Re: Bisected regression (Was Re: current -git fails to boot on nehalem-ex)

Ingo Molnar
2009-12-10T16:07:00Z

* Jens Axboe <jens.axboe@oracle.com> wrote:

> On Thu, Dec 10 2009, Jens Axboe wrote:
> > Hi,
> >
> > As written in the subject, it just hard hangs before writing anything on
> > the console. With earlyprintk, I captured the failure, see below.
> >
> > I'll try and bisect this, but it takes some time (since the bios and
> > post process takes forever). I just updated the firmware on the box as
> > well, but it did boot 2.6.32 (and RHEL5 boots fine too). Of course that
> > doesn't rule out a BIOS bug.
>
> Results are persistent, git bisect points to:
>
> commit b24c2a925a9837cccf54d50aeac22ba0cbc15455
> Author: Yinghai Lu <yinghai@kernel.org>
> Date: Tue Nov 24 02:48:18 2009 -0800
>
> x86: Move find_smp_config() earlier and avoid bootmem usage
>
> which appears consistent with the panic(). Reverting that does indeed
> make current -git boot properly.

Thanks. Yinghai, do you have any ideas, or should we revert it?

Ingo