Re: [PATCH] debug: allow to retain boot console via boot option keep_bootcon

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 01/10/2011 11:11 PM, David Miller wrote:
> From: "Fabio M. Di Nitto" <fabbione@xxxxxxxxxxxx>
> Date: Mon, 10 Jan 2011 09:58:03 +0100
> 
>> On some architectures, the boot process involves de-registering the boot
>> console (early boot), initialize drivers and then re-register the console.
>>
>> This mechanism introduces a window in which no printk can happen on the console
>> and messages are buffered and then printed once the new console is available.
>>
>> If a kernel crashes during this window, all it's left on the boot console
>> is "console [foo] enabled, bootconsole disabled" making debug of the crash
>> rather 'interesting'.
>>
>> By adding "keep_bootcon" option, do not unregister the boot console, that
>> will allow to printk everything that is happening up to the crash.
>>
>> The option is clearly meant only for debugging purposes as it introduces lots
>> of duplicated info printed on console, but will make bug report from users
>> easier as it doesn't require a kernel build just to figure out where we crash.
>>
>> Signed-off-by: Fabio M. Di Nitto <fabbione@xxxxxxxxxxxx>
> 
> Acked-by: David S. Miller <davem@xxxxxxxxxxxxx>

Thanks! David, is it an option for you to push it around together with
other sparc fixes or should I just submit it to kernel list? Either ways
work for me.

Fabio
--
To unsubscribe from this list: send the line "unsubscribe sparclinux" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [Kernel Development]     [DCCP]     [Linux ARM Development]     [Linux]     [Photo]     [Yosemite Help]     [Linux ARM Kernel]     [Linux SCSI]     [Linux x86_64]     [Linux Hams]

  Powered by Linux