Re: [patch] genapic: optimize & fix APIC mode setup

[Ingo Molnar]

* Andi Kleen <ak@xxxxxxx> wrote:

> Now if it causes device driver issues that's different of course. I 
> wasn't aware of this before.

lets try my patch in -mm for a while.

Had i ever noticed this hack in the first place i would have NAK-ed it. 
There is a fundamental design friction of a high-level feature like 
HOTPLUG_CPU /requiring/ a fundamental change to the lowlevel IRQ 
delivery mode! Such a requirement is broken and just serves to hide a 
flaw in the hotplug design - which flaw would trigger on i386 /anyway/, 
because i386 still uses logical delivery mode for APIC IPIs. Also, i'd 
like to have a description of how to reproduce those CPU hotplug 
problems, so that i can try to fix it.

	Ingo
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