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SubjectRe: Linus BK tree crashes with PANIC: INIT: segmentation violation
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Linus,

Linus Torvalds <torvalds@transmeta.com> writes:

> > 1) PANIC: INIT: ...
> > 2) String of Oopses
> > 3) Working Tree.
> >
> > The changeover from 2-3 is approximately December 30 (see my previous
> > post).
>
> I was hoping for a exact changset, your post didn't seem to be 100% sure.

The 'String of oopses' was a red herring. It was fixed sometime in early
January. The PANIC: INIT: problem, however, is real, and was introduced
by the following ChangeSet on January 7:

D 1.972 03/01/07 10:08:55-08:00 torvalds@home.transmeta.com 15824 15815 2/0/1
P ChangeSet
C Move x86 signal handler return stub to the vsyscall page,
C and stop honoring the SA_RESTORER information.
C
C This will prepare us for alternate signal handler returns.

If I build a kernel WITH this changeset it fails; if I build a kernel
at 1.971 (bjorn_helgaas's i810/i830 AGP patches) the kernel works just
fine.

So, something in your changes to kernel/sysenter.c or kernel/signal.c
causes INIT to PANIC and fail.

So, what would you like me to test, now?

-derek

--
Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
Member, MIT Student Information Processing Board (SIPB)
URL: http://web.mit.edu/warlord/ PP-ASEL-IA N1NWH
warlord@MIT.EDU PGP key available
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