[PATCH v2] KVM: PPC: e500mc: Enhance tlb invalidation condition on vcpu schedule

[Scott Wood]

On Tue, 2014-06-17 at 12:02 +0300, Mihai Caraman wrote:
> On vcpu schedule, the condition checked for tlb pollution is too loose.
> The tlb entries of a vcpu become polluted (vs stale) only when a different
> vcpu within the same logical partition runs in-between. Optimize the tlb
> invalidation condition taking into account the logical partition id.
> 
> With the new invalidation condition, a guest shows 4% performance improvement
> on P5020DS while running a memory stress application with the cpu oversubscribed,
> the other guest running a cpu intensive workload.

See
https://lists.ozlabs.org/pipermail/linuxppc-dev/2014-June/118547.html

-Scott