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Re: [Xen-devel] context switch

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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