diff options
| author | Paul Mackerras | 2010-05-08 20:58:00 +1000 |
|---|---|---|
| committer | Ingo Molnar | 2010-05-08 13:16:55 +0200 |
| commit | 6e85158cf5a2385264316870256fb6ad681156a0 (patch) | |
| tree | 39d5a0c81c4cc54c8051a9f62b587f17b0a2077a /kernel | |
| parent | ed82702155b6343727ee732f7eae6d72e8b453fe (diff) | |
perf_event: Make software events work again
Commit 6bde9b6ce0127e2a56228a2071536d422be31336 ("perf: Add
group scheduling transactional APIs") added code to allow a
group to be scheduled in a single transaction. However, it
introduced a bug in handling events whose pmu does not implement
transactions -- at the end of scheduling in the events in the
group, in the non-transactional case the code now falls through
to the group_error label, and proceeds to unschedule all the
events in the group and return failure.
This fixes it by returning 0 (success) in the non-transactional
case.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Lin Ming <ming.m.lin@intel.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: eranian@gmail.com
LKML-Reference: <20100508105800.GB10650@brick.ozlabs.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/perf_event.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/kernel/perf_event.c b/kernel/perf_event.c index bb06382f98e7..180151ff8376 100644 --- a/kernel/perf_event.c +++ b/kernel/perf_event.c @@ -664,13 +664,13 @@ group_sched_in(struct perf_event *group_event, } } - if (txn) { - ret = pmu->commit_txn(pmu); - if (!ret) { - pmu->cancel_txn(pmu); + if (!txn) + return 0; - return 0; - } + ret = pmu->commit_txn(pmu); + if (!ret) { + pmu->cancel_txn(pmu); + return 0; } group_error: |