> #define task_running(rq, p) \
> ((rq)->curr == (p)) && !spin_is_locked(&(p)->switch_lock)
one more implementational note: the above test is not 'sharp' in the sense
that on SMP it's only correct (the test has no barriers) if the runqueue
lock is held. This is true for all the critical task_running() uses in
sched.c - and the cases that use it outside the runqueue lock are
optimizations so they dont need an exact test.
Ingo
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Mon Jul 15 2002 - 22:00:17 EST