[PATCH] perf tools pt: Remove obsolete paragraph in intel-pt.c
From: Andi Kleen
Date: Tue Nov 08 2016 - 19:11:24 EST
From: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Since the unprivileged sched switch event was added in perf,
PT doesn't need need perf_event_paranoid=-1 anymore for
per cpu decoding. So remove the obsolete paragraph in
the documentation.
Cc: adrian.hunter@xxxxxxxxx
Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
---
tools/perf/Documentation/intel-pt.txt | 10 ----------
1 file changed, 10 deletions(-)
diff --git a/tools/perf/Documentation/intel-pt.txt b/tools/perf/Documentation/intel-pt.txt
index c6c8318e38a2..c7f817fd3611 100644
--- a/tools/perf/Documentation/intel-pt.txt
+++ b/tools/perf/Documentation/intel-pt.txt
@@ -550,16 +550,6 @@ Unless /proc/sys/kernel/perf_event_paranoid is set to -1, unprivileged users
have memory limits imposed upon them. That affects what buffer sizes they can
have as outlined above.
-Unless /proc/sys/kernel/perf_event_paranoid is set to -1, unprivileged users are
-not permitted to use tracepoints which means there is insufficient side-band
-information to decode Intel PT in per-cpu mode, and potentially workload-only
-mode too if the workload creates new processes.
-
-Note also, that to use tracepoints, read-access to debugfs is required. So if
-debugfs is not mounted or the user does not have read-access, it will again not
-be possible to decode Intel PT in per-cpu mode.
-
-
sched_switch tracepoint
-----------------------
--
2.5.5