diff options
| author | Frederic Weisbecker <fweisbec@gmail.com> | 2009-12-31 05:53:02 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-12-31 13:11:31 +0100 |
| commit | 48b5ba9cc98d676712da29d9931f1c88e5185ff2 (patch) | |
| tree | 6961114f04455c1da1d32212d6258bc75f362bfd /kernel/perf_event.c | |
| parent | 4efb5290ae187514bd31af8c2d7755e175245e19 (diff) | |
perf: Pass appropriate frame pointer to dump_trace()
Pass the frame pointer from the regs of the interrupted path
to dump_trace() while processing the stack trace.
Currently, dump_trace() takes the current bp and starts the
callchain from dump_trace() itself. This is wasteful because
we need to walk through the entire NMI/DEBUG stack before
retrieving the interrupted point.
We can fix that by just using the frame pointer from the
captured regs. It points exactly where we want to start.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1262235183-5320-1-git-send-regression-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'kernel/perf_event.c')
0 files changed, 0 insertions, 0 deletions