Hash: SHA512

On 2017-03-18 09:24, Grzegorz Chodzicki wrote:
> On 03/18/2017 05:21 PM, Unman wrote:
>> On Sat, Mar 18, 2017 at 08:59:29AM -0700, Grzesiek Chodzicki wrote:
>>> W dniu sobota, 18 marca 2017 15:08:35 UTC+1 użytkownik Unman napisał:
>>>> On Sat, Mar 18, 2017 at 03:41:49AM -0700, Grzesiek Chodzicki wrote:
>>>>> I've experienced this issue myself and I saw some people complaining 
>>>>> about it on the mailing list. Sometimes Qubes takes forever to poweroff.
>>>>> The issue is caused by the fact that for some unknown reason machines 
>>>>> with PCI devices attached take forever to shutdown and sometimes need to 
>>>>> be manually killed from within VM Manager. After manually killing them, 
>>>>> the system will shutdown normally.
>>>>> So, here's the fix:
>>>>> In Dom0 run qvm-prefs -s sys-net pci_e820_host false
>>>>> Repeat that for sys-usb and any other machine that holds a PCI device.
>>>>> Your system should shut down normally after this.
>>>>> No, I don't know how or why this works but I know that it solved the 
>>>>> issue on my machine. Explanation welcome. I'll add this to documentation 
>>>>> once we have a confirmation that this is 100% reproducible.
>>>> I'd be reluctant to propose this as a tip as is, because it will almost
>>>> certainly break networking for some users.
>>>> We specifically set pci_e820 to address user problems. I don't know what
>>>> the intersection is between those for whom this is a fix and those for
>>>> whom shutdown is slow/doesn't happen.
>>>> Have you tried the solution suggested here before of shutting down other
>>>> vms first, then sys-usb and sys-net? Andrew, I think, posted a simple
>>>> script that he uses.

Yeah, here it is:


(And also in the ML archives.)

>>>> I suspect that that will have more impact with
>>>> fewer consequences than this proposal, but user experience will be key
>>>> here: comments ?
>>> Yes, I did try that, this is how I found out that on my system it is not 
>>> possible to cleanly shut down VMs that hold PCI devices. If I try shutting 
>>> down sys-net the VM Manager hangs for a few minutes, then the entire system 
>>> stops responding then the machine gets killed, then VM manager throws an 
>>> exception and then system becomes responsive again. After setting 
>>> pci_e820_host to False I can cleanly shutdown sys-net and sys-usb just like 
>>> any other VM.
>> So that sounds very system specific. Why not put together a tip
>> incorporating Andrew's script ( which will help on almost all
>> machines), and then yours as a special case to be used where that
>> doesnt help?
> That's the point, I don't know whether this is specific to my machine
> but I don't have another PC to test so I posted this here so other
> people can try it and see if that alleviates the issue.

What if you just qvm-kill sys-net?

- -- 
Andrew David Wong (Axon)
Community Manager, Qubes OS


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