From: Peter Zijlstra peterz@infradead.org
[ Upstream commit ab6f824cfdf7363b5e529621cbc72ae6519c78d1 ]
Less is more; unify the two very nearly identical function.
Signed-off-by: Peter Zijlstra (Intel) peterz@infradead.org Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- kernel/events/core.c | 58 ++++++++++++++++---------------------------- 1 file changed, 21 insertions(+), 37 deletions(-)
diff --git a/kernel/events/core.c b/kernel/events/core.c index e453589da97ca..95860901949e7 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -1986,6 +1986,12 @@ static int perf_get_aux_event(struct perf_event *event, return 1; }
+static inline struct list_head *get_event_list(struct perf_event *event) +{ + struct perf_event_context *ctx = event->ctx; + return event->attr.pinned ? &ctx->pinned_active : &ctx->flexible_active; +} + static void perf_group_detach(struct perf_event *event) { struct perf_event *sibling, *tmp; @@ -2028,12 +2034,8 @@ static void perf_group_detach(struct perf_event *event) if (!RB_EMPTY_NODE(&event->group_node)) { add_event_to_groups(sibling, event->ctx);
- if (sibling->state == PERF_EVENT_STATE_ACTIVE) { - struct list_head *list = sibling->attr.pinned ? - &ctx->pinned_active : &ctx->flexible_active; - - list_add_tail(&sibling->active_list, list); - } + if (sibling->state == PERF_EVENT_STATE_ACTIVE) + list_add_tail(&sibling->active_list, get_event_list(sibling)); }
WARN_ON_ONCE(sibling->ctx != event->ctx); @@ -2350,6 +2352,8 @@ event_sched_in(struct perf_event *event, { int ret = 0;
+ WARN_ON_ONCE(event->ctx != ctx); + lockdep_assert_held(&ctx->lock);
if (event->state <= PERF_EVENT_STATE_OFF) @@ -3425,10 +3429,12 @@ struct sched_in_data { int can_add_hw; };
-static int pinned_sched_in(struct perf_event *event, void *data) +static int merge_sched_in(struct perf_event *event, void *data) { struct sched_in_data *sid = data;
+ WARN_ON_ONCE(event->ctx != sid->ctx); + if (event->state <= PERF_EVENT_STATE_OFF) return 0;
@@ -3437,37 +3443,15 @@ static int pinned_sched_in(struct perf_event *event, void *data)
if (group_can_go_on(event, sid->cpuctx, sid->can_add_hw)) { if (!group_sched_in(event, sid->cpuctx, sid->ctx)) - list_add_tail(&event->active_list, &sid->ctx->pinned_active); + list_add_tail(&event->active_list, get_event_list(event)); }
- /* - * If this pinned group hasn't been scheduled, - * put it in error state. - */ - if (event->state == PERF_EVENT_STATE_INACTIVE) - perf_event_set_state(event, PERF_EVENT_STATE_ERROR); - - return 0; -} - -static int flexible_sched_in(struct perf_event *event, void *data) -{ - struct sched_in_data *sid = data; - - if (event->state <= PERF_EVENT_STATE_OFF) - return 0; - - if (!event_filter_match(event)) - return 0; + if (event->state == PERF_EVENT_STATE_INACTIVE) { + if (event->attr.pinned) + perf_event_set_state(event, PERF_EVENT_STATE_ERROR);
- if (group_can_go_on(event, sid->cpuctx, sid->can_add_hw)) { - int ret = group_sched_in(event, sid->cpuctx, sid->ctx); - if (ret) { - sid->can_add_hw = 0; - sid->ctx->rotate_necessary = 1; - return 0; - } - list_add_tail(&event->active_list, &sid->ctx->flexible_active); + sid->can_add_hw = 0; + sid->ctx->rotate_necessary = 1; }
return 0; @@ -3485,7 +3469,7 @@ ctx_pinned_sched_in(struct perf_event_context *ctx,
visit_groups_merge(&ctx->pinned_groups, smp_processor_id(), - pinned_sched_in, &sid); + merge_sched_in, &sid); }
static void @@ -3500,7 +3484,7 @@ ctx_flexible_sched_in(struct perf_event_context *ctx,
visit_groups_merge(&ctx->flexible_groups, smp_processor_id(), - flexible_sched_in, &sid); + merge_sched_in, &sid); }
static void