diff options
| author | Andi Kleen <ak@linux.intel.com> | 2016-02-17 14:44:55 -0800 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2016-04-18 08:49:17 -0400 |
| commit | e05bb3ae6eab46c0846a56ce71bdad34d7048adb (patch) | |
| tree | 992afaacda3b0ef08ea587a18afa26ddd3505c99 /tools | |
| parent | d3b9f52c79ea65d9256e7a49a1c9c259bae2bd68 (diff) | |
perf tools: Dont stop PMU parsing on alias parse error
[ Upstream commit 940db6dcd3f4659303fdf6befe7416adc4d24118 ]
When an error happens during alias parsing currently the complete
parsing of all attributes of the PMU is stopped. This is breaks old perf
on a newer kernel that may have not-yet-know alias attributes (such as
.scale or .per-pkg).
Continue when some attribute is unparseable.
This is IMHO a stable candidate and should be backported to older
versions to avoid problems with newer kernels.
v2: Print warnings when something goes wrong.
v3: Change warning to debug output
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: stable@vger.kernel.org # v3.6+
Link: http://lkml.kernel.org/r/1455749095-18358-1-git-send-email-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/util/pmu.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c index e243ad962a4d..bc7ca4ffcd2d 100644 --- a/tools/perf/util/pmu.c +++ b/tools/perf/util/pmu.c @@ -221,13 +221,12 @@ static int pmu_aliases_parse(char *dir, struct list_head *head) { struct dirent *evt_ent; DIR *event_dir; - int ret = 0; event_dir = opendir(dir); if (!event_dir) return -EINVAL; - while (!ret && (evt_ent = readdir(event_dir))) { + while ((evt_ent = readdir(event_dir))) { char path[PATH_MAX]; char *name = evt_ent->d_name; FILE *file; @@ -243,17 +242,19 @@ static int pmu_aliases_parse(char *dir, struct list_head *head) snprintf(path, PATH_MAX, "%s/%s", dir, name); - ret = -EINVAL; file = fopen(path, "r"); - if (!file) - break; + if (!file) { + pr_debug("Cannot open %s\n", path); + continue; + } - ret = perf_pmu__new_alias(head, dir, name, file); + if (perf_pmu__new_alias(head, dir, name, file) < 0) + pr_debug("Cannot set up %s\n", name); fclose(file); } closedir(event_dir); - return ret; + return 0; } /* |