sched: Rework check_for_tasks()

1) Iterate thru all of threads in the system.
   Check for all threads, not only for group leaders.

2) Check for p->on_rq instead of p->state and cputime.
   Preempted task in !TASK_RUNNING state  OR just
   created task may be queued, that we want to be
   reported too.

3) Use read_lock() instead of write_lock().
   This function does not change any structures, and
   read_lock() is enough.

Signed-off-by: Kirill Tkhai <[email protected]>
Reviewed-by: Srikar Dronamraju <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Ben Segall <[email protected]>
Cc: Fabian Frederick <[email protected]>
Cc: Gautham R. Shenoy <[email protected]>
Cc: Konstantin Khorenko <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Michael wang <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Paul Gortmaker <[email protected]>
Cc: Paul Turner <[email protected]>
Cc: Rafael J. Wysocki <[email protected]>
Cc: Srivatsa S. Bhat <[email protected]>
Cc: Todd E Brandt <[email protected]>
Cc: Toshi Kani <[email protected]>
Signed-off-by: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/1403684395.3462.44.camel@tkhai
Signed-off-by: Ingo Molnar <[email protected]>

0 files changed, 0 insertions, 0 deletions