[PATCH] Remove barriers from the SLB shadow buffer update

[Josh Boyer]

On Fri, 2007-08-24 at 16:58 +1000, Michael Neuling wrote:
> After talking to an IBM POWER hypervisor design and development (PHYP)
> guy, there seems to be no need for memory barriers when updating the SLB
> shadow buffer provided we only update it from the current CPU, which we
> do.
> 
> Also, these guys see no need in the future for these barriers.

Does this result in a significant performance gain?  I'm just curious.

josh