On Friday 08 September 2006 12:40, Mel Gorman wrote:
> On Thu, 7 Sep 2006, keith mannthey wrote:
> > On Thu, 2006-09-07 at 11:20 -0700, keith mannthey wrote:
> >> Hello,
> >> I was booting rc4-mm3. With rc5-mm1 I am hanging early... Mel I don't
> >> know if this is related to your code but I will soon know. (I don't get
> >> your debug info in early console.)
> >> I was working on patches for the reserve based memory hot add path in
> >> srat.c (the initial error is fixed by Mels patches but there is more to
> >> do)
>
> That is some good news at least.
>
> > and was just moving to rc5-mm1 to sync up and then more trouble.
> >
> >> This is with reserve based hot-add not enabled at the command line.
> >
> > Well this isn't fully adding up but here is what I found.
> >
> > If I drop
> > x86_64-mm-drop-640k-reservation.patch
> > x86_64-mm-remove-e820-fallback.patch
> > and
> > x86_64-mm-remove-e820-fallback-fix.patch
> >
> > I build and boot. All files in the series upto x86_64-mm-drop-640k-
> > reservation.patch work just fine. Dropping this patch makes things
> > better. The e820 patches were removed to make the rest of the series
> > apply.
>
> I am having trouble reproducing this. However, I recently got access to a
> machine similar to yours. I can say that sometimes the stability of
> 2.6.18-rc4-mm3 and 2.6.18-rc5-mm1 was totally useless (but the symptons
> different to yours) and the box would easily crash for reasons I could not
> pin down. As stability problems had been reported on the machine earlier
> by other users, I was inclined to blame the hardware. Now I'm not sure.
>
> > It is not clear what changes would cause me to die setting up the
> > bootmem allocator on my first node...
>
> Unless your machine really has something special in the low 640K that is
> required and bad things happen if it's written to at a bad time.
That would be a BIOS bug then. If anything is there it has to be reserved.
But maybe it just breaks something that only worked by accident before.
-Andi
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