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    SubjectRe: [PATCH] x86: Construct 32 bit boot time page tables in native format.
    Hi!

    > > > >>I just looked at the ACPI suspend code, and it looks
    > > > >>like it hacks its own identity map at runtime. Pavel,
    > > > >>am I reading that code right?
    > > > >
    > > > >Yes, I think so, I believe we do it on both 32 and 64
    > > > >bit now.
    > > > >
    > > >
    > > > So the background to this... we need an identity map to
    > > > trampoline at early boot, obviously, but we'd like it to
    > > > not stick around more than necessary. We have
    > > > zap_low_mappings() now but it's not really sufficient.
    > > >
    > > > Secondary SMP processors need these mappings during
    > > > trampolining -- presumably including CPU hotplug -- and
    > > > I'm suspecting it might simply make sense to use a
    > > > separate set of page tables (with both the identity and
    > > > the kernel map) for trampolining and just keep them
    > > > around. That way they would be usable for ACPI as well.
    > >
    > > That would enable some cleanups, yes.
    >
    > Speaking of cleanups, the following one is applicable IMO.

    ACK... and BTW ack for that deferred device removal series.

    Pavel
    --
    (english) http://www.livejournal.com/~pavelmachek
    (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html


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