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[2620:137:e000::1:20]) by mx.google.com with ESMTP id j7-20020a056a00234700b0052d70adee62si12137546pfj.309.2022.08.15.09.15.29; Mon, 15 Aug 2022 09:15:40 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@linutronix.de header.s=2020 header.b=B7viINiX; dkim=neutral (no key) header.i=@linutronix.de; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=linutronix.de Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231147AbiHOQD2 (ORCPT + 99 others); Mon, 15 Aug 2022 12:03:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52924 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229586AbiHOQD1 (ORCPT ); Mon, 15 Aug 2022 12:03:27 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6E688183A0 for ; Mon, 15 Aug 2022 09:03:26 -0700 (PDT) From: John Ogness DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1660579404; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=+AsJV3flOno2NrQgxHNdsQYlCfJKACvrXjTxeqHxHxU=; b=B7viINiX+34MR5eDqmTZDXUtWlqD0xG7HDPJk7p391fzBfs/JIGI64o4fm3E4aAS72foes X8q9oIoae5i2Cxnt89+NoUCrKQ+2T655XatAHVQguI48DpBSELktBrFIl9gtqoBHUXTT1b Y8izRo9hMwniEBUedb2ysIdD28II8sGFD/Z0aEJ0LYYb8THbQQysh13uB8P6htrawc2W7g LG+jCH2Bjcn9+hQygD0qRgGPinMjzKvf0QaHSU5ktj06A9agWFwP3n9+FhSm9YgCd9PDY/ zuk+vV0bg4EnF8HhqVleYPypdnbvxm7XOyKV4mYjHSXVKXpm6hcGRTs8bZdUWA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1660579404; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=+AsJV3flOno2NrQgxHNdsQYlCfJKACvrXjTxeqHxHxU=; b=OQXtv4OUlirT7VzL6ONHU2E3vdelqsHMZ87e/ACiWWO3b/Tq9SJP3beadK+L1mmFRjLx/p RzbSMf602dwDQmAQ== To: Sergey Senozhatsky , Marc =?utf-8?Q?Aur?= =?utf-8?Q?=C3=A8le?= La France Cc: Petr Mladek , Sergey Senozhatsky , linux-kernel@vger.kernel.org, Steven Rostedt Subject: Re: [PATCH] printk: Export log_buf_len to userland In-Reply-To: References: Date: Mon, 15 Aug 2022 18:09:23 +0206 Message-ID: <87wnb9pk8k.fsf@jogness.linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Status: No, score=-3.9 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,INVALID_DATE_TZ_ABSURD, RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2022-08-15, Sergey Senozhatsky wrote: > On (22/08/10 14:25), Marc Aur=C3=A8le La France wrote: >>=20 >> 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". John Ogness