Messages in this thread | | | Date | Mon, 13 Nov 2006 09:16:16 +0100 | From | Ingo Molnar <> | Subject | Re: [patch] genapic: optimize & fix APIC mode setup |
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* Andi Kleen <ak@suse.de> 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.
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