From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on gnuweeb.org X-Spam-Level: X-Spam-Status: No, score=-5.1 required=5.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_HI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 Authentication-Results: gnuweeb.org; dmarc=pass (p=none dis=none) header.from=kernel.org Authentication-Results: gnuweeb.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=jqPbOGEx; dkim-atps=neutral Received-SPF: Pass (mailfrom) identity=mailfrom; client-ip=139.178.84.217; helo=dfw.source.kernel.org; envelope-from=srs0=rfi9=ca=paulmck-thinkpad-p17-gen-1.home=paulmck@kernel.org; receiver= Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by gnuweeb.org (Postfix) with ESMTPS id D28D2249B38 for ; Tue, 13 Jun 2023 03:45:24 +0700 (WIB) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 5FCD362EDE; Mon, 12 Jun 2023 20:45:17 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2E690C43323; Mon, 12 Jun 2023 20:45:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1686602717; bh=YSnDd8eIZWAVVkXrAR2iFLMVAjImLZBexFy3GV2smU4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jqPbOGExUPnvOck2RN1WO9wxecIiO7nVEipYAmWrLM6powvhfty5dd2arfDL8o8MK +rnU6nV/FKY19zKCzDsWkSXE6UYVNpsn6S7qpgOF8tmC2zYLG1iainbN3FyMQm2+GQ swvICHPmRQp/6/PWmXyRORqLAO/z97YwdosPE6+0ippOcXn3wfmL/2RniVpZurM0Yk GUzVjbI/A5s6waLiD7OXvNYdy8Fdh9dSRtJSyaqU5Q7pVkFfB03vmEETUyG8GzYxEK 3pC5b7u8lReTcOx2+b0rqrvkoFUDwip9ZwcxnDGnC9eWQYQq8O5dvmejxGTmVW5X6I meIOnIg89Zmrw== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id 0423DCE3A7E; Mon, 12 Jun 2023 13:45:16 -0700 (PDT) From: "Paul E. McKenney" To: linux-kernel@vger.kernel.org Cc: gwml@vger.gnuweeb.org, kernel-team@meta.com, w@lwt.eu, =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= , Willy Tarreau , "Paul E . McKenney" Subject: [PATCH v2 nolibc 35/53] selftests/nolibc: prevent coredumps during test execution Date: Mon, 12 Jun 2023 13:44:56 -0700 Message-Id: <20230612204514.292087-35-paulmck@kernel.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <8b757cc0-3719-4e63-a755-9710384137bc@paulmck-laptop> References: <8b757cc0-3719-4e63-a755-9710384137bc@paulmck-laptop> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit List-Id: From: Thomas Weißschuh The child process forked during stackprotector tests intentionally gets killed with SIGABRT. By default this will trigger writing a coredump. The writing of the coredump can spam the systems coredump machinery and take some time. Timings for the full run of nolibc-test: Before: 200ms After: 20ms This is on a desktop x86 system with systemd-coredumpd enabled. Signed-off-by: Thomas Weißschuh Signed-off-by: Willy Tarreau Signed-off-by: Paul E. McKenney --- tools/testing/selftests/nolibc/nolibc-test.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c index 6db788603a34..84a1b02eb6f9 100644 --- a/tools/testing/selftests/nolibc/nolibc-test.c +++ b/tools/testing/selftests/nolibc/nolibc-test.c @@ -831,6 +831,7 @@ static int run_protection(int min, int max) close(STDOUT_FILENO); close(STDERR_FILENO); + prctl(PR_SET_DUMPABLE, 0, 0, 0, 0); smash_stack(); return 1; -- 2.40.1