diff options
Diffstat (limited to 'meta-eas/recipes-kernel/linux/linux-renesas/0011-sched-fair-Propagate-asynchrous-detach.patch')
| -rw-r--r-- | meta-eas/recipes-kernel/linux/linux-renesas/0011-sched-fair-Propagate-asynchrous-detach.patch | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/meta-eas/recipes-kernel/linux/linux-renesas/0011-sched-fair-Propagate-asynchrous-detach.patch b/meta-eas/recipes-kernel/linux/linux-renesas/0011-sched-fair-Propagate-asynchrous-detach.patch new file mode 100644 index 0000000..3d7412a --- /dev/null +++ b/meta-eas/recipes-kernel/linux/linux-renesas/0011-sched-fair-Propagate-asynchrous-detach.patch @@ -0,0 +1,72 @@ +From 02927c812e8cd4ebd635e567ccd935d9e87075b8 Mon Sep 17 00:00:00 2001 +From: Vincent Guittot <vincent.guittot@linaro.org> +Date: Tue, 8 Nov 2016 10:53:46 +0100 +Subject: [PATCH 11/92] sched/fair: Propagate asynchrous detach + +A task can be asynchronously detached from cfs_rq when migrating +between CPUs. The load of the migrated task is then removed from +source cfs_rq during its next update. We use this event to set +propagation flag. + +During the load balance, we take advantage of the update of blocked +load to propagate any pending changes. + +The propagation relies on patch: + + "sched: Fix hierarchical order in rq->leaf_cfs_rq_list" + +... which orders children and parents, to ensure that it's done in one pass. + +Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org> +Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> +Acked-by: Dietmar Eggemann <dietmar.eggemann@arm.com> +Cc: Linus Torvalds <torvalds@linux-foundation.org> +Cc: Morten.Rasmussen@arm.com +Cc: Peter Zijlstra <peterz@infradead.org> +Cc: Thomas Gleixner <tglx@linutronix.de> +Cc: bsegall@google.com +Cc: kernellwp@gmail.com +Cc: pjt@google.com +Cc: yuyang.du@intel.com +Link: http://lkml.kernel.org/r/1478598827-32372-6-git-send-email-vincent.guittot@linaro.org +Signed-off-by: Ingo Molnar <mingo@kernel.org> +(cherry picked from commit 4e5160766fcc9f41bbd38bac11f92dce993644aa) +Signed-off-by: Gaku Inami <gaku.inami.xw@bp.renesas.com> +--- + kernel/sched/fair.c | 6 ++++++ + 1 file changed, 6 insertions(+) + +diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c +index 8cf26fd..090a9bb 100644 +--- a/kernel/sched/fair.c ++++ b/kernel/sched/fair.c +@@ -3219,6 +3219,7 @@ static inline void cfs_rq_util_change(struct cfs_rq *cfs_rq) + sub_positive(&sa->load_avg, r); + sub_positive(&sa->load_sum, r * LOAD_AVG_MAX); + removed_load = 1; ++ set_tg_cfs_propagate(cfs_rq); + } + + if (atomic_long_read(&cfs_rq->removed_util_avg)) { +@@ -3226,6 +3227,7 @@ static inline void cfs_rq_util_change(struct cfs_rq *cfs_rq) + sub_positive(&sa->util_avg, r); + sub_positive(&sa->util_sum, r * LOAD_AVG_MAX); + removed_util = 1; ++ set_tg_cfs_propagate(cfs_rq); + } + + decayed = __update_load_avg(now, cpu_of(rq_of(cfs_rq)), sa, +@@ -6872,6 +6874,10 @@ static void update_blocked_averages(int cpu) + + if (update_cfs_rq_load_avg(cfs_rq_clock_task(cfs_rq), cfs_rq, true)) + update_tg_load_avg(cfs_rq, 0); ++ ++ /* Propagate pending load changes to the parent */ ++ if (cfs_rq->tg->se[cpu]) ++ update_load_avg(cfs_rq->tg->se[cpu], 0); + } + raw_spin_unlock_irqrestore(&rq->lock, flags); + } +-- +1.9.1 + |