Re: Config NO_BOOTMEM breaks my amd64 box

[Ingo Molnar <mingo@elte.hu>]

* James Morris <jmorris@namei.org> wrote:

> On Wed, 31 Mar 2010, Ingo Molnar wrote:
> 
> > > 
> > > Yes, it was happening with -rc3.
> > 
> > Could you please send the bootlog that Yinghai asked for, plus also one that 
> > you get with NO_BOOTMEM turned off (for comparison)?
> 
> I don't have the old boot logs, and have since upgraded the system 
> further.  

Please, could you send any bootlog then that we could work from? That way we 
could check the memory layout and guess the rough shape of the early 
allocations, etc.

> IIRC, the boot was failing after not being able to find the root fs 
> (ext3/lvm/raid0).  I thought it was a dracut issue, but it seemed to be 
> fixed by enabling bootmem.

Ok - initrd unpack failing or initial mount failing is consistent with the 
initrd getting corrupted by overlapping early reservations due to allocator 
bug.

> > Also, when did you first hit this bug? This code has been upstream for 
> > almost a month, and it was in linux-next before that - so you should have 
> > hit this much sooner. A rough timeframe would suffice. I suppose you were 
> > booting upstream kernels during the merge window as well?
> 
> In this case, in the last few days (also when I first saw or noticed the 
> bootmem option).  I was booting relatively recent linus kernels during the 
> merge window, although my main work was being done on an older upstream 
> kernel.

Ok, so it's not an old regression but possibly a bug in one of the fixes. Not 
good.

	Ingo