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Re: [Qemu-devel] [PATCH 0/2 v3] kvm: notify host when guest panicked
From: |
Wen Congyang |
Subject: |
Re: [Qemu-devel] [PATCH 0/2 v3] kvm: notify host when guest panicked |
Date: |
Tue, 17 Apr 2012 11:14:46 +0800 |
User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.9) Gecko/20100413 Fedora/3.0.4-2.fc13 Thunderbird/3.0.4 |
At 03/20/2012 11:45 PM, Gleb Natapov Wrote:
> On Tue, Mar 20, 2012 at 05:59:16PM +0800, Wen Congyang wrote:
>> At 03/19/2012 03:33 PM, Wen Congyang Wrote:
>>> At 03/08/2012 03:57 PM, Wen Congyang Wrote:
>>>> We can know the guest is paniced when the guest runs on xen.
>>>> But we do not have such feature on kvm.
>>>>
>>>> Another purpose of this feature is: management app(for example:
>>>> libvirt) can do auto dump when the guest is crashed. If management
>>>> app does not do auto dump, the guest's user can do dump by hand if
>>>> he sees the guest is paniced.
>>>>
>>>> I touch the hypervisor instead of using virtio-serial, because
>>>> 1. it is simple
>>>> 2. the virtio-serial is an optional device, and the guest may
>>>> not have such device.
>>>>
>>>> Changes from v2 to v3:
>>>> 1. correct spelling
>>>>
>>>> Changes from v1 to v2:
>>>> 1. split up host and guest-side changes
>>>> 2. introduce new request flag to avoid changing return values.
>>>> --
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>>>> Please read the FAQ at http://www.tux.org/lkml/
>>>>
>>>
>>>
>>> Hi all:
>>>
>>> we neet this feature, but we don't decide how to implement it.
>>> We have two solution:
>>> 1. use vmcall
>>> 2. use virtio-serial.
>>>
>>> I will not change this patch set before we decide how to do it.
>>> Can we make a decision recent days?
>>
>> Anybody can decide which solution to use?
>>
> To make an informed decision we need to have at least raw idea how
> virtio-serial variant will look.
We have three solutions now:
1. use vmcall
2. use I/O port
3. use virtio-serial
I write a sample patch of solution 2 and 3:
patch 1: solution 2
patch 2: solution 3
Note, ther are only sample patches, and it can work. I send them, so we
can decide which solution will be used.
Thanks
Wen Congyang
>
> --
> Gleb.
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to address@hidden
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
>
0001-kvm-notify-host-when-guest-panicked.patch
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0002-kvm-notify-host-when-guest-panicked.patch
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