Re: [Xen-devel] x86's context switch ordering of operations

["Jan Beulich" <jbeulich@xxxxxxxxxx>]

>>> Keir Fraser <keir.fraser@xxxxxxxxxxxxx> 29.04.08 15:58 >>>
>Um, good point, I'd forgotten exactly how the code fitted together. Anyhow,
>the reason you see ctxt_switch_{from,to} happening after set_current() is
>because context_switch() and __context_switch() can actually be decoupled.
>When switching to the idle vcpu we run context_switch() but we do not run
>__context_switch().

Okay, that could be easily dealt with by doing set_current() explicitly
in the switch-to-idle case, and moving it into __context_switch() in
the other cases.

Any word on the significance of doing write_ptbase() after calling
ctxt_switch_to()?

Jan


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