From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f44.google.com (mail-wm1-f44.google.com [209.85.128.44]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 100B23CA4AB for ; Thu, 16 Jul 2026 13:36:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.44 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784208976; cv=none; b=ht8jT2z0G/X9z6cu4cQ5vEmb6SxjEDpPqrjBY29W2SQbutr55z6uQLtyIfvAhuiwxcNIEbKr8P25bWj/z6rZGXSezQigfPKEC6IqYR2gcmH5Hlu8pHWTJKy9jN1zG77zbausED7zvVbWCDI+20z8EdQEccsYbbWAtCsYxLa8Ja4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784208976; c=relaxed/simple; bh=Oecs3cF7VsLepHL3npOZJPC4VeDjnKqWP0cNPB4v85I=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=sy95usov/BDSaYZ387oBaKDwZAHKfRSTqQUBRjF1ipGAOmIZP3N8XjSK9dplfdeykFumcwHvI874RJxWVtJDRJBdcidiL4YQnMNJb0xN55B+UiVD5UMpZqM5EITmHeSwjFGHcDNuKTAvy1FZpqRbdTLq499GsCWHEcYXen08uUU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=suse.com; spf=pass smtp.mailfrom=suse.com; dkim=pass (2048-bit key) header.d=suse.com header.i=@suse.com header.b=BL+kYXD2; arc=none smtp.client-ip=209.85.128.44 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=suse.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=suse.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=suse.com header.i=@suse.com header.b="BL+kYXD2" Received: by mail-wm1-f44.google.com with SMTP id 5b1f17b1804b1-4921eed3fa2so54550905e9.0 for ; Thu, 16 Jul 2026 06:36:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=google; t=1784208972; x=1784813772; darn=lists.linux.dev; h=in-reply-to:content-disposition:content-type:mime-version :references:message-id:subject:cc:to:from:date:from:to:cc:subject :date:message-id:reply-to:content-type; bh=ZxMW+cZvUWvRljOA6VXL+6atXYnie85udU5ilmsN1H0=; b=BL+kYXD2ehZoyLW867XsmeWG4DPCk+VrKWTQtD+uSkI60lu+Ybo9/UETF+FAZPfKJm WaOXb7ehTq10SxwgF1gKLWiL5UZdg9f1Cq00yzNNZje08BAnHD+SAbYG/epUhD/6uCsS e6WYqb2YxbpXda3RvxAovZNkkSv/WYOhABaurQKejBlatFO7VbGjdw3QxbcpKEBd2n1X d4pDbbzRms2wVJoa8OSMGFTjLQQO1eps6D9Fi+82/WfJrzDHJSfImWiUJrez6BlSZ9eS SzY3WZNMH66wyW/GwGEiHYXABG7lVWCgjY2rCQznGXLH+jHssAxsnd13hAZozLmT3Z4Z 4JvQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1784208972; x=1784813772; h=in-reply-to:content-disposition:content-type:mime-version :references:message-id:subject:cc:to:from:date:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=ZxMW+cZvUWvRljOA6VXL+6atXYnie85udU5ilmsN1H0=; b=WUJ2ES73rCD7xqP90jCbl1xE174wYOD4Eq5TqOtrjd6BbJVAk9UCDhTie7kXUdHTV/ JuQP2zKvsTDXEqCZ34y6jipKOer5w1tVJkw3bie97TB4JqN/LCEmgweQtjql4iaLS1f1 rkTqnGNfiAO3+kssANXusNTf0Kmt94BlZvOLLVmSCTiFHZX09ydGgSzj9zX8vHRoomjS 6SLGO/xwY8vJs0EEMtTw+X6SsPvwhKzWbV/kfLF3CR9+tjSzmyN7yig9+mPBGdljxupr z4sLNfcy3ELVvrnR1SftdlJd1Vg5/tp4W4m4uYaDDwtaOqZerxthVfGq+Tm4Gl5B8uDj YVxg== X-Forwarded-Encrypted: