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Fri, 17 Jul 2026 02:10:34 -0700 (PDT) Date: Fri, 17 Jul 2026 11:10:32 +0200 From: Petr Mladek To: Steven Rostedt Cc: Andrew Murray , John Ogness , Sergey Senozhatsky , Jonathan Corbet , Shuah Khan , Russell King , Florian Fainelli , Broadcom internal kernel review list , Ray Jui , Scott Branden , Andrew Morton , Greg Kroah-Hartman , Sebastian Andrzej Siewior , Clark Williams , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rpi-kernel@lists.infradead.org, linux-rt-devel@lists.linux.dev Subject: Re: [PATCH v3 6/6] Documentation/kernel-parameters: add/update printk_delay/boot_delay Message-ID: References: <20260712-printkcleanup-v3-0-574547b8f71b@thegoodpenguin.co.uk> <20260712-printkcleanup-v3-6-574547b8f71b@thegoodpenguin.co.uk> <20260714175131.1edfc880@gandalf.local.home> Precedence: bulk X-Mailing-List: linux-rt-devel@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260714175131.1edfc880@gandalf.local.home> On Tue 2026-07-14 17:51:31, Steven Rostedt wrote: > On Sun, 12 Jul 2026 11:20:37 +0100 > Andrew Murray wrote: > > > diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt > > index 2884103b93bca7b76cd3a93946276074cf62d0a1..1118feda87b1b04543b1da0bd52c090b1fddaeac 100644 > > --- a/Documentation/admin-guide/kernel-parameters.txt > > +++ b/Documentation/admin-guide/kernel-parameters.txt > > @@ -650,11 +650,19 @@ Kernel parameters > > See Documentation/block/cmdline-partition.rst > > > > boot_delay= [KNL,EARLY] > > - Milliseconds to delay each printk during boot. > > - Only works if GENERIC_CALIBRATE_DELAY is enabled, > > - and you may also have to specify "lpj=". Boot_delay > > - values larger than 10 seconds (10000) are assumed > > - erroneous and ignored. > > + Milliseconds to delay each printk during and post boot. > > + Boot time delays only work if GENERIC_CALIBRATE_DELAY > > + is enabled. > > + > > + Once booted the delay can be removed or adjusted via > > + the printk_delay sysctl. > > + > > + Please note that you may also have to specify "lpj=". > > + Boot_delay values larger than 10 seconds (10000) are > > + assumed erroneous and ignored. > > + > > + This will soon be deprecated, please use printk_delay > > + instead. > > Format: integer > > > > bootconfig [KNL,EARLY] > > @@ -5468,6 +5476,19 @@ Kernel parameters > > printk.time= Show timing data prefixed to each printk message line > > Format: (1/Y/y=enable, 0/N/n=disable) > > > > + printk_delay= [KNL,EARLY] > > + Milliseconds to delay each printk during and post boot. > > + Boot time delays only work if GENERIC_CALIBRATE_DELAY > > + is enabled. > > + > > + Once booted the delay can be removed or adjusted via > > + the printk_delay sysctl. > > + > > + Please note that you may also have to specify "lpj=". > > + printk_delay values larger than 10 seconds (10000) are > > + assumed erroneous and ignored. > > + Format: integer > > + > > The two parameters descriptions are identical. They should show something > different. Is it just that the "boot_delay" name is getting deprecated? Good point. We could remove all the details from the boot_delay comment. Instead, we could say that it an obsolete alias to printk_delay, will soon be drecated, ... Best Regards, Petr