From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7E5D4C433EF for ; Sat, 9 Oct 2021 18:25:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 62DE860F23 for ; Sat, 9 Oct 2021 18:25:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229937AbhJIS1i (ORCPT ); Sat, 9 Oct 2021 14:27:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55212 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229518AbhJIS1h (ORCPT ); Sat, 9 Oct 2021 14:27:37 -0400 Received: from mail-pj1-x102d.google.com (mail-pj1-x102d.google.com [IPv6:2607:f8b0:4864:20::102d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0E320C061570; Sat, 9 Oct 2021 11:25:40 -0700 (PDT) Received: by mail-pj1-x102d.google.com with SMTP id oa12-20020a17090b1bcc00b0019f715462a8so10223929pjb.3; Sat, 09 Oct 2021 11:25:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=Rq0DT40wgeoIBahXvlXDN6qrZsJagfk0p3A+Wt86z44=; b=cwle96yXpzeSO0zhPME/a7UdxCdZ1xJ30Z5HjCsAwsJsRhFONTm4oTr+QoCUGIQr6k o0BlxKDt/wGGNStuQhlPUkLihuCPDboSHl5M9x/FAlKLmHglnzimlkap4oDmHepdhGUz ZgkNIW0Fkbgowl5VhHqFj4irwAemHMF6WE3oWF02nBBq+N2811jAJQlh74hD93sHlxhV w0miNOub+2oVpC8f559uXC5wg7YZniZjdBQBKVbXOmt3fgfTWs/o3jjDXOmn7tNY+ylH wWW9eO3Sxf78EoidqDHVAvu5mGpHwt76pd62SnHJ9AdMtO7e+GRevBJr/Xu6s+DgPJHU EHhw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=Rq0DT40wgeoIBahXvlXDN6qrZsJagfk0p3A+Wt86z44=; b=TT3gP5PhQ7beNTTx+AcbsdIMmKXnINNp4jhn8KDyRreJaAV78CIlz1QlSGyODjIuV8 LlDAzwONk+ALDZ+cttXnTgkVHqzFkCpkWbs1F2fEbFuzgeazaXXNixLtcCskW5BUjaqw ZS+hyFunUUKQWuVobKtm5ZpmA0wG50MQpWDiI3st0hQ6dpDsxQ4ffAmx+qSblxO5AsmF JjvzwtOWMiwoClVe4tHCKZOhsVOaHkUmHn4gF+1SzFDA0K8VG/FxDLazac1HLqEpOWn3 qfvzQWr8MciAkduM9DZvoOI94+HvBYs+2TE4OfEmP7EulyzBp+CG7+09wfWQ/xtZ3CqS t/IQ== X-Gm-Message-State: AOAM530F3/5b8ZHZED7lwP3q2TNYvhDhnnb50SEtpu0k3a644kisCzcV Nu/K58C5i5ZaSjEzOfUGSGU= X-Google-Smtp-Source: ABdhPJwv9ZNBaYid+cjoF5VHExieieinvF0GF619iQlFcY5xseXd55VzyAiiblbgVxA+ZZcOGuGeOg== X-Received: by 2002:a17:902:6f01:b0:13b:7b8b:84a3 with SMTP id w1-20020a1709026f0100b0013b7b8b84a3mr15619760plk.40.1633803939610; Sat, 09 Oct 2021 11:25:39 -0700 (PDT) Received: from hoboy.vegasvil.org ([2601:645:c000:2163:e2d5:5eff:fea5:802f]) by smtp.gmail.com with ESMTPSA id b16sm2848283pfm.58.2021.10.09.11.25.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 09 Oct 2021 11:25:39 -0700 (PDT) Date: Sat, 9 Oct 2021 11:25:36 -0700 From: Richard Cochran To: Sebastien Laveze Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, yangbo.lu@nxp.com, yannick.vignon@oss.nxp.com, rui.sousa@oss.nxp.com Subject: Re: [PATCH net-next] ptp: add vclock timestamp conversion IOCTL Message-ID: <20211009182536.GC21759@hoboy.vegasvil.org> References: <20210927202304.GC11172@hoboy.vegasvil.org> <98a91f5889b346f7a3b347bebb9aab56bddfd6dc.camel@oss.nxp.com> <20210928133100.GB28632@hoboy.vegasvil.org> <0941a4ea73c496ab68b24df929dcdef07637c2cd.camel@oss.nxp.com> <20210930143527.GA14158@hoboy.vegasvil.org> <20211007201927.GA9326@hoboy.vegasvil.org> <768227b1f347cb1573efb1b5f6c642e2654666ba.camel@oss.nxp.com> <20211009182414.GB21759@hoboy.vegasvil.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20211009182414.GB21759@hoboy.vegasvil.org> User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Oct 09, 2021 at 11:24:14AM -0700, Richard Cochran wrote: > Show that it always works, even with worst case crazy adjustments. For example: * large frequency adjustments are more problematic. I've checked that some drivers allow up to 10^6 ppm... This could lead to non-negligible error. Thanks, Richard