Received: by 2002:a05:6a10:d5a5:0:0:0:0 with SMTP id gn37csp2776033pxb; Fri, 8 Oct 2021 15:15:34 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxEC4Ozw273+0FpKtrXF4tUK9/iVjvvTI5qaTlw/XJAsIO03hJ26wml36JlKHYJ4M7yR7Fu X-Received: by 2002:a63:2c02:: with SMTP id s2mr6725676pgs.205.1633731333804; Fri, 08 Oct 2021 15:15:33 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1633731333; cv=none; d=google.com; s=arc-20160816; b=MHkdK6+74OKdD9+zijlQEF3YYMPVrUtHxHLpLmCLPqah7czsA8xXBXoMLAIQBvp7qw y/1FSkoW9wqV3xiuaO01Yu51b0G+6bsCt1kFGWnzer3bocrR0CmpedqFVOlXS16v5dAx 7C+QDSyrQSHE0xtV0hqwkfotf+9J9qLRo1TR/zNhEWPXsx5nm40809/Grl38AAGMu7g4 +QxN1rTG+DWQeNsBQh5oO6ssVz62BBFRKQkWclRJdVPNZUqREUzkxTUwTd3hZQQ99IJ7 rvAUThLlZEAga5uyDje/FjE5SD1Ml3g05OnYMRzCrLT/N7pcOrW/+ZxD9N9x9UfDBxEM TKPQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:subject:cc:to:from:date; bh=DJU8eTw+D6Tv9mCOQu44ORzEOKp3CNy0RDGSsV+J9Mc=; b=VkedYowtuRr88MGqaRC34RjzN3j4y5GBrun2hD5sXtcnbPcuKQJWvtBxzgc6DZrVU9 /izO638xaHzAUdXrK4D+IQDrKhtr4DMMY+IAwck6IUrjqzkkpEIW2816nswD1zUNIqo6 k48GMAv3e4Rs2ZvvxHoZHTqVSSmv//5IFid/YV7Zey8fxtLYyvSIUVYhnm3I/ATqlesO PD03FVMB/Kd3tONn2ayob7Tl444o9sh3vvD6Rdi7wh6xfkBIPmdjCZ1w1gX12Usa9yom pMfMEcEo8kyjsTDmj8ea3uogoXqbqnrxlfRGpFqXt9//gf4lbKX2meem/6lyUYqhO+XM t18w== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id w21si627601ply.335.2021.10.08.15.15.21; Fri, 08 Oct 2021 15:15:33 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243539AbhJHWPv (ORCPT + 99 others); Fri, 8 Oct 2021 18:15:51 -0400 Received: from mail.kernel.org ([198.145.29.99]:57986 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243594AbhJHWPr (ORCPT ); Fri, 8 Oct 2021 18:15:47 -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 4532360FDC; Fri, 8 Oct 2021 22:13:50 +0000 (UTC) Date: Fri, 8 Oct 2021 18:13:48 -0400 From: Steven Rostedt To: "Robin H. Johnson" Cc: Peter Zijlstra , linux-kernel@vger.kernel.org, mingo@redhat.com, rjohnson@digitalocean.com, Arnaldo Carvalho de Melo Subject: Re: [PATCH 1/2] tracing: show size of requested buffer Message-ID: <20211008181348.4c2488b7@gandalf.local.home> In-Reply-To: References: <20210831043723.13481-1-robbat2@gentoo.org> <20210907212426.73ed81d1@rorschach.local.home> <20211007071151.GL174703@worktop.programming.kicks-ass.net> <20211007092358.65152792@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 Thu, 7 Oct 2021 17:26:04 +0000 "Robin H. Johnson" wrote: > I was trying to think further what would make sense for the constant. > - What are the negative impacts of a too-large value? > - Is there demand for more reconfigurability? > - Should PERF_MAX_TRACE_SIZE be a knob in Kconfig? One thing you haven't discussed was, have you hit this warning, and if so, what were you doing? -- Steve