Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932644AbbEHSi2 (ORCPT ); Fri, 8 May 2015 14:38:28 -0400 Received: from smtp2.provo.novell.com ([137.65.250.81]:57150 "EHLO smtp2.provo.novell.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932209AbbEHSiZ (ORCPT ); Fri, 8 May 2015 14:38:25 -0400 From: Davidlohr Bueso To: Arnaldo Carvalho de Melo , Ingo Molnar Cc: linux-kernel@vger.kernel.org, dave@stgolabs.net, Davidlohr Bueso Subject: [PATCH 2/2] perf bench futex: Handle spurious wakeups Date: Fri, 8 May 2015 11:38:00 -0700 Message-Id: <1431110280-20231-2-git-send-email-dave@stgolabs.net> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1431110280-20231-1-git-send-email-dave@stgolabs.net> References: <1431110280-20231-1-git-send-email-dave@stgolabs.net> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1059 Lines: 35 Wrap futex_wait around a loop and catch for EINTR. Either a spurious wakeup occurred or a signal interrupted is, either way we need to block again. Signed-off-by: Davidlohr Bueso --- tools/perf/bench/futex-wake.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/tools/perf/bench/futex-wake.c b/tools/perf/bench/futex-wake.c index 929f762..e5e41d3 100644 --- a/tools/perf/bench/futex-wake.c +++ b/tools/perf/bench/futex-wake.c @@ -60,7 +60,12 @@ static void *workerfn(void *arg __maybe_unused) pthread_cond_wait(&thread_worker, &thread_lock); pthread_mutex_unlock(&thread_lock); - futex_wait(&futex1, 0, NULL, futex_flag); + while (1) { + if (futex_wait(&futex1, 0, NULL, futex_flag) != EINTR) + break; + } + + pthread_exit(NULL); return NULL; } -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/