From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AB8JxZqxWYIfE9SQxCRADgCmDqM10/jibap6Kxydz6mbyP/txv/QC7GP96io6NJvIH6vHkO/pCXo ARC-Seal: i=1; a=rsa-sha256; t=1524814896; cv=none; d=google.com; s=arc-20160816; b=iPEaLzMLGcSPNjygm6JFW/rNYcNY8GNrMCXC/GJEsPyqBG7bq8xMilN8c//JEvNNPe JRji3p/SLoiVzWCT9fKOf6wB4ZkgDg2feRCh0M6bHeEi8V36pZvdHldPJE3uMCWwUSG3 mP/fiQChfaHIrPR1jssOI2FqkSzBSN5Fg7MPzpbHHyG5djr0cS/oOrNXLqp87Qu25HB0 ZLlKzsOPYszEfsa5FTPdbnZKZtyWrdX7KqB7dcCiQsGH5lwTGOOJeBhAxG+AYhAPhRX4 V/A+NWGWo64WCFeWAZYHgIgGvpwX5NDpt4+EZdBk/mSuUwS6X54MgxSUs3GYm5Rn04k4 CFHQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date:arc-authentication-results; bh=HHXeaiIXJXA7r1mvQKucQGHM76KnkvR5mGfX4Yq4y+A=; b=S9kcjkTYmoAwhEKFCIoS6PM+hR1M7nr6f0D/CGhwn0QXFyvXrjgCJDj+kY6zG+SnFa GXLinaTlq5VoXF29S3//4Hir/lah9CXRzEKcTqKuq7dj/DfTuNR0+jS08C1OIvsbekBp a/o47P3HWC3vnMmobuDBrtaGefQmyOoEyPB0C3ekkMEa0OjyrvRGioSp8sgA1gfV1So2 uI0WeKT0FpJ/7AtkTcSAZyI51zCbW21MDdLiyxlEaQMDyvaYdBlX/90OZuBK5QoJgTIR NmTG2dbEFxxcVqfQNFW/NixRZlwbBenekw9yod4J3q/zyrLNeW//JKIvIRRYUuu3/8Qv KECw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kselftest-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kselftest-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=redhat.com Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kselftest-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kselftest-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757499AbeD0Hlg (ORCPT ); Fri, 27 Apr 2018 03:41:36 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:54694 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1757444AbeD0Hlf (ORCPT ); Fri, 27 Apr 2018 03:41:35 -0400 Date: Fri, 27 Apr 2018 09:41:30 +0200 From: Miroslav Lichvar To: Jeffrin Thalakkottoor Cc: Thomas Gleixner , shuah@kernel.org, Kees Cook , anton@enomsg.org, ccross@android.com, Tony Luck , John Stultz , sboyd@kernel.org, linux-kselftest@vger.kernel.org, LKML Subject: Re: possible BUG: selftest about raw_skew failed Message-ID: <20180427074130.GN20050@localhost> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.1 (2017-09-22) Sender: linux-kselftest-owner@vger.kernel.org X-Mailing-List: linux-kselftest@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1598367547498408284?= X-GMAIL-MSGID: =?utf-8?q?1598884305381030319?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On Thu, Apr 26, 2018 at 11:28:29PM +0200, Thomas Gleixner wrote: > On Sat, 21 Apr 2018, Jeffrin Thalakkottoor wrote: > > selftests: raw_skew > > ======================================== > > WARNING: ADJ_OFFSET in progress, this will cause inaccurate results > > Estimating clock drift: 17.910(est) 16.820(act) [FAILED] Was ntpd, systemd-timesyncd, or some other NTP/PTP daemon running shortly before or during the test? The warning indicates that the clock was slewed by adjtime() or adjtimex(), which makes the measurement of the frequency less accurate and the test may fail. Maybe this test and other tests that measure the frequency of the system clock should be modified to SKIP when adjtimex() returns a non-zero offset (or the frequency changes during the test)? -- Miroslav Lichvar