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| author | Mike Galbraith <efault@gmx.de> | 2009-01-02 12:16:42 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-01-02 17:10:43 +0100 |
| commit | 0a582440ff546e2c6610d1acec325e91b4efd313 (patch) | |
| tree | 161a0943091c53bb2154121480b3e26ce5df1769 /kernel | |
| parent | b58602a4bac012b5f4fc12fe6b46ab237b610d5d (diff) | |
| download | linux-stable-0a582440ff546e2c6610d1acec325e91b4efd313.tar.gz linux-stable-0a582440ff546e2c6610d1acec325e91b4efd313.tar.bz2 linux-stable-0a582440ff546e2c6610d1acec325e91b4efd313.zip | |
sched: fix sched_slice()
Impact: fix bad-interactivity buglet
Fix sched_slice() to emit a sane result whether a task is currently
enqueued or not.
Signed-off-by: Mike Galbraith <efault@gmx.de>
Tested-by: Jayson King <dev@jaysonking.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
kernel/sched_fair.c | 30 ++++++++++++------------------
1 file changed, 12 insertions(+), 18 deletions(-)
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched_fair.c | 30 |
1 files changed, 12 insertions, 18 deletions
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index 5ad4440f0fc4..b808563f4f19 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -386,20 +386,6 @@ int sched_nr_latency_handler(struct ctl_table *table, int write, #endif /* - * delta *= P[w / rw] - */ -static inline unsigned long -calc_delta_weight(unsigned long delta, struct sched_entity *se) -{ - for_each_sched_entity(se) { - delta = calc_delta_mine(delta, - se->load.weight, &cfs_rq_of(se)->load); - } - - return delta; -} - -/* * delta /= w */ static inline unsigned long @@ -440,12 +426,20 @@ static u64 __sched_period(unsigned long nr_running) */ static u64 sched_slice(struct cfs_rq *cfs_rq, struct sched_entity *se) { - unsigned long nr_running = cfs_rq->nr_running; + u64 slice = __sched_period(cfs_rq->nr_running + !se->on_rq); - if (unlikely(!se->on_rq)) - nr_running++; + for_each_sched_entity(se) { + struct load_weight *load = &cfs_rq->load; - return calc_delta_weight(__sched_period(nr_running), se); + if (unlikely(!se->on_rq)) { + struct load_weight lw = cfs_rq->load; + + update_load_add(&lw, se->load.weight); + load = &lw; + } + slice = calc_delta_mine(slice, se->load.weight, load); + } + return slice; } /* |