[PATCH 10/33] sched: Make find_busiest_queue() a method
From: Ingo Molnar <mingo@kernel.org>
Date: 2012-11-22 22:51:04
Also in:
lkml
Subsystem:
scheduler, the rest · Maintainers:
Ingo Molnar, Peter Zijlstra, Juri Lelli, Vincent Guittot, Linus Torvalds
From: Peter Zijlstra <redacted> Its a bit awkward but it was the least painful means of modifying the queue selection. Used in a later patch to conditionally use a random queue. Signed-off-by: Peter Zijlstra <redacted> Cc: Paul Turner <redacted> Cc: Lee Schermerhorn <redacted> Cc: Christoph Lameter <redacted> Cc: Rik van Riel <redacted> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Hugh Dickins <hughd@google.com> Link: http://lkml.kernel.org/n/tip-lfpez319yryvdhwqfqrh99f2@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org> --- kernel/sched/fair.c | 20 ++++++++++++-------- 1 file changed, 12 insertions(+), 8 deletions(-)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 59e072b..511fbb8 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c@@ -3600,6 +3600,9 @@ struct lb_env { unsigned int loop; unsigned int loop_break; unsigned int loop_max; + + struct rq * (*find_busiest_queue)(struct lb_env *, + struct sched_group *); }; /*
@@ -4779,13 +4782,14 @@ static int load_balance(int this_cpu, struct rq *this_rq, struct cpumask *cpus = __get_cpu_var(load_balance_tmpmask); struct lb_env env = { - .sd = sd, - .dst_cpu = this_cpu, - .dst_rq = this_rq, - .dst_grpmask = sched_group_cpus(sd->groups), - .idle = idle, - .loop_break = sched_nr_migrate_break, - .cpus = cpus, + .sd = sd, + .dst_cpu = this_cpu, + .dst_rq = this_rq, + .dst_grpmask = sched_group_cpus(sd->groups), + .idle = idle, + .loop_break = sched_nr_migrate_break, + .cpus = cpus, + .find_busiest_queue = find_busiest_queue, }; cpumask_copy(cpus, cpu_active_mask);
@@ -4804,7 +4808,7 @@ redo: goto out_balanced; } - busiest = find_busiest_queue(&env, group); + busiest = env.find_busiest_queue(&env, group); if (!busiest) { schedstat_inc(sd, lb_nobusyq[idle]); goto out_balanced;
--
1.7.11.7
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