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| author | Gregory Haskins <ghaskins@novell.com> | 2008-12-29 09:39:49 -0500 |
|---|---|---|
| committer | Gregory Haskins <ghaskins@novell.com> | 2008-12-29 09:39:49 -0500 |
| commit | e864c499d9e57805ae1f9e7ea404dd223759cd53 (patch) | |
| tree | 26dcc691f414c2d0eee026ea0f4d9e0d9e0475a2 /kernel/sched.c | |
| parent | 4d9842776a23e52ec4c60e0a79f5e1bbe91e463e (diff) | |
| download | lwn-e864c499d9e57805ae1f9e7ea404dd223759cd53.tar.gz lwn-e864c499d9e57805ae1f9e7ea404dd223759cd53.zip | |
sched: track the next-highest priority on each runqueue
We will use this later in the series to reduce the amount of rq-lock
contention during a pull operation
Signed-off-by: Gregory Haskins <ghaskins@novell.com>
Diffstat (limited to 'kernel/sched.c')
| -rw-r--r-- | kernel/sched.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index 756d981d91a4..7729f9a45a8b 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -463,7 +463,10 @@ struct rt_rq { struct rt_prio_array active; unsigned long rt_nr_running; #if defined CONFIG_SMP || defined CONFIG_RT_GROUP_SCHED - int highest_prio; /* highest queued rt task prio */ + struct { + int curr; /* highest queued rt task prio */ + int next; /* next highest */ + } highest_prio; #endif #ifdef CONFIG_SMP unsigned long rt_nr_migratory; @@ -8169,7 +8172,8 @@ static void init_rt_rq(struct rt_rq *rt_rq, struct rq *rq) __set_bit(MAX_RT_PRIO, array->bitmap); #if defined CONFIG_SMP || defined CONFIG_RT_GROUP_SCHED - rt_rq->highest_prio = MAX_RT_PRIO; + rt_rq->highest_prio.curr = MAX_RT_PRIO; + rt_rq->highest_prio.next = MAX_RT_PRIO; #endif #ifdef CONFIG_SMP rt_rq->rt_nr_migratory = 0; |