On Wed, Sep 07, 2011 at 03:31:56PM +0800, Peter Zijlstra wrote:

On Wed, 2011-09-07 at 09:04 +0800, Wu Fengguang wrote:

quoted

So the sqrt naturally leads to less overheads and more N tolerance for
large memory servers, which have large (thresh-freerun) gaps.

Thanks, and as you say its an initial guess, later refined using patch
14.

Yes, exactly.

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