From mboxrd@z Thu Jan  1 00:00:00 1970
From: andre@osku.de (Andre Schmidt)
Date: Tue, 23 Aug 2016 14:56:29 +0200
Subject: Minimum build config for boot messages
In-Reply-To: <4b19886e-502c-635d-e7e0-539b452ea640@johannesthoma.com>
References: <20160819161722.24f7c4c1@foobaer>
	<4b19886e-502c-635d-e7e0-539b452ea640@johannesthoma.com>
Message-ID: <20160823145629.4288c340@foobaer>
To: kernelnewbies@lists.kernelnewbies.org
List-Id: kernelnewbies.lists.kernelnewbies.org

On Mon, 22 Aug 2016 20:50:49 +0200
Johannes Thoma <johannes@johannesthoma.com> wrote:

> Did you also disable CONFIG_PRINTK ? Without that kernel will not print 
> anything, as far as I know.

hmm,

i tried with following:

CONFIG_PRINTK=y
CONFIG_EARLY_PRINTK=y

both adding through KCONFIG_ALLCONFIG and `make menuconfig`. still no kernel messages :/

FWIW, heres the `diffconfig` of adding above with `make menuconfig` over allnoconfig:

 EARLY_PRINTK n -> y
 PRINTK n -> y
+BOOT_PRINTK_DELAY n
+LOG_BUF_SHIFT 17
+NMI_LOG_BUF_SHIFT 13
+PRINTK_NMI y
+PRINTK_TIME n

i assume something is still missing (from the 289 changes that CONFIG_EMBEDDED=n does over allnoconfig).

Cheers
Andre Schmidt