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From: andre@osku.de (Andre Schmidt)
To: kernelnewbies@lists.kernelnewbies.org
Subject: Minimum build config for boot messages
Date: Tue, 23 Aug 2016 14:56:29 +0200	[thread overview]
Message-ID: <20160823145629.4288c340@foobaer> (raw)
In-Reply-To: <4b19886e-502c-635d-e7e0-539b452ea640@johannesthoma.com>

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

      reply	other threads:[~2016-08-23 12:56 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-08-19 14:17 Minimum build config for boot messages Andre Schmidt
2016-08-22 16:49 ` John de la Garza
2016-08-22 18:50 ` Johannes Thoma
2016-08-23 12:56   ` Andre Schmidt [this message]

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