Commit-ID: 06db0b21712f878b808480ef31097637013bbf0f
Gitweb: http://git.kernel.org/tip/06db0b21712f878b808480ef31097637013bbf0f
Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
AuthorDate: Fri, 13 Sep 2013 13:14:47 +0200
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Tue, 19 Nov 2013 16:57:42 +0100
perf: Remove fragile swevent hlist optimization
Currently we only allocate a single cpu hashtable for per-cpu
swevents; do away with this optimization for it is fragile in the face
of things like perf_pmu_migrate_context().
The easiest thing is to make sure all CPUs are consistent wrt state.
Signed-off-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/20130913111447.GN31370@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
kernel/events/core.c | 8 --------
1 file changed, 8 deletions(-)
diff --git a/kernel/events/core.c b/kernel/events/core.c
index d724e77..72348dc 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -5680,11 +5680,6 @@ static void swevent_hlist_put(struct perf_event *event)
{
int cpu;
- if (event->cpu != -1) {
- swevent_hlist_put_cpu(event, event->cpu);
- return;
- }
-
for_each_possible_cpu(cpu)
swevent_hlist_put_cpu(event, cpu);
}
@@ -5718,9 +5713,6 @@ static int swevent_hlist_get(struct perf_event *event)
int err;
int cpu, failed_cpu;
- if (event->cpu != -1)
- return swevent_hlist_get_cpu(event, event->cpu);
-
get_online_cpus();
for_each_possible_cpu(cpu) {
err = swevent_hlist_get_cpu(event, cpu);
--
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