@@ -217,13 +217,12 @@ static int pmu_aliases_parse(char *dir, struct list_head *head)
struct dirent *evt_ent;
DIR *event_dir;
size_t len;
- 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;
}
/*
This is a note to let you know that I have just added a patch titled perf tools: Dont stop PMU parsing on alias parse error to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree which can be found at: http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.16.y-queue This patch is scheduled to be released in version 3.16.7-ckt27. If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.16.y-ckt tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Luis ---8<------------------------------------------------------------ From b2e57e15903363d05fcdef8f0d0e421b67f34134 Mon Sep 17 00:00:00 2001 From: Andi Kleen <ak@linux.intel.com> Date: Wed, 17 Feb 2016 14:44:55 -0800 Subject: perf tools: Dont stop PMU parsing on alias parse error commit 940db6dcd3f4659303fdf6befe7416adc4d24118 upstream. 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> 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> [ luis: backported to 3.16: adjusted context ] Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- tools/perf/util/pmu.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-)