Re: [crash, bisected] Re: [PATCH 3/4] x86_64: Fold pda into per cpu area

Eric W. Biederman wrote:
Mike Travis <travis@xxxxxxx> writes:

Unfortunately it's back to the problem of faulting before x86_64_start_kernel()
and grub just immediately reboots. So I'm back at analyzing assembler and
config differences.

Ok. That is a narrow window of code. So it shouldn't be too bad, nasty though.

If you would like to trace through it I have attached my serial port
debugging routines that I use in that part of the code.

Last time it was doing this, it was a result of a triple-fault caused by loading %ds with an all-zero gdt. I modified Xen to dump the CPU state on triple-faults, so it was easy to pinpoint. I can do that again if it helps.

J
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/