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xen-devel
RE: [Xen-devel] [PATCH] Fix hvm vcpu hotplug bug
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To: |
"Liu, Jinsong" <jinsong.liu@xxxxxxxxx> |
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Subject: |
RE: [Xen-devel] [PATCH] Fix hvm vcpu hotplug bug |
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From: |
Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx> |
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Date: |
Wed, 18 Aug 2010 14:53:48 +0100 |
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Cc: |
"Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "Li, Xin" <xin.li@xxxxxxxxx>, Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
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Wed, 18 Aug 2010 06:54:32 -0700 |
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Liu, Jinsong writes ("RE: [Xen-devel] [PATCH] Fix hvm vcpu hotplug bug"):
> I think qemu-xen should add this logic level, so that it can support
> more gpe events in the future.
Yes. But what clears the interrupt ? Is it edge or level triggered ?
> BTW, at qemu-kvm, it do same as our current patch:
> qemu_set_irq(sci_irq, 1);
> qemu_set_irq(sci_irq, 0);
> it triggers a sci pulse and works fine.
If this works fine it is just lucky, I think. It has the same race as
the one you've identified. Batching up the different events is just a
way to make the race probably not happen in that particular case.
Ian.
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- [Xen-devel] [PATCH] Fix hvm vcpu hotplug bug, Liu, Jinsong
- Re: [Xen-devel] [PATCH] Fix hvm vcpu hotplug bug, Ian Jackson
- RE: [Xen-devel] [PATCH] Fix hvm vcpu hotplug bug, Liu, Jinsong
- RE: [Xen-devel] [PATCH] Fix hvm vcpu hotplug bug,
Ian Jackson <=
- RE: [Xen-devel] [PATCH] Fix hvm vcpu hotplug bug, Liu, Jinsong
- RE: [Xen-devel] [PATCH] Fix hvm vcpu hotplug bug, Ian Jackson
- RE: [Xen-devel] [PATCH] Fix hvm vcpu hotplug bug, Liu, Jinsong
- RE: [Xen-devel] [PATCH] Fix hvm vcpu hotplug bug, Ian Jackson
- RE: [Xen-devel] [PATCH] Fix hvm vcpu hotplug bug, Liu, Jinsong
- RE: [Xen-devel] [PATCH] Fix hvm vcpu hotplug bug, Ian Jackson
- RE: [Xen-devel] [PATCH] Fix hvm vcpu hotplug bug, Liu, Jinsong
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