diff options
| author | Pekka Enberg <penberg@cs.helsinki.fi> | 2009-11-08 18:01:06 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-11-08 17:04:54 +0100 |
| commit | c10edee2e1716f8cf217cf52ed01ae4742fcdf3c (patch) | |
| tree | 30d894124621ba13ea5e7e06050b99953a401b62 /init/Kconfig | |
| parent | dd77038d233d106f297b907bf51459dfb1099eb1 (diff) | |
perf tools: Fix permission checks
The perf_event_open() system call returns EACCES if the user is
not root which results in a very confusing error message:
$ perf record -A -a -f
Error: perfcounter syscall returned with -1 (Permission denied)
Fatal: No CONFIG_PERF_EVENTS=y kernel support configured?
It turns out that's because perf tools are checking only for
EPERM. Fix that up to get a much better error message:
$ perf record -A -a -f
Fatal: Permission error - are you root?
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <1257696066-4046-1-git-send-email-penberg@cs.helsinki.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'init/Kconfig')
0 files changed, 0 insertions, 0 deletions