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Re: [Qemu-devel] [PATCH v7.5] kvm: notify host when the guest is panicke
From: |
Sasha Levin |
Subject: |
Re: [Qemu-devel] [PATCH v7.5] kvm: notify host when the guest is panicked |
Date: |
Sun, 22 Jul 2012 13:39:57 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120713 Thunderbird/13.0 |
On 07/21/2012 10:44 AM, Wen Congyang wrote:
> We can know the guest is panicked 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 panicked. If management
> app does not do auto dump, the guest's user can do dump by hand if
> he sees the guest is panicked.
>
> We have three solutions to implement this feature:
> 1. use vmcall
> 2. use I/O port
> 3. use virtio-serial.
>
> We have decided to avoid touching hypervisor. The reason why I choose
> choose the I/O port is:
> 1. it is easier to implememt
> 2. it does not depend any virtual device
> 3. it can work when starting the kernel
Was the option of implementing a virtio-watchdog driver considered?
You're basically re-implementing a watchdog, a guest-host interface and a set
of protocols for guest-host communications.
Why can't we re-use everything we have now, push a virtio watchdog driver into
drivers/watchdog/, and gain a more complete solution to detecting hangs inside
the guest.
- [Qemu-devel] [PATCH v7] kvm: notify host when the guest is panicked, Wen Congyang, 2012/07/21
- [Qemu-devel] [PATCH 1/6 v7] start vm after reseting it, Wen Congyang, 2012/07/21
- [Qemu-devel] [PATCH 2/6 v7] kvm: Update kernel headers, Wen Congyang, 2012/07/21
- [Qemu-devel] [PATCH 3/6 v7] add a new runstate: RUN_STATE_GUEST_PANICKED, Wen Congyang, 2012/07/21
- [Qemu-devel] [PATCH 4/6 v7] add a new qevent: QEVENT_GUEST_PANICKED, Wen Congyang, 2012/07/21
- [Qemu-devel] [PATCH 5/6 v7] introduce a new qom device to deal with panicked event, Wen Congyang, 2012/07/21
- [Qemu-devel] [PATCH 6/6 v7] allow the user to disable pv event support, Wen Congyang, 2012/07/21
- Re: [Qemu-devel] [PATCH v7] kvm: notify host when the guest is panicked, Jan Kiszka, 2012/07/21
- [Qemu-devel] [PATCH v7.5] kvm: notify host when the guest is panicked, Wen Congyang, 2012/07/21
- Re: [Qemu-devel] [PATCH v7.5] kvm: notify host when the guest is panicked,
Sasha Levin <=
- Re: [Qemu-devel] [PATCH v7.5] kvm: notify host when the guest is panicked, Anthony Liguori, 2012/07/22
- Re: [Qemu-devel] [PATCH v7.5] kvm: notify host when the guest is panicked, Sasha Levin, 2012/07/22
- Re: [Qemu-devel] [PATCH v7.5] kvm: notify host when the guest is panicked, Anthony Liguori, 2012/07/22
- Re: [Qemu-devel] [PATCH v7.5] kvm: notify host when the guest is panicked, Sasha Levin, 2012/07/22
- Re: [Qemu-devel] [PATCH v7.5] kvm: notify host when the guest is panicked, Wen Congyang, 2012/07/22
- Re: [Qemu-devel] [PATCH v7.5] kvm: notify host when the guest is panicked, Wen Congyang, 2012/07/22
Re: [Qemu-devel] [PATCH v7] kvm: notify host when the guest is panicked, Sasha Levin, 2012/07/21