* [PATCH] Adding an error message to indicate perf_event cgroup subsys not mounted.
@ 2013-03-21 18:29 Will Auld
0 siblings, 0 replies; only message in thread
From: Will Auld @ 2013-03-21 18:29 UTC (permalink / raw)
To: linux-kernel; +Cc: acme, eranian, andi.kleen, will.auld
Adding an error message to indicate that there is no mounted perf_event
cgroup while using -G or --cgroup options with perf.
Signed-off-by: Will Auld <will.auld@intel.com>
---
tools/perf/util/cgroup.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/tools/perf/util/cgroup.c b/tools/perf/util/cgroup.c
index 96bbda1..4126beb 100644
--- a/tools/perf/util/cgroup.c
+++ b/tools/perf/util/cgroup.c
@@ -44,8 +44,10 @@ cgroupfs_find_mountpoint(char *buf, size_t maxlen)
break;
}
fclose(fp);
- if (!found)
+ if (!found) {
+ error("No cgroup mounted with \'perf_event\' type");
return -1;
+ }
if (strlen(mountpoint) < maxlen) {
strcpy(buf, mountpoint);
--
1.7.1
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