i=1; AHgh+Rq+UhrjalEB8TdbANZlVWucBdoVhEdmrZ15b38eedKArzmEOWsNiiibuvMDV0aTQdH9KZwvSWvbsgEYz5EXKg==@lists.linux.dev X-Gm-Message-State: AOJu0Yy6jYI+MnhaOvJOAsT/D0TzJ3Sggit4xxWT11VDJja2U0brWFQ1 9CSKI1HpjP7Fe4ImecLpwZ880C64xg3K82Wm5CXxw+42jh6g43ZNi3cuae+Gip1SA/8= X-Gm-Gg: AfdE7ckBvIO2na4vsgC8ROFor9P6ogxWLd9L5iQWlJfDGUaTwB3OXPRS/cgAbjU9pUc qLds66GbI/qGBjkcLL06zXcE5HmpPv+sVeXCBxIjS8SvHjaSR1nwK2LA//sBrJqL/xo6Vxz1uc8 jKd4sUSEMq9dsPWVf+LAUTpavwpvlKFU6cNfKmx5LYL5R8Gjcr6UPnizTZE39i4mgDLLX1CLdhA 7Cy8sirYgsmW6cUO6yZURFs7PH/EJ8ldOXMm/h1QJsuoCBFHwu7FcvN1RrfzSHGkVVhXBVfwkef jladNdVbVJN6I3vJwfcoF3wMyG4JxqVs2qITxU0iBBZvNpXYsed0R85cbIUi39OS+zoFEzOnOqP 0LouHRj/3oDvwQ/dhT4mvhv2LlyCovtCfTBT9QGjhN4poPgU4WS6yZZUojXqKKLbwNVDMaSvLKZ ncy9d7 X-Received: by 2002:a05:600d:644d:20b0:493:c601:3e23 with SMTP id 5b1f17b1804b1-49538992cfbmr95343205e9.5.1784208972253; Thu, 16 Jul 2026 06:36:12 -0700 (PDT) Received: from pathway.suse.cz ([176.114.240.130]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-47f464c1f84sm24902683f8f.29.2026.07.16.06.36.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Jul 2026 06:36:12 -0700 (PDT) Date: Thu, 16 Jul 2026 15:36:09 +0200 From: Petr Mladek To: Andrew Murray Cc: Steven Rostedt , 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 4/6] printk: deprecate boot_delay in favour of printk_delay Message-ID: References: <20260712-printkcleanup-v3-0-574547b8f71b@thegoodpenguin.co.uk> <20260712-printkcleanup-v3-4-574547b8f71b@thegoodpenguin.co.uk> 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: <20260712-printkcleanup-v3-4-574547b8f71b@thegoodpenguin.co.uk> On Sun 2026-07-12 11:20:35, Andrew Murray wrote: > The boot_delay (BOOT_PRINTK_DELAY) kernel parameter and printk_delay sysctl > are two distinct mechanisms for providing similar functionality which add a > delay prior to each printed printk message. > > boot_delay provides a kernel parameter for delaying printk output from > kernel start through to boot (SYSTEM_RUNNING), whereas printk_delay is > configurable only via sysctl and thus is only used post boot. > > Let's deprecate the boot_delay feature in favour of printk_delay. In order > to preserve functionality, we'll also extend printk_delay such that it can > additionally configured via an early kernel parameter. > > Behavior change: > > The delay enabled by both "boot_delay" and "printk_delay" continues > working even in SYSTEM_RUNNING state. It must be explicitly stopped > by setting printk_delay=0 via sysctl. > > The delay is skipped when the message is suppressed in all system > states. It used to skipped only for the boot_delay. s/used to skipped/used to be skipped/ > Signed-off-by: Andrew Murray The code changes look good to me. With the above typo fix: Reviewed-by: Petr Mladek Best Regards, Petr