linux-kernel - Re: Serial related oops

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Date:	Thu, 01 Mar 2007 15:24:34 +0000
From:	Jose Goncalves <jose.goncalves@...v.pt>
To:	Jose Goncalves <jose.goncalves@...v.pt>,
	Frederik Deweerdt <deweerdt@...e.fr>,
	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: Serial related oops

Russell King wrote:
> On Thu, Mar 01, 2007 at 01:33:28PM +0000, Jose Goncalves wrote:
>   
>> I've also done your suggestion and I've inserted "msleep(10);" just
>> before the "And clear the interrupt registers again for luck." and my
>> application is now running without problems fore more than 24H! So,
>> inserting a delay in this point definitely makes some difference (has
>> was with adding some extra printk() in several points of
>> serial8250_startup()).
>>
>> This said, for me, this is definitely a software problem. The question
>> is were?
>>     
>
> I'm personally convinced it's hardware because according to my analysis
> your CPU behaving in a way that the code is not asking it to do so.
>   

It's not possible that a interrupt is hitting just after enabling
interrupts with "serial_outp(up, UART_IER, up->ier);" which triggers the
execution of some code that is not reported by the Oops dump (at least
with my current configuration) ?

José Gonçalves

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