Messages in this thread Patch in this message | | | Date | Fri, 27 Jun 2008 13:41:24 +0200 | From | Peter Zijlstra <> | Subject | [PATCH 15/30] sched: fix newidle smp group balancing |
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Re-compute the shares on newidle - so we can make a decision based on recent data.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> --- kernel/sched.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)
Index: linux-2.6/kernel/sched.c =================================================================== --- linux-2.6.orig/kernel/sched.c +++ linux-2.6/kernel/sched.c @@ -1579,6 +1579,13 @@ static void update_shares(struct sched_d walk_tg_tree(tg_nop, tg_shares_up, 0, sd); } +static void update_shares_locked(struct rq *rq, struct sched_domain *sd) +{ + spin_unlock(&rq->lock); + update_shares(sd); + spin_lock(&rq->lock); +} + static void update_h_load(int cpu) { walk_tg_tree(tg_load_down, tg_nop, cpu, NULL); @@ -1595,6 +1602,10 @@ static inline void update_shares(struct { } +static inline void update_shares_locked(struct rq *rq, struct sched_domain *sd) +{ +} + #endif #endif @@ -3543,6 +3554,7 @@ load_balance_newidle(int this_cpu, struc schedstat_inc(sd, lb_count[CPU_NEWLY_IDLE]); redo: + update_shares_locked(this_rq, sd); group = find_busiest_group(sd, this_cpu, &imbalance, CPU_NEWLY_IDLE, &sd_idle, cpus, NULL); if (!group) { @@ -3586,6 +3598,7 @@ redo: } else sd->nr_balance_failed = 0; + update_shares_locked(this_rq, sd); return ld_moved; out_balanced: --
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