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[2620:137:e000::1:20]) by mx.google.com with ESMTP id s11-20020a632c0b000000b00543d32f92ecsi1914376pgs.472.2023.06.06.06.22.41; Tue, 06 Jun 2023 06:22:53 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20221208 header.b=PCXN8enf; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238043AbjFFNJp (ORCPT + 99 others); Tue, 6 Jun 2023 09:09:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38200 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238049AbjFFNJm (ORCPT ); Tue, 6 Jun 2023 09:09:42 -0400 Received: from mail-yw1-x112f.google.com (mail-yw1-x112f.google.com [IPv6:2607:f8b0:4864:20::112f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1D4C41732 for ; Tue, 6 Jun 2023 06:09:23 -0700 (PDT) Received: by mail-yw1-x112f.google.com with SMTP id 00721157ae682-561b7729a12so107839367b3.1 for ; Tue, 06 Jun 2023 06:09:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1686056959; x=1688648959; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=+Xm/CNMHshFy7bplLeKTHXDpomyMsO5Dg+LOOn87+dA=; b=PCXN8enfB5ZAE7Nqy5vzkMW58Wip94mKANs1JvNACWCr1eKbBdZhn2MBubROVtznzn 3qVg77PS7d9efXXM2Lt9D/dw1Gcwh/TrQ0mYx196SDCL1GXPQlaf2671C3kBrGr77a0N liGC80cRfHBhchg58v4vv5ewlo6551vCYgKjekeeGJoOLrRy81dDwVt4XrORhxQn0apU +dEnZNO4f6ygRbV+8Wgiz2501s3dyBf5yD9i8VBZIE0oopjQSiLqPax6RC4stTRzGO6D JmMiLgtn6HxcnPArE18p6SSrsi6DwsDKZ0TeXwdGJmyuwQWjH7Fse3NbV0lg/omOJtLm WOSQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686056959; x=1688648959; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=+Xm/CNMHshFy7bplLeKTHXDpomyMsO5Dg+LOOn87+dA=; b=BOKejnlfp5CiX3QIHbeogdyLWKTaWdpMl1NWs2nM6CUqs/exBeOTnMBeqmDbmsOa1m /nYgvnSkMQtTJDg+NzottPLLs0kOXubn8meqhgnurrkc5CDiaU8p2tHgbK3xBY4Ef0y+ 3sRAqB7oXZsZX5HRXG+HohzH3gQMAuoCZUidXLeoOw6VHplWS0QYYjKXqIIwD7mj/A5e XBBS9HCOxTzLoe2bD9ACKUk1wZOhLEYkU4+Pjmi332JgOVw4L4fEZJ6tjgbxm1eq81yS Gu0Oz3VMkqh9icml9F5Im14rDo7L5/bkLA0vHDCtzd4rf9Of6CNr761yRhwhDaMMSMRj hDDA== X-Gm-Message-State: AC+VfDw+RnP0QLb5de0PGtdr6lnkA5QklkB/iKsfy33VksY2fY6d6Pur OxQwC1MLF+t1n5oAxXxjZ9Z3Bua2RHKLdySMctkR+VzZwTvl9w== X-Received: by 2002:a81:8308:0:b0:565:3215:7771 with SMTP id t8-20020a818308000000b0056532157771mr13401746ywf.12.1686056959264; Tue, 06 Jun 2023 06:09:19 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Chris Bainbridge Date: Tue, 6 Jun 2023 14:09:08 +0100 Message-ID: Subject: Re: PROBLEM: skew message does not handle negative ns skew To: Feng Tang Cc: paulmck@kernel.org, tglx@linutronix.de, sboyd@kernel.org, LKML Content-Type: text/plain; charset="UTF-8" X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 6 Jun 2023 at 13:50, Feng Tang wrote: > > And I'm have no idea if there is a real hardware/firmware issue > or just a false alarm. Is a negative reported skew valid? I don't know, I had assumed so, so the problem was the conversion from -878159 ns to 18446744073708 ms.