On Thu, Aug 16, 2007 at 10:04:24PM -0400, Chris Snook wrote:

quoted

Could you please cite the file/function names so we can
see whether removing the barrier makes sense?

At a glance, several architectures' implementations of smp_call_function() 
have one or more legitimate atomic_read() busy-waits that shouldn't be 
using CPU-relax.  Some of them do work in the loop.

Care to name one so we can discuss it?

Thanks,
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