When an event is migrated, move the event per-cpu
accounting accordingly so that branch stack and cgroup
events work correctly on the new CPU.
Original-patch-by: Peter Zijlstra <pet...@infradead.org>
Signed-off-by: Frederic Weisbecker <fweis...@gmail.com>
Cc: Jiri Olsa <jo...@redhat.com>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: Namhyung Kim <namhy...@kernel.org>
Cc: Ingo Molnar <mi...@kernel.org>
Cc: Arnaldo Carvalho de Melo <a...@redhat.com>
Cc: Stephane Eranian <eran...@google.com>
---
kernel/events/core.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/kernel/events/core.c b/kernel/events/core.c
index fd820a4..b40c3db 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -7144,6 +7144,7 @@ void perf_pmu_migrate_context(struct pmu *pmu, int
src_cpu, int dst_cpu)
list_for_each_entry_safe(event, tmp, &src_ctx->event_list,
event_entry) {
perf_remove_from_context(event);
+ unaccount_event_cpu(event, src_cpu);
put_ctx(src_ctx);
list_add(&event->event_entry, &events);
}
@@ -7156,6 +7157,7 @@ void perf_pmu_migrate_context(struct pmu *pmu, int
src_cpu, int dst_cpu)
list_del(&event->event_entry);
if (event->state >= PERF_EVENT_STATE_OFF)
event->state = PERF_EVENT_STATE_INACTIVE;
+ account_event_cpu(event, dst_cpu);
perf_install_in_context(dst_ctx, event, dst_cpu);
get_ctx(dst_ctx);
}
--
1.7.5.4
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