On Mon, Aug 22, 2005 at 08:24:50AM -0700, Christoph Lameter wrote:

On Mon, 22 Aug 2005, Hugh Dickins wrote:

quoted

(Your deltas seem sensible, but hard to place the reaccumulation:
I worry that you may be taking page_table_lock more just for that.)

The page_table_lock is taken using a spin_trylock. Its skipped if 
contended.

Hmm - doesn't try lock cause a cache line bounce on the bus too? 
I think it does. That would mean its latency is not much better 
than a real spinlock (assuming it doesn't have to spin) 

-Andi
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