There is a possibility that because of task of a group moving from one cpu to another, it may gain more cpu time that desired. See http://marc.info/?l=linux-kernel&m=119073197730334 for details.
This is an attempt to fix that problem. Basically it simulates dequeue of higher level entities as if they are going to sleep. Similarly it simulate wakeup of higher level entities as if they are waking up from sleep. Signed-off-by : Srivatsa Vaddagiri <[EMAIL PROTECTED]> --- kernel/sched_fair.c | 2 ++ 1 files changed, 2 insertions(+) Index: current/kernel/sched_fair.c =================================================================== --- current.orig/kernel/sched_fair.c +++ current/kernel/sched_fair.c @@ -715,6 +715,7 @@ static void enqueue_task_fair(struct rq break; cfs_rq = cfs_rq_of(se); enqueue_entity(cfs_rq, se, wakeup); + wakeup = 1; } } @@ -734,6 +735,7 @@ static void dequeue_task_fair(struct rq /* Don't dequeue parent if it has other entities besides us */ if (cfs_rq->load.weight) break; + sleep = 1; } } -- Regards, vatsa - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/