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 3063DC433F5 for ; Tue, 19 Oct 2021 18:10:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 14CE061373 for ; Tue, 19 Oct 2021 18:10:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234846AbhJSSMT (ORCPT ); Tue, 19 Oct 2021 14:12:19 -0400 Received: from mail.kernel.org ([198.145.29.99]:42822 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232130AbhJSSMR (ORCPT ); Tue, 19 Oct 2021 14:12:17 -0400 Received: from gandalf.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 58B9361057; Tue, 19 Oct 2021 18:10:04 +0000 (UTC) Date: Tue, 19 Oct 2021 14:10:02 -0400 From: Steven Rostedt To: "Zanussi, Tom" Cc: Yang Jihong , linux-kernel Subject: Re: [QUESTION] Performance deterioration caused by commit 85f726a35e504418 Message-ID: <20211019141002.386e7b6a@gandalf.local.home> In-Reply-To: References: <992d3b1c-70db-5cc7-8400-39caa5d502d5@huawei.com> <20211018093731.2dd5917f@gandalf.local.home> <19e4222c-c9ac-5c1a-0c3a-b8bfd3524ab7@huawei.com> <20211018225112.3f6bda99@gandalf.local.home> X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 19 Oct 2021 12:30:28 -0500 "Zanussi, Tom" wrote: > So anyway, as far as the histograms go, I think optimizing the two > changes in 85f726a35e504418 while ignoring trailing garbage can be done > without affecting the histogram correctness. So, none of that is exported to user space? -- Steve