From patchwork Mon Mar 21 01:22:16 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Randy Dunlap X-Patchwork-Id: 12786728 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 34228C43219 for ; Mon, 21 Mar 2022 01:22:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237860AbiCUBXx (ORCPT ); Sun, 20 Mar 2022 21:23:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36034 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232714AbiCUBXw (ORCPT ); Sun, 20 Mar 2022 21:23:52 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 395F270928; Sun, 20 Mar 2022 18:22:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:In-Reply-To:References; bh=7sdUiS9GK2a9IHOMaMalD7HEg3D293dhjq705r7V1jI=; b=Teh+nVdS5SpmsugSPBqwZ2vtd0 +SGAN9nxcaeCe3VA5LVBeMAqUMzhmVKv18sUTKrjFyfop5ThCr3djxe15ixxXfRpem7/MuQEdzgWz CVVcIg/Dch7Ogyg+3sapjfNxUUDzrh6kqHpmGT/15Av4lUe5Po/R4ahBZ/grelV6Q9zF++WT96mDL qDvwtntshBNv3Lov8iKnswDa+tIeVHsiF49D5oIp90upBOF+zD3Hv6fsXXgxliPO9mluIobGUwGk8 3w5ldhwx4uHqWlFkNFKTwU9EfAI9a78p51Qfnkle88ey82rLKhI4AvArMYd3vzuZBsHFh1y7detFW 24gPw2vA==; Received: from [2601:1c0:6280:3f0::aa0b] (helo=bombadil.infradead.org) by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1nW6kU-006Dnt-Sg; Mon, 21 Mar 2022 01:22:19 +0000 From: Randy Dunlap To: linux-kernel@vger.kernel.org Cc: Randy Dunlap , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , linux-s390@vger.kernel.org, Steven Rostedt , Ingo Molnar , "David S. Miller" , sparclinux@vger.kernel.org, Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , linuxppc-dev@lists.ozlabs.org, linux-ia64@vger.kernel.org, "Rafael J. Wysocki" , Pavel Machek , Len Brown , linux-pm@vger.kernel.org, linux-acpi@vger.kernel.org, Johannes Weiner , Andrew Morton , Jonathan Corbet , linux-doc@vger.kernel.org Subject: [PATCH] Docs: admin/kernel-parameters: edit a few boot options Date: Sun, 20 Mar 2022 18:22:16 -0700 Message-Id: <20220321012216.23724-1-rdunlap@infradead.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Clean up some of admin-guide/kernel-parameters.txt: a. "smt" should be "smt=" (S390) b. add "smt-enabled" for POWERPC c. Sparc supports the vdso= boot option d. make the tp_printk options (2) formatting similar to other options by adding spacing e. add "trace_clock=" with a reference to Documentation/trace/ftrace.rst f. use [IA-64] as documented instead of [ia64] g. fix formatting and text for test_suspend= h. fix formatting for swapaccount= i. fix formatting and grammar for video.brightness_switch_enabled= Signed-off-by: Randy Dunlap Cc: Heiko Carstens Cc: Vasily Gorbik Cc: Alexander Gordeev Cc: Christian Borntraeger Cc: Sven Schnelle Cc: linux-s390@vger.kernel.org Cc: Steven Rostedt Cc: Ingo Molnar Cc: "David S. Miller" Cc: sparclinux@vger.kernel.org Cc: Michael Ellerman Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-ia64@vger.kernel.org Cc: "Rafael J. Wysocki" Cc: Pavel Machek Cc: Len Brown Cc: linux-pm@vger.kernel.org Cc: linux-acpi@vger.kernel.org Cc: Johannes Weiner Cc: Andrew Morton Cc: Jonathan Corbet Cc: linux-doc@vger.kernel.org --- Documentation/admin-guide/kernel-parameters.txt | 33 +++++++++----- 1 file changed, 22 insertions(+), 11 deletions(-) --- linux-next-20220318.orig/Documentation/admin-guide/kernel-parameters.txt +++ linux-next-20220318/Documentation/admin-guide/kernel-parameters.txt @@ -2814,7 +2814,7 @@ different yeeloong laptops. Example: machtype=lemote-yeeloong-2f-7inch - max_addr=nn[KMG] [KNL,BOOT,ia64] All