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Subject[PATCH 06/11] perf kvm: limit repetitive guestmount message to once per directory
Date
After 7ed97ad use of the guestmount option without a subdir for *each*
VM generates an error message for each sample related to that VM. Once
per VM is enough.

Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
---
tools/perf/util/map.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index 16d783d..cc33486 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -8,6 +8,7 @@
#include <unistd.h>
#include "map.h"
#include "thread.h"
+#include "strlist.h"

const char *map_type__name[MAP__NR_TYPES] = {
[MAP__FUNCTION] = "Functions",
@@ -695,7 +696,15 @@ struct machine *machines__findnew(struct rb_root *self, pid_t pid)
(symbol_conf.guestmount)) {
sprintf(path, "%s/%d", symbol_conf.guestmount, pid);
if (access(path, R_OK)) {
- pr_err("Can't access file %s\n", path);
+ static struct strlist *seen;
+
+ if (!seen)
+ seen = strlist__new(true, NULL);
+
+ if (!strlist__has_entry(seen, path)) {
+ pr_err("Can't access file %s\n", path);
+ strlist__add(seen, path);
+ }
machine = NULL;
goto out;
}
--
1.7.10.1


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