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Re: [Qemu-devel] [RFC] Introduce vm_stop_permanent()
From: |
Jan Kiszka |
Subject: |
Re: [Qemu-devel] [RFC] Introduce vm_stop_permanent() |
Date: |
Thu, 28 Jul 2011 16:19:19 +0200 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666 |
On 2011-07-28 15:37, Avi Kivity wrote:
> On 07/28/2011 04:31 PM, Luiz Capitulino wrote:
>> On Thu, 28 Jul 2011 10:23:22 +0300
>> Avi Kivity<address@hidden> wrote:
>>
>> > On 07/28/2011 12:44 AM, Blue Swirl wrote:
>> > > On Wed, Jul 27, 2011 at 9:42 PM, Luiz
>> Capitulino<address@hidden> wrote:
>> > > > This function should be used when the VM is not supposed to
>> resume
>> > > > execution (eg. by issuing 'cont' monitor command).
>> > > >
>> > > > Today, we allow the user to resume execution even when:
>> > > >
>> > > > o the guest shuts down and -no-shutdown is used
>> > > > o there's a kvm internal error
>> > > > o loading the VM state with -loadvm or "loadvm" in the
>> monitor fails
>> > > >
>> > > > I think only badness can happen from the cases above.
>> > >
>> > > I'd suppose a system_reset should bring the system back to
>> sanity and
>> > > then clear vm_permanent_stopped (where's -ly?)
>>
>> What's -ly?
>>
>
> permanent-ly.
>
>> > > except maybe for KVM
>> > > internal error if that can't be recovered. Then it would not very
>> > > permanent anymore, so the name would need adjusting.
>> >
>> > Currently, all kvm internal errors are recoverable by reset (and
>> > possibly by fiddling with memory/registers).
>>
>> Ok, but a poweroff in the guest isn't recoverable with system_reset
>> right? Or does it depend on the guest?
>
> Right, it's not recoverable if you shut the power down where the tractor
> beam is coupled to the main reactor.
system_reset will bring all emulated devices back into their power-on
state - unless we have remaining bugs to fix. Actually, one may consider
issuing this reset automatically on vm_start after "permant" vm_stop.
Jan
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- [Qemu-devel] [RFC] Introduce vm_stop_permanent(), Luiz Capitulino, 2011/07/27
- Re: [Qemu-devel] [RFC] Introduce vm_stop_permanent(), Blue Swirl, 2011/07/27
- Re: [Qemu-devel] [RFC] Introduce vm_stop_permanent(), Avi Kivity, 2011/07/28
- Re: [Qemu-devel] [RFC] Introduce vm_stop_permanent(), Luiz Capitulino, 2011/07/28
- Re: [Qemu-devel] [RFC] Introduce vm_stop_permanent(), Avi Kivity, 2011/07/28
- Re: [Qemu-devel] [RFC] Introduce vm_stop_permanent(),
Jan Kiszka <=
- Re: [Qemu-devel] [RFC] Introduce vm_stop_permanent(), Luiz Capitulino, 2011/07/28
- Re: [Qemu-devel] [RFC] Introduce vm_stop_permanent(), Jan Kiszka, 2011/07/28
- Re: [Qemu-devel] [RFC] Introduce vm_stop_permanent(), Luiz Capitulino, 2011/07/28
- Re: [Qemu-devel] [RFC] Introduce vm_stop_permanent(), Luiz Capitulino, 2011/07/28
- Re: [Qemu-devel] [RFC] Introduce vm_stop_permanent(), Jan Kiszka, 2011/07/28
- Re: [Qemu-devel] [RFC] Introduce vm_stop_permanent(), Luiz Capitulino, 2011/07/28
- Re: [Qemu-devel] [RFC] Introduce vm_stop_permanent(), Jan Kiszka, 2011/07/28
- Re: [Qemu-devel] [RFC] Introduce vm_stop_permanent(), Luiz Capitulino, 2011/07/28
- Re: [Qemu-devel] [RFC] Introduce vm_stop_permanent(), Alon Levy, 2011/07/28
- Re: [Qemu-devel] [RFC] Introduce vm_stop_permanent(), Blue Swirl, 2011/07/30