.
    Date
    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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