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| author | Peter Zijlstra | 2009-03-23 18:22:07 +0100 |
|---|---|---|
| committer | Ingo Molnar | 2009-04-06 09:30:25 +0200 |
| commit | 96f6d4444302bb2ea2cf409529eef816462f6ce0 (patch) | |
| tree | 34ae6944b4a8e6db89c50dba5a3a8b9da3315122 /include/linux/perf_counter.h | |
| parent | perf_counter: remove the event config bitfields (diff) | |
| download | kernel-qcow2-linux-96f6d4444302bb2ea2cf409529eef816462f6ce0.tar.gz kernel-qcow2-linux-96f6d4444302bb2ea2cf409529eef816462f6ce0.tar.xz kernel-qcow2-linux-96f6d4444302bb2ea2cf409529eef816462f6ce0.zip | |
perf_counter: avoid recursion
Tracepoint events like lock_acquire and software counters like
pagefaults can recurse into the perf counter code again, avoid that.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Orig-LKML-Reference: <20090323172417.152096433@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/perf_counter.h')
| -rw-r--r-- | include/linux/perf_counter.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h index 56099e52970d..18dc17d0a61c 100644 --- a/include/linux/perf_counter.h +++ b/include/linux/perf_counter.h @@ -328,6 +328,13 @@ struct perf_cpu_context { int active_oncpu; int max_pertask; int exclusive; + + /* + * Recursion avoidance: + * + * task, softirq, irq, nmi context + */ + int recursion[4]; }; /* |