Re: [bisected] 2.6.31 regression: fails to boot as xen guest

[Jeremy Fitzhardinge]

On 08/25/09 11:43, Pekka Enberg wrote:
> Aha, the previous patch worked because I #ifdef the WP test completely.
> Jeremy, the root cause here is that we do the WP test much earlier than
> before. Even with the test moved to trap_init(), we do it early compared
> to what we did before.
>
> I guess Xen is not prepared to handle traps this early in the boot
> sequence? Can we fix that?
>   

The crash is in the event (interrupt) path, which shouldn't be involved
in trap handling at all.  I'm wondering if interrupts are getting
enabled as a side-effect of handling the trap.

    J
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