Received: by 2002:a25:8b12:0:0:0:0:0 with SMTP id i18csp1901979ybl; Sun, 18 Aug 2019 13:12:57 -0700 (PDT) X-Google-Smtp-Source: APXvYqwudmfPISoi5mcxuReTvX5Ha/BSIKteNoX1fO8ex6yP/B+g2PAfmG6VTB7WV1atnRMZw2hu X-Received: by 2002:a65:6891:: with SMTP id e17mr17334607pgt.305.1566159177719; Sun, 18 Aug 2019 13:12:57 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1566159177; cv=none; d=google.com; s=arc-20160816; b=qMuFXQ5ZCNg5gMtb/IncqX7bfNr6MBl3c/itK+/kqdi84TXqrEu+3mdZhjbDU9fXH7 5YsgxbSacBp2i6gA6YsOfk8D+86otlUCBrWc+Y1WWUzVzbVqBnbHFzn23BJ2Wnk70IlX K3LXf13E8x5UpiWkJ91C7KYz6y4kmdCK8SbMSWiyYnf6CLBkvJydPG6SE/FlCGn1b8Kc oAC4HH47xYG3PRu2isyC2XJt7tiI2ZzT1VeR6rlJ3OEsLR972Hl/Wdl5VeFs12GgAuW/ 5GaUA3OwCw3NmFXh8SJpkvwzrqlM60cWxnz/HvUB9KwCNPs9gw2ZKLPIHdEnq3f5iEad DuJA== 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:dkim-signature; bh=jK4nxwdgBuyoD1ZnaAuxfcxRj0U0B/VNxYmenqTfaAY=; b=VTX+IzizgChh1u0F7WFlJnr3hh7L49ElrZJRH3ss9J2L4xOoPb9wXkkHZ8kbcYScc5 wTXmuUC5DfQxL5p3dqxoufNRyHzeDowxEt67pAy3oe1EEA+HOFoPGGTK5r7KpDsNFO2x xuAlgzFFpIIsHgXmnA5+HOOLYooz5B5owN5goH9OOqZRP8qXQ4VGq16ZVCnceymMwn79 yYUL0dnGIBmkcfUaYzHsfJIde8c9kOrYmdyPZq1Ck/Js9jIKeyG5qn0bpW5jkJoBV72j hhZFRbRlbRCoZLPanRcuVLcvwSauNc6wBWCIy7sTGR/I0wWZ16AOKYE8dJlKZ5DenTEO h6zA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=by89bBij; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id q18si8384726pll.79.2019.08.18.13.12.42; Sun, 18 Aug 2019 13:12:57 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=by89bBij; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 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 S1727150AbfHRULy (ORCPT + 99 others); Sun, 18 Aug 2019 16:11:54 -0400 Received: from mail-pl1-f195.google.com ([209.85.214.195]:44800 "EHLO mail-pl1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726926AbfHRULx (ORCPT ); Sun, 18 Aug 2019 16:11:53 -0400 Received: by mail-pl1-f195.google.com with SMTP id t14so4734787plr.11; Sun, 18 Aug 2019 13:11:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=jK4nxwdgBuyoD1ZnaAuxfcxRj0U0B/VNxYmenqTfaAY=; b=by89bBijWdxceRG2lqxJcbcn6ff10EqqqqKKnaLaq9SL4A3+Z6q5D25qGSzHKdyN3A ExzMi0SMG9ZkFfD+Th9MP3Fs5dEGGJ9lNU86bs9fawK9H09tLiFSP0PSRUTJX4o9G8D1 oj023eB+rj9UCrtSdzBCKsHaVTwo4W3+pPQtHQ5ckxjMPZEqJXm98Mr4cd/G0JgZbeGM 53Xr5UYKlvzUVwG1aVja759KAKEQQPcfi287UfU4rRyVWzieTo6jC/LOP2LOXw2Acuma 0WyReRc8exu3Ko7qdlTrNYqdM3CR04YX3OF4q/WT6uGguFmKT+sCUaLhMzkUHX+NsEMW QWow== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=jK4nxwdgBuyoD1ZnaAuxfcxRj0U0B/VNxYmenqTfaAY=; b=AuSmthIKmWcNpk4TjRfSKA19NHOm1lEC2fjIr+LNqY12BKn9OwnK8qzcc5IgrwZZsk UrtAROgtNQu7yq2Mycp2REwF4KwzAerhsgue1aijB6KMRbiAix15sYdmfSovV91d5//O e5jbvufN3lLflP1JxEM8RdZh1eRYdnGopqWs/n1iNBt+QtW7eZayc9lYlXqrIfYIJT/T QlRC6M1G2JhkHBRynVCOOnAFoNCn8w54SlipNn0kLZWSKAsM7yxJ7uSY8BLPaDYWSjXM vJBWA+V1+JpGGP4g/kLvlJqPcxaIqU7h7PnZtjzJ+z7fu9SXSlMIY2/chfQL+oKwlpYV rRSQ== X-Gm-Message-State: APjAAAV8bVj2GMYGnhoLtvzjcidfS4PLwqKHNW2maJpKrx+yQ/3ETdDv weW2zWNYfDbInrNdQCmzVPo+ciP3 X-Received: by 2002:a17:902:20e5:: with SMTP id v34mr19293586plg.136.1566159113082; Sun, 18 Aug 2019 13:11:53 -0700 (PDT) Received: from localhost (c-73-222-71-142.hsd1.ca.comcast.net. [73.222.71.142]) by smtp.gmail.com with ESMTPSA id c35sm12073966pgl.72.2019.08.18.13.11.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 18 Aug 2019 13:11:52 -0700 (PDT) Date: Sun, 18 Aug 2019 13:11:50 -0700 From: Richard Cochran To: Joe Perches Cc: Felipe Balbi , Christopher S Hall , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/2] PTP: introduce new versions of IOCTLs Message-ID: <20190818201150.GA1316@localhost> References: <20190814074712.10684-1-felipe.balbi@linux.intel.com> <20190817155927.GA1540@localhost> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Aug 17, 2019 at 09:17:20AM -0700, Joe Perches wrote: > Is there a case where this initialization is > unnecessary such that it impacts performance > given the use in ptp_ioctl? None of these ioctls are sensitive WRT performance. They are all setup or configuration, or in the case of the OFFSET ioctls, the tiny extra delay before the actual measurement will not affect the result. Thanks, Richard