linux-kernel - Re: 2.6.19-rc6-rt4, changed yum repository

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Date:	Sun, 19 Nov 2006 14:43:01 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Karsten Wiese <fzu@...gehoertderstaat.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: 2.6.19-rc6-rt4, changed yum repository


* Karsten Wiese <fzu@...gehoertderstaat.de> wrote:

> work_resched:
> 	DISABLE_INTERRUPTS
> 	call __schedule
> 					# make sure we don't miss an interrupt
> 					# setting need_resched or sigpending
> 					# between sampling and the iret
> 	movl TI_flags(%ebp), %ecx
> 	andl $_TIF_WORK_MASK, %ecx	# is there any work to be done other
> 					# than syscall tracing?
> 	jz restore_all
> 	testl $(_TIF_NEED_RESCHED|_TIF_NEED_RESCHED_DELAYED), %ecx
> 	jnz work_resched
> 
> The hwclock page_fault happens at the
>  	movl TI_flags(%ebp), %ecx
> line.

hm, weird - maybe something corrupts %ebp here? Could you try to add 
this to before the faulting instruction:

	GET_THREAD_INFO(%ebp)

this will make sure %ebp has the right contents.

	Ingo
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