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SubjectRe: kexec reboot code buffer
Dave Hansen <> writes:

> Eric W. Biederman wrote:
> > Dave Hansen <> writes:
> >>On my system, it appears to lock up in:
> >>kimage_alloc_reboot_code_pages()
> >>after the kexec -l.
> >
> >
> > O.k. It should come out of it eventually from what I have
> > seen described, the current algorithm is definitely inefficient on
> > your machine.
> It does appear to completely hang in the free loop. Something funny is
> happening there. I'll try to provide more details later. BTW, do you
> mind updating your patches for 2.5.59?

I will give it a shot shortly I have been intensely busy just
lately so find the free second is a bit difficult. At the same

> I'm having some other problems
> and I want to make sure it isn't my bad merging that's at fault :)

I don't recall any merging issues at all with the stock kernel, just
a some slight line changes.
> > And being able to allocate from 3GB instead of just 1GB is
> > much more polite. The question then is how do I specify the zones
> > properly.
> Actually, I think that using lowmem is OK. The machine is going away
> soon anyway, and the necessary memory is a very small portion,
> especially on a machine with this much RAM.

I agree that lowmem for the common case is fine. For kexec on panic,
and a some weird cases using high mem is beneficial. I don't have
a problem with changing it back to just lowmem for the time being.

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