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 X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 868B2C5CFE7 for ; Tue, 10 Jul 2018 02:14:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3C3DB208A2 for ; Tue, 10 Jul 2018 02:14:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3C3DB208A2 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=goodmis.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932949AbeGJCOJ (ORCPT ); Mon, 9 Jul 2018 22:14:09 -0400 Received: from mail.kernel.org ([198.145.29.99]:57128 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932620AbeGJCOF (ORCPT ); Mon, 9 Jul 2018 22:14:05 -0400 Received: from vmware.local.home (cpe-66-24-56-78.stny.res.rr.com [66.24.56.78]) (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 711112089E; Tue, 10 Jul 2018 02:14:04 +0000 (UTC) Date: Mon, 9 Jul 2018 22:14:02 -0400 From: Steven Rostedt To: "Tobin C. Harding" Cc: Theodore Ts'o , Petr Mladek , Andy Shevchenko , Randy Dunlap , Sergey Senozhatsky , Arnd Bergmann , linux-kernel@vger.kernel.org Subject: Re: [PATCH 3/3] docs: Fix docs for boot parameter debug_boot_weak_hash Message-ID: <20180709221402.7e18c422@vmware.local.home> In-Reply-To: <20180710002519.5044-4-me@tobin.cc> References: <20180710002519.5044-1-me@tobin.cc> <20180710002519.5044-4-me@tobin.cc> X-Mailer: Claws Mail 3.15.1 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 10 Jul 2018 10:25:19 +1000 "Tobin C. Harding" wrote: > Recently boot parameter 'debug_boot_weak_hash' was added. Latter > discussion on LKML developed more descriptive documentation but due to > the programmers lack of understanding (*cough* me) on how linux-next > works these improvements never got picked up. > > Update documentation for boot parameter 'debug_boot_weak_hash' as > discussed (patch posted and acked) on LKML. > > Fixes: bfe80ed3d7c76 ("vsprintf: add command line option debug_boot_weak_hash") > Acked-by: Randy Dunlap > Signed-off-by: Tobin C. Harding Reviewed-by: Steven Rostedt (VMware) -- Steve > --- > Documentation/admin-guide/kernel-parameters.txt | 13 ++++++------- > 1 file changed, 6 insertions(+), 7 deletions(-) > > diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt > index 31c9b76058a7..e3b1c84d19c6 100644 > --- a/Documentation/admin-guide/kernel-parameters.txt > +++ b/Documentation/admin-guide/kernel-parameters.txt > @@ -749,13 +749,12 @@ > debug [KNL] Enable kernel debugging (events log level). > > debug_boot_weak_hash > - [KNL] Enable printing pointers early in the boot > - sequence. If enabled, we use a weak hash instead of > - siphash to hash pointers. Use this option if you need > - to see pointer values during early boot (i.e you are > - seeing instances of '(___ptrval___)'). > - Cryptographically insecure, please do not use on > - production kernels. > + [KNL] Enable printing [hashed] pointers early in the > + boot sequence. If enabled, we use a weak hash instead > + of siphash to hash pointers. Use this option if you are > + seeing instances of '(___ptrval___)') and need to see a > + value (hashed pointer) instead. Cryptographically > + insecure, please do not use on production kernels. > > debug_locks_verbose= > [KNL] verbose self-tests