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[Xen-devel] Re: [PATCH, experimental] i386 Allow the fixmap to be relocated at boot time



On Fri, 2005-08-05 at 17:09 -0700, Zachary Amsden wrote:
> Also, it seems reasonable that people may want to poke holes in high 
> linear space for other hypervisor projects, research, or performance 
> reasons without having to build a custom sub-architecture just for 
> that.  So I think there is some benefit to making the hole size a 
> general configurable option (with defaults depending on the sub-arch you 
> select).

qemu-fast needs a kernel with __FIXADDR_TOP 0xa7fff000, and PAGE_OFFSET
0x90000000.  I used to continually patch my kernels, but these days I
just run full qemu and take the speed hit.  If this was easier, it would
be really nice to have that speed back.

Rusty.
-- 
A bad analogy is like a leaky screwdriver -- Richard Braakman


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