Re: [Xen-devel] [PATCH] x86: don't map more than the allocated space for frame_table

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 20/05/2009 06:28, "Jan Beulich" <JBeulich@xxxxxxxxxx> wrote:

> Also, make frame_table a 'mostly read' variable. Actually, I don't
> really understand why this has to be a variable on x86 at all -
> address calculations involving it could be cheaper if this was just
> a #define. Perhaps kexec is the only thing that needs this to be a
> variable, but if that indeed is the only reason, kexec should define
> its own static variable.

Would it really be much cheaper? Pointer load versus a 64-bit constant? If
you're sure it would be an improvement I would take a patch.

 -- Keir



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