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| author | Ingo Molnar <mingo@elte.hu> | 2007-10-15 17:00:04 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2007-10-15 17:00:04 +0200 |
| commit | 6cb58195143b55d4c427d92f8425bec2b0d9c56c (patch) | |
| tree | 80727312684fe2be27c2c6202a42fff1915f9599 /kernel/sched.c | |
| parent | bf5c91ba8c629b84413c761f529627195fd0a935 (diff) | |
| download | lwn-6cb58195143b55d4c427d92f8425bec2b0d9c56c.tar.gz lwn-6cb58195143b55d4c427d92f8425bec2b0d9c56c.zip | |
sched: optimize vruntime based scheduling
optimize vruntime based scheduling.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Mike Galbraith <efault@gmx.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/sched.c')
| -rw-r--r-- | kernel/sched.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index a5dd03522e32..5594e65166fc 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -732,13 +732,14 @@ calc_delta_fair(unsigned long delta_exec, struct load_weight *lw) static inline void update_load_add(struct load_weight *lw, unsigned long inc) { lw->weight += inc; - lw->inv_weight = WMULT_CONST / lw->weight; + if (sched_feat(FAIR_SLEEPERS)) + lw->inv_weight = WMULT_CONST / lw->weight; } static inline void update_load_sub(struct load_weight *lw, unsigned long dec) { lw->weight -= dec; - if (likely(lw->weight)) + if (sched_feat(FAIR_SLEEPERS) && likely(lw->weight)) lw->inv_weight = WMULT_CONST / lw->weight; } |