Re: [Xen-devel] context switch

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 28 Mar 2006, at 20:35, Keir Fraser wrote:

> We should probably just rely on the failsafe_handler actually 
> (assuming it now works :-) ).
> That 'slow path' will be taken so infrequently it's not worth having a 
> special prepare_arch_switch() for Xen. It's really a hangover from the 
> initial port from i386.
Actually, we do still need to be sure to save the segment values before 
switching TLS/LDT, so I guess we do need most of prepare_arch_switch 
even on x86/64.
We can't do the work in switch_mm() since lazy tlb logic may cause it 
to not be executed. And switch_to() is too late.
 -- Keir


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