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xen-devel
[Xen-devel] Re: [RFC][PATCH 08/10] x86: Don't ack_APIC_irq() if lapic is
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To: |
Sheng Yang <sheng@xxxxxxxxxxxxxxx>, Keir Fraser <keir.fraser@xxxxxxxxxxxxx>, Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>, Jun Nakajima <jun.nakajima@xxxxxxxxx>, Eddie Dong <eddie.dong@xxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx> |
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Subject: |
[Xen-devel] Re: [RFC][PATCH 08/10] x86: Don't ack_APIC_irq() if lapic is disabled in GENERIC_INTERRUPT_VECTOR handler |
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From: |
Cyrill Gorcunov <gorcunov@xxxxxxxxx> |
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Date: |
Wed, 16 Sep 2009 13:03:06 +0400 |
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Wed, 16 Sep 2009 02:07:30 -0700 |
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[Cyrill Gorcunov - Wed, Sep 16, 2009 at 12:58:35PM +0400]
...
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| Hi Sheng,
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| is there was some problem with it? I'm asking you
| because if disable_apic=1 then any apic write/read
| operations become NOPs. So I don't see how it may
| hurt. But I could be missing something.
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| -- Cyrill
Ah, I see -- it's due to your other patch...
Hmm this makes all "disable apic" idea less
general. And safety of ack_APIC_irq is now
under suspicious.
-- Cyrill
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