1 files changed, 24 insertions, 0 deletions

diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index ec635b7cc8ea..73d0cac8b67e 100644
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -427,6 +427,24 @@ static void get_debugfs_mntpt(void)
                 debugfs_mntpt[0] = '\0';
 }
 
+static void pthread__block_sigwinch(void)
+{
+        sigset_t set;
+
+        sigemptyset(&set);
+        sigaddset(&set, SIGWINCH);
+        pthread_sigmask(SIG_BLOCK, &set, NULL);
+}
+
+void pthread__unblock_sigwinch(void)
+{
+        sigset_t set;
+
+        sigemptyset(&set);
+        sigaddset(&set, SIGWINCH);
+        pthread_sigmask(SIG_UNBLOCK, &set, NULL);
+}
+
 int main(int argc, const char **argv)
 {
         const char *cmd;
@@ -480,6 +498,12 @@ int main(int argc, const char **argv)
          * time.
          */
         setup_path();
+        /*
+         * Block SIGWINCH notifications so that the thread that wants it can
+         * unblock and get syscalls like select interrupted instead of waiting
+         * forever while the signal goes to some other non interested thread.
+         */
+        pthread__block_sigwinch();
 
         while (1) {
                 static int done_help;