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Re: [Xen-devel] [PATCH v5 4/9] x86/traps: Enable all exception handler callbacks early

On Sun, Apr 03, 2016 at 06:55:00AM -0700, Andy Lutomirski wrote:
> > No, please don't fail at early boot.
> >
> > Early boot is just about the *worst* situation to try to debug odd
> > failures, exactly since things like printk may not be reliable, and
> > things won't get logged etc.
> >
> > So particularly during early boot we should try as hard as possible
> > not to crash - even if it means not being able to log about a problem.
> > At least that way you have a hopefully working machine and can *maybe*
> > debug things.
> >
> In this regard, at least, my patch is the right approach.  Calling the
> handler, whatever it is, is less likely to panic than refusing to call
> it.

Ok, good.

But can we pretty please document this whole situation, i.e., the
fact that we're trying really really hard not to fail early boot for
debuggability reasons - either in the commit message or better in the
code, for future reference. I think this is an important aspect to hold



ECO tip #101: Trim your mails when you reply.

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