Hi Adrian,
On Sat, Oct 1, 2011 at 11:26 AM, Adrian Chadd <adrian@freebsd.org> wrote:
> Author: adrian
> Date: Sat Oct 1 05:56:25 2011
> New Revision: 225892
> URL: http://svn.freebsd.org/changeset/base/225892
>
> Log:
> Disable using wait in cpu_idle() until a better solution to timer and
> interrupt handling can be implemented.
Taking out the whole thing looks like an overkill here - this is
especially bad on XLR where busy wait on a hardware thread will take
away cycles from the other hardware threads.
The better workaround would be to revert to the version before
r216862, which does not have the critical_enter/cpu_idleclock.
JC.