Re: [Xen-ia64-devel] [PATCH] implemented vcpu_ptc_l()

[Isaku Yamahata <yamahata@xxxxxxxxxxxxx>]

On Tue, Dec 06, 2005 at 01:31:03PM +0800, Dong, Eddie wrote:

>       I think the para linux does not use ptc, does it on ski?

I disabled CONFIG_SMP manually because ski doesn't support smp.
(And I enabled some configs related to ski.)
para linux with CONFIG_SMP=n uses ptc.l.

Should I enable CONFIG_SMP?
If so, does following patch make sense?

--- linux-2.6-xen-sparse/arch/ia64/Kconfig      2005-12-01 20:12:25.000000000 
+0900
+++ linux-2.6-xen-sparse/arch/ia64/Kconfig_smp  2005-12-06 15:13:35.000000000 
+0900
@@ -49,6 +49,7 @@ config GENERIC_IOMAP
 config XEN
        bool
        default y
+       select SMP
        help
          Enable Xen hypervisor support.  Resulting kernel runs
          both as a guest OS on Xen and natively on hardware.


>       2 comments:
>       a:  Any reason to purge TR?
>       b: I believe there is a single SW TLB entry in non-VTI implementation, 
> if you do that, you'd better to check this too.

TR corresponds to itrs and dtrs. not dtlb, itlb.
dtlb and itlb are SW TLB entries which you mention.

-- 
yamahata

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