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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 02770C2BB45 for ; Mon, 15 Aug 2022 23:22:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1353099AbiHOXVz (ORCPT ); Mon, 15 Aug 2022 19:21:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44102 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344206AbiHOXO3 (ORCPT ); Mon, 15 Aug 2022 19:14:29 -0400 Received: from omta002.cacentral1.a.cloudfilter.net (omta002.cacentral1.a.cloudfilter.net [3.97.99.33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 823D3C36 for ; Mon, 15 Aug 2022 13:01:49 -0700 (PDT) Received: from shw-obgw-4001a.ext.cloudfilter.net ([10.228.9.142]) by cmsmtp with ESMTP id NafDohA5SSp39NgHUoo5D8; Mon, 15 Aug 2022 20:01:48 +0000 Received: from fanir.tuyoix.net ([68.150.218.192]) by cmsmtp with ESMTP id NgHTohIc5uJwwNgHTo2TQk; Mon, 15 Aug 2022 20:01:48 +0000 X-Authority-Analysis: v=2.4 cv=F+BEy4tN c=1 sm=1 tr=0 ts=62faa62c a=LfNn7serMq+1bQZBlMsSfQ==:117 a=LfNn7serMq+1bQZBlMsSfQ==:17 a=biHskzXt2R4A:10 a=M51BFTxLslgA:10 a=nlC_4_pT8q9DhB4Ho9EA:9 a=cm27Pg_UAAAA:8 a=rTkU1oqxSLEUetzfa08A:9 a=QEXdDO2ut3YA:10 a=xmb-EsYY8bH0VWELuYED:22 Received: from CLUIJ (cluij.tuyoix.net [192.168.144.15]) (authenticated bits=0) by fanir.tuyoix.net (8.17.1/8.17.1) with ESMTPSA id 27FK1jhk021792 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NO); Mon, 15 Aug 2022 14:01:45 -0600 Date: Mon, 15 Aug 2022 14:01:35 -0600 (Mountain Daylight Time) From: =?UTF-8?Q?Marc_Aur=C3=A8le_La_France?= To: John Ogness cc: Sergey Senozhatsky , Petr Mladek , linux-kernel@vger.kernel.org, Steven Rostedt Subject: Re: [PATCH] printk: Export log_buf_len to userland In-Reply-To: <87wnb9pk8k.fsf@jogness.linutronix.de> Message-ID: References: <87wnb9pk8k.fsf@jogness.linutronix.de> User-Agent: Alpine 2.20 (WNT 67 2015-01-07) MIME-Version: 1.0 Content-Type: multipart/mixed; BOUNDARY="115511-10179-1660593697=:1956" X-CMAE-Envelope: MS4xfK4qv7+gra4/No48+I6OHOAAcujcXRS/PfnQikgxcDSrrZP8L+TerLeHy145s/KAceVypRDil5xRxeB1/vzUSby/f7rIDkgSck1YqkCDCzkaIarhqx9/ K83x6mgacZAZD6UJ1bRwJrj81dGWHJUI0IkmTVOcDAWJaAdwa4IovLzKJ8pIkAKC+CcRdXZhJBSqQ/pR5IENNVwCjTpvCD7WHgtTG7GXVpBjMk6vO0XSBbZm HajaaQ/TvJX2ofptE1UlCCyI/givaCNAV38SrV12FEYyq1557j6shxIus4dIuXaCCpPjVDVE/AheK9Dmk0GT5zDEYEFyLvppEAweRIE04oo= Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --115511-10179-1660593697=:1956 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8BIT On Mon, 15 Aug 2022, John Ogness wrote: > On 2022-08-15, Sergey Senozhatsky wrote: >> On (22/08/10 14:25), Marc Aurèle La France wrote: >>> Make the kernel log's buffer size available to userland so it can be >>> used with `dmesg -s`. > This information is already available via: > klogctl(SYSLOG_ACTION_SIZE_BUFFER, NULL, 0) > And dmesg already uses this with "dmesg -S". Thanks for the much more helpful reply. Have a great day. Marc. --115511-10179-1660593697=:1956--