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Received: from [2601:1c0:6280:3f0::19c2] by merlin.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kHzrb-00052l-5N; Tue, 15 Sep 2020 01:34:31 +0000 Subject: Re: fbcon: remove soft scrollback code (missing Doc. patch) To: Bhaskar Chowdhury , Linus Torvalds , LKML , "linux-doc@vger.kernel.org" , Greg Kroah-Hartman , Daniel Vetter , Yuan Ming , Willy Tarreau , Bartlomiej Zolnierkiewicz , NopNop Nop , =?UTF-8?B?5byg5LqR5rW3?= , Andy Lutomirski , Jonathan Corbet References: <20200915012800.GA17809@Gentoo> From: Randy Dunlap Message-ID: Date: Mon, 14 Sep 2020 18:34:25 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.12.0 MIME-Version: 1.0 In-Reply-To: <20200915012800.GA17809@Gentoo> Content-Type: text/plain; charset=windows-1252 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 9/14/20 6:28 PM, Bhaskar Chowdhury wrote: > On 18:18 Mon 14 Sep 2020, Randy Dunlap wrote: >> HI-- >> >> On 9/14/20 3:48 PM, Linux Kernel Mailing List wrote: >>> Commit:     50145474f6ef4a9c19205b173da6264a644c7489 >>> Parent:     856deb866d16e29bd65952e0289066f6078af773 >>> Refname:    refs/heads/master >>> Web:        https://git.kernel.org/torvalds/c/50145474f6ef4a9c19205b173da6264a644c7489 >>> Author:     Linus Torvalds >>> AuthorDate: Mon Sep 7 11:45:27 2020 -0700 >>> Committer:  Linus Torvalds >>> CommitDate: Mon Sep 14 10:06:15 2020 -0700 >>> >>>     fbcon: remove soft scrollback code >>>         This (and the VGA soft scrollback) turns out to have various nasty small >>>     special cases that nobody really is willing to fight.  The soft >>>     scrollback code was really useful a few decades ago when you typically >>>     used the console interactively as the main way to interact with the >>>     machine, but that just isn't the case any more. >> >> and: >> >>> Commit:     973c096f6a85e5b5f2a295126ba6928d9a6afd45 >>> Parent:     06a0df4d1b8b13b551668e47b11fd7629033b7df >>> Refname:    refs/heads/master >>> Web:        https://git.kernel.org/torvalds/c/973c096f6a85e5b5f2a295126ba6928d9a6afd45 >>> Author:     Linus Torvalds >>> AuthorDate: Wed Sep 9 14:53:50 2020 -0700 >>> Committer:  Linus Torvalds >>> CommitDate: Mon Sep 14 10:06:15 2020 -0700 >>> >>>     vgacon: remove software scrollback support >> >> >> >> diffstats: >> >>> --- >>>  drivers/video/fbdev/core/fbcon.c | 334 +-------------------------------------- >>>  1 file changed, 4 insertions(+), 330 deletions(-) >> >>>  arch/powerpc/configs/pasemi_defconfig |   1 - >>>  arch/powerpc/configs/ppc6xx_defconfig |   1 - >>>  arch/x86/configs/i386_defconfig       |   1 - >>>  arch/x86/configs/x86_64_defconfig     |   1 - >>>  drivers/video/console/Kconfig         |  46 ------- >>>  drivers/video/console/vgacon.c        | 221 +--------------------------------- >>>  6 files changed, 1 insertion(+), 270 deletions(-) >> >> >> >> >> Now someone can remove the documentation for scrollback (and "no-scroll")... >> >> > If you wont mind ...let me stab at it ... Sure, go for it. Thanks. > > Documentation/admin-guide/kernel-parameters.txt:        no-scroll       [VGA] Disables scrollback. > Documentation/fb/fbcon.rst:2. fbcon=scrollback:[k] > Documentation/fb/fbcon.rst:     The scrollback buffer is memory that is used to preserve display > Documentation/fb/matroxfb.rst:   with 'video=scrollback:0'. > Documentation/fb/sstfb.rst:  disable software scrollback, as it can oops badly ... > Documentation/fb/vesafb.rst:            * You'll get scrollback (the Shift-PgUp thing), > Documentation/fb/vesafb.rst:              the video memory can be used as scrollback buffer -- ~Randy