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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-06-18 22:20:52 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-06-19 13:42:34 +0200 |
| commit | f9188e023c248d73f5b4a589b480e065c1864068 (patch) | |
| tree | 86efe8c89c318fdf9b9db8471680ba225ec8f4e2 /kernel/notifier.c | |
| parent | b8e6d829729d1a5991a9f628205b671cac2ec06f (diff) | |
perf_counter: Make callchain samples extensible
Before exposing upstream tools to a callchain-samples ABI, tidy it
up to make it more extensible in the future:
Use markers in the IP chain to denote context, use (u64)-1..-4095 range
for these context markers because we use them for ERR_PTR(), so these
addresses are unlikely to be mapped.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/notifier.c')
0 files changed, 0 insertions, 0 deletions