softclock swis not bound to specific cpu

From: Taku YAMAMOTO <taku_at_tackymt.homeip.net> Date: Sun, 18 Oct 2009 20:24:07 +0900 · This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:39:57 UTC

I noticed that the softclock threads didn't seem to be bound to any cpu.

I'm not sure whether it's the Right Thing (TM) to bind them to the
corresponding cpus though: it might be good to give the scheduler a chance
to rebalance callouts.

I'm about to test the modification like the attached diff.
Comments are welcome.

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