RE: [Xen-ia64-devel] Some things to be considered for ptc.ga emulation

["Xu, Anthony" <anthony.xu@xxxxxxxxx>]

>From: Tristan Gingold 
>To: Xu, Anthony; Tian, Kevin; xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
>The race is we don't invalidate while we had to.  This means a ptc.ga is
>concurrent to an itc.
>For me there is no race: the itc wins.  Of course, it may loose to do the cpu
>itc, but it doesn't matter.
>
Further think, yes, there is no race, some time itc win, some time ptc.ga win, 
If ptc.ga wins, it will impact performance ( extra tlb miss).

One more comment,
There maybe two vcpus running on same LP, in this situation, VHPT for this LP 
is purged twice.

Thanks,
Anthony


>Tristan.

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