Re: rawhide report: 20050706 changes

[Dave Jones <davej redhat com>]

On Wed, Jul 06, 2005 at 02:59:37PM -0400, Alan Cox wrote:
 > On Wed, Jul 06, 2005 at 02:18:40PM -0400, Brian Gerst wrote:
 > > What about the bloat and slowdown because of the unnecessary spinlocks 
 > > and more complex scheduler code?
 > 
 > The locks shouldn't matter. AMD got locked operations on exclusive cache
 > lines right. Its generally only Intel boxes that had high lock costs.

And the only UP EM64T's I've seen have HT. Though, that could be
disabled, but I expect that the folks disabling it are in a minority.

 > Not sure on the scheduler.

It'll degenerate to a single runqueue on UP, so there shouldn't
be any of the complicated balancing going on.  Bloat-wise, it's
a tiny amount of change.

		Dave