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Date:      Sat, 14 Dec 2013 15:23:01 -0800
From:      Neel Natu <neelnatu@gmail.com>
To:        Markiyan Kushnir <markiyan.kushnir@gmail.com>
Cc:        FreeBSD current <freebsd-current@freebsd.org>, "freebsd-virtualization@freebsd.org" <freebsd-virtualization@freebsd.org>
Subject:   Re: 11.0-CURRENT panic while running a bhyve instance
Message-ID:  <CAFgRE9GJnkeQ%2BncoeZ8-bQM3_1OqHg_%2BQyVtNZg=Xzn3xHc7kQ@mail.gmail.com>
In-Reply-To: <CACvtUJfLYYfHOGDXZpZRgDyB4E4BhuWYL=Nr5ZqrkqFi6NrG-g@mail.gmail.com>
References:  <CACvtUJdtc_aZxmNjz=5UWuBP8DQb%2BGwioTZaPjuqPVsJbRkjcw@mail.gmail.com> <201312131304.57455.jhb@freebsd.org> <CACvtUJcoe=XXC5wJ7QciccuTcguXk6u=f13EHiXDcObhXP7r1A@mail.gmail.com> <CAFgRE9EmZr8f52Mp4tG25zWOOQLitvtFmJOfib55K_qi9e9ztA@mail.gmail.com> <CACvtUJeh67hKE2Cw8c37WsE=PcY03N4ntBDJYmMx8GW7GW7bAg@mail.gmail.com> <CACvtUJfXLhZeVS7QFos7JPZLPtNJ4oFHJY0ONXOgsaXifDg=bw@mail.gmail.com> <CACvtUJfLYYfHOGDXZpZRgDyB4E4BhuWYL=Nr5ZqrkqFi6NrG-g@mail.gmail.com>

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Hi Markiyan,

On Sat, Dec 14, 2013 at 6:00 AM, Markiyan Kushnir
<markiyan.kushnir@gmail.com> wrote:
> 2013/12/14 Markiyan Kushnir <markiyan.kushnir@gmail.com>:
>> 2013/12/14 Markiyan Kushnir <markiyan.kushnir@gmail.com>:
>>> 2013/12/14 Neel Natu <neelnatu@gmail.com>:
>>>> Hi Markiyan,
>>>>
>>>> On Fri, Dec 13, 2013 at 2:35 PM, Markiyan Kushnir
>>>> <markiyan.kushnir@gmail.com> wrote:
>>>>> 2013/12/13 John Baldwin <jhb@freebsd.org>:
>>>>>> On Friday, December 13, 2013 5:46:20 am Markiyan Kushnir wrote:
>>>>>>> Forgot to fill the Subject: header, re-posting it fixed.
>>>>>>
>>>>>> The mailing lists strips attachments, can you post it at a URL?
>>>>>>
>>>>>
>>>>> Shared here:
>>>>>
>>>>> https://drive.google.com/file/d/0B9Q-zpUXxqCnem5iYTVqLUxrcWo4cmlhdkM1=
c2lJa2dKak5R/edit?usp=3Dsharing
>>>>>
>>>>
>>>> Thanks.
>>>>
>>>> It looks like something funky going on with the vcpu state. Do you
>>>> know if there was any access to the VM via 'bhyvectl' close to the
>>>> time of the panic?
>>>>
>>>
>>> Well, I don't know if there was. I would set up the same scenario
>>> again + a script running on the host querying bhyvectl. May be I would
>>> catch it again. Please let me know if all it makes sense, and if so,
>>> how it can be made better.
>>>
>>
>> To make it clear -- I didn't run bhyvectl when the VM was running, so
>> I can tell for sure that nobody was trying to interact with the VM
>> during its run. My first thought was that it would make sense to
>> (periodically) query state of the VM using bhyvectl to get info about
>> what was going on when it comes close to the crash...
>>
>> --
>> Markiyan.
>
> Ok, I was able to hit a similarly looking panic exactly when trying to
> run "bhyvectl --vm=3Daltroot-bhyve --get-all" while the VM was busy with
> its own "pkg delete -af". When the VM is mostly idle, bhyvectl
> --get-all goes smoothly.
>
> Now I'm thinking I might inadvertently run bhyvectl over my heavily
> running VM once when I was not at the desktop and wanted to see how
> things were going remotely from my office=85
>

Thanks, that helps a lot because I can see how bhyvectl could perturb
the state of the vcpu and eventually lead to a panic.

I'll submit a fix for this ASAP.

best
Neel

> Here are core.txt of the two panics in a row:
>
> https://drive.google.com/file/d/0B9Q-zpUXxqCnMUxVdGwxSEs1dE0/edit?usp=3Ds=
haring
>
> https://drive.google.com/file/d/0B9Q-zpUXxqCnREtuTXpabnQ5QXM/edit?usp=3Ds=
haring
>
> --
> Markiyan.
>
>>
>>> --
>>> Markiyan.
>>>
>>>> best
>>>> Neel
>>>>
>>>>> --
>>>>> Markiyan.
>>>>>
>>>>>>> --
>>>>>>> Markiyan
>>>>>>>
>>>>>>>
>>>>>>> ---------- Forwarded message ----------
>>>>>>> From: Markiyan Kushnir <markiyan.kushnir@gmail.com>
>>>>>>> Date: 2013/12/13
>>>>>>> Subject:
>>>>>>> To: freebsd-current@freebsd.org, freebsd-virtualization@freebsd.org
>>>>>>>
>>>>>>>
>>>>>>> I started some ports to compile inside a bhyve instance:
>>>>>>>
>>>>>>> root@vm:~ # uname -a
>>>>>>> FreeBSD vm.mkushnir.mooo.com 11.0-CURRENT FreeBSD 11.0-CURRENT #0
>>>>>>> r259250: Thu Dec 12 14:17:32 EET 2013
>>>>>>> root@vm.mkushnir.zapto.org:/
>>>>>>> usr/obj/usr/src.svnup/sys/MAREK  amd64
>>>>>>>
>>>>>>> and left it running unattended. Approx. 2 hours later the host went=
 to
>>>>>>> panic. The bhyve instance survived after the panic and I could be a=
ble
>>>>>>> to complete my ports compilation.
>>>>>>>
>>>>>>> core.txt attached (gzipped)
>>>>>>> _______________________________________________
>>>>>>> freebsd-current@freebsd.org mailing list
>>>>>>> http://lists.freebsd.org/mailman/listinfo/freebsd-current
>>>>>>> To unsubscribe, send any mail to "freebsd-current-unsubscribe@freeb=
sd.org"
>>>>>>>
>>>>>>
>>>>>> --
>>>>>> John Baldwin
>>>>> _______________________________________________
>>>>> freebsd-current@freebsd.org mailing list
>>>>> http://lists.freebsd.org/mailman/listinfo/freebsd-current
>>>>> To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd=
.org"



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