linux-kernel - Re: Long stalls during boot with -next

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 7 Oct 2011 18:57:19 +0530
From:	Thomas Abraham <thomas.abraham@...aro.org>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: Long stalls during boot with -next

Hi Mark,

On 7 October 2011 17:20, Mark Brown <broonie@...nsource.wolfsonmicro.com> wrote:
> On Thu, Sep 29, 2011 at 01:50:36PM +0100, Mark Brown wrote:
>> Since Tuesday I've been experiencing stalls on boot with -next kernels.
>> The boot appears to proceed normally but there appears to be a good ten
>> second delay somewhere around the late_initcall() stage with no
>> indication in the logs:
>
> I identified the problem here, the behaviour of LL_DEBUG was changed to
> make it select DEBUG_ICEDCC by default which is unfortunate if one
> doesn't have an EmbeddedICE connected.

Thanks for your suggestion. The long stall during boot problem occurs
on Samsung boards as well with linux-next. As per your suggestion, the
following diff fixes this issue.

diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 65cf8c6..035f5cd 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -120,6 +120,15 @@ choice
 		  Say Y here if you want the debug print routines to direct
 		  their output to the second serial port on these devices.

+	config DEBUG_SAMSUNG_UART
+		bool "Kernel low-level debugging messages via samsung serial port"
+		depends on PLAT_SAMSUNG
+		help
+		  Say Y here if you want the debug print routines to direct
+		  their output to the serial port for Samsung platforms. Choose
+		  the uart port with the "S3C UART to use for low-level debug"
+		  config option.
+
 endchoice

 config EARLY_PRINTK
@@ -139,7 +148,7 @@ config OC_ETM
 	  kernel code.

 config DEBUG_S3C_UART
-	depends on PLAT_SAMSUNG
+	depends on DEBUG_SAMSUNG_UART
 	int "S3C UART to use for low-level debug"
 	default "0"
 	help


Thanks,
Thomas.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/