Re: [Xen-devel] context switch

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 29 Mar 2006, at 01:49, Ky Srinivasan wrote:

> What are your thoughts on having a mechanism to manage hypervisor
> preemption from guest kernels?
Potentially a scheduler activations interface would be nice for SMP 
guests, if it's not too hard to modify the OS to support it. I don't 
see how a preemption aware interface would improve 
prepare_arch_switch() though -- I already said that failsafe_handler() 
should pick up the slack if you remove selector zeroing from 
prepare_arch_switch(). You may get some noise from Xen on a debug 
build, but things should carry on working just fine.
If I'm missing your point, you need to give some more details about 
what you're proposing. :-)
 -- Keir


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