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    SubjectRe: [PATCH 4/9] x86, NMI: Remove DIE_NMI_IPI and add priorties to handlers
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    On Wed, 2010-12-01 at 21:41 +0300, Cyrill Gorcunov wrote:
    > On Tue, Nov 30, 2010 at 05:27:25PM -0500, Don Zickus wrote:
    > > When re-ordering how the NMI handles its callbacks, a conversation started
    > > asking what DIE_NMI_IPI meant. No one could answer it.
    >
    > It should have came from commit
    >
    > | commit c4b2bffee2a4115fed2825530f2b906ee2f17bd7
    > | Author: Andi Kleen <ak@suse.de>
    > | Date: Fri Jan 23 18:46:40 2004 -0800
    > |
    > | [PATCH] x86-64 merge
    > |
    > | Mainly lots of bug fixes and a few minor features. One change is that
    > | it uses drivers/Kconfig now like i386. This requires a few minor changes in
    > | outside Kconfig files which I am sending separately.
    > ...
    >
    > Andi do you remember what the initial idea was? Didn't find any user of it
    > even in this old commit. Just curious.
    >
    > >
    > > Noticing that is was wasteful to call the die_chain a second time with just
    > > another argument, DIE_NMI_IPI, it was decided to nuke it and add priorities
    > > to the die_chain handlers to maintain existing behaviour.
    > >
    > > This patch replaces DIE_NMI_IPI with the appropriate option, mostly DIE_NMI.
    > > Then it adds priorities to those handlers, using a globally defined set of
    > > priorities for NMI.
    > >
    > > The thought is eventually we will just switch the nmi handlers from the
    > > die_chain to something more nmi specific.
    > >
    > > Signed-off-by: Don Zickus <dzickus@redhat.com>
    > > ---
    >
    > Don, maybe switching to say new chains like chain_perf and friends would be
    > more readable/clean? I'm not against this patch by any means, but just a thought ;)

    Its a single event (NMI) so we only need a single notifier list, the
    current one seems to be just fine.



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