On Thu, Feb 28, 2008 at 05:17:33PM -0600, Jack Steiner wrote: > I disagree. The location of the callout IS a performance issue. In simple > comparisons of the 2 patches (Christoph's vs. Andrea's), Andrea's has a 7X > increase in the number of TLB purges being issued to the GRU. TLB flushing Are you sure that you're referring to #v7?