On Wed, Apr 23, 2008 at 08:35:47AM -0700, Randy Dunlap wrote:
> On Tue, 22 Apr 2008 21:20:44 -0300 (GFT) werner wrote:
>
> > As I tested yesterday extensively, the problem wasn't present at 2.6.24-rc5-git6 (SYS Linux 0.17 install DVD) nor at 2.6.24-rc6-git2 (SYS 0.19) , but at 2.6.24-rc6-git8 (SYS 0.20-rc1 and 0.20-rc2) and 2.6.25 (0.21-r3).
> >
> > The whole compiled packages of these kernels still are at copaya.yi.org/tgz , but I extracted the important parts, see enclosed here. The .tar.bz2 file contains the config and the protocoll of the compilation (inclusive warning / error messages).
> >
> > As you can see, the diff between the config of 2.6.24-rc6-git2 and -git8 is nothing. That means: THE ERROR ENTERED INTO THE KERNEL BETWEEN THESE TWO GITs !!

>
> Hi,
> I'm a little confused.
>
> Is this supposed to be "between 2.6.25-rc6-git2 and 2.6.25-rc6-git8"?
> You say 2.6.24-rc6-git*. I just want to make sure of which patch
> interval we are looking at.


It's definitely .24 given the dates for the SYS releases he notes. The
diffstat between the two is relatively short [1], but I can't see
anything that can be related. This code runs so early, during real
mode startup, that my only suspects are:

arch/x86/kernel/head_32.S | 2 +-
arch/x86/kernel/smpboot_64.c | 2 +-
include/asm-generic/tlb.h | 3 -
include/asm-x86/byteorder.h | 4 +-
include/asm-x86/msr.h | 74 +++++++++--------



[1] http://domsch.com/linux/edd-bug-2008-04-26.patch

but none of those are obviously the culprit to me...

Werner, the initcall_debug trace would be most helpful; without that
I'm not sure how much progress we can make on this.

Thanks,
Matt

--
Matt Domsch
Linux Technology Strategist, Dell Office of the CTO
linux.dell.com & www.dell.com/linux
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