physical memory greater + max_addr=nn[KMG] [KNL,BOOT,IA-64] All physical memory greater than or equal to this physical address is ignored. maxcpus= [SMP] Maximum number of processors that an SMP kernel @@ -3057,7 +3057,7 @@ mga= [HW,DRM] - min_addr=nn[KMG] [KNL,BOOT,ia64] All physical memory below this + min_addr=nn[KMG] [KNL,BOOT,IA-64] All physical memory below this physical address is ignored. mini2440= [ARM,HW,KNL] @@ -5382,13 +5382,19 @@ 1: Fast pin select (default) 2: ATC IRMode - smt [KNL,S390] Set the maximum number of threads (logical + smt= [KNL,S390] Set the maximum number of threads (logical CPUs) to use per physical CPU on systems capable of symmetric multithreading (SMT). Will be capped to the actual hardware limit. Format: Default: -1 (no limit) + smt-enabled= [PPC 64-bit] Enable SMT, disable SMT, or set the + maximum number of threads. This can be used to override + the Open Firmware (OF) option. + Format: on | off | + Default: all threads enabled + softlockup_panic= [KNL] Should the soft-lockup detector generate panics. Format: 0 | 1 @@ -5768,8 +5774,9 @@ This parameter controls use of the Protected Execution Facility on pSeries. - swapaccount=[0|1] - [KNL] Enable accounting of swap in memory resource + swapaccount= [KNL] + Format: [0|1] + Enable accounting of swap in memory resource controller if no parameter or 1 is given or disable it if 0 is given (See Documentation/admin-guide/cgroup-v1/memory.rst) @@ -5815,7 +5822,8 @@ tdfx= [HW,DRM] - test_suspend= [SUSPEND][,N] + test_suspend= [SUSPEND] + Format: { "mem" | "standby" | "freeze" }[,N] Specify "mem" (for Suspend-to-RAM) or "standby" (for standby suspend) or "freeze" (for suspend type freeze) as the system sleep state during system startup with @@ -5902,6 +5910,8 @@ trace_buf_size=nn[KMG] [FTRACE] will set tracing buffer size on each cpu. + trace_clock= [FTRACE] See Documentation/trace/ftrace.rst + trace_event=[event-list] [FTRACE] Set and start specified trace events in order to facilitate early boot debugging. The event-list is a @@ -5924,7 +5934,7 @@ See also Documentation/trace/ftrace.rst "trace options" section. - tp_printk[FTRACE] + tp_printk [FTRACE] Have the tracepoints sent to printk as well as the tracing ring buffer. This is useful for early boot up where the system hangs or reboots and does not give the @@ -5946,7 +5956,7 @@ frequency tracepoints such as irq or sched, can cause the system to live lock. - tp_printk_stop_on_boot[FTRACE] + tp_printk_stop_on_boot [FTRACE] When tp_printk (above) is set, it can cause a lot of noise on the console. It may be useful to only include the printing of events during boot up, as user space may @@ -6295,7 +6305,7 @@ HIGHMEM regardless of setting of CONFIG_HIGHPTE. - vdso= [X86,SH] + vdso= [X86,SH,SPARC] On X86_32, this is an alias for vdso32=. Otherwise: vdso=1: enable VDSO (the default) @@ -6321,11 +6331,12 @@ video= [FB] Frame buffer configuration See Documentation/fb/modedb.rst. - video.brightness_switch_enabled= [0,1] + video.brightness_switch_enabled= [ACPI] + Format: [0|1] If set to 1, on receiving an ACPI notify event generated by hotkey, video driver will adjust brightness level and then send out the event to user space through - the allocated input device; If set to 0, video driver + the allocated input device. If set to 0, video driver will only send out the event without touching backlight brightness level. default: 1