perf record: Fix mmap error output condition
authorJiri Olsa <jolsa@redhat.com>
Sat, 20 Oct 2012 14:33:19 +0000 (16:33 +0200)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Mon, 29 Oct 2012 14:14:59 +0000 (12:14 -0200)
commit0089fa9831f3752869143c7928adb94ac6353085
treef13e551a5b5856a5a1cc97853d631abb9b09857e
parente84ba4e26833991d1c1c15a592b1474ee2b6dfdb
perf record: Fix mmap error output condition

The mmap_pages default value is not power of 2 (UINT_MAX).

Together with perf_evlist__mmap function returning error value different
from EPERM, we get misleading error message: "--mmap_pages/-m value must
be a power of two."

Fixing this by adding extra check for UINT_MAX value for this error
condition.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1350743599-4805-12-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/perf/builtin-record.c