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authorPeter Zijlstra <peterz@infradead.org>2013-09-13 13:14:47 +0200
committerIngo Molnar <mingo@kernel.org>2013-11-19 16:57:42 +0100
commit06db0b21712f878b808480ef31097637013bbf0f (patch)
tree572c8d97ef964d3e0023626e246fc6ee775b4aa2 /kernel/events
parentd5b5f391d434c5cc8bcb1ab2d759738797b85f52 (diff)
downloadlinux-06db0b21712f878b808480ef31097637013bbf0f.tar.bz2
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@infradead.org> Link: http://lkml.kernel.org/r/20130913111447.GN31370@twins.programming.kicks-ass.net Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/events')
-rw-r--r--kernel/events/core.c8
1 files changed, 0 insertions, 8 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c
index d724e7757cd1..72348dc192c1 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);