Re: [Xen-devel] Xen 4.0.4, kernel 3.5.0 HVM crash and kernel BUG

[Valtteri Kiviniemi <kiviniemi.valtteri@xxxxxxxxx>]

Hi,

Yes, of course. I disabled these options:

Processor type and features:
[*] Numa Memory Allocation and Scheduler Support
[*] ACPI NUMA detection

Power management and ACPI options  --->
ACPI (Advanced Configuration and Power Interface) Support
-*-   NUMA support

Any Ideas howto debug the VNC problem any further?

- Valtteri

2012/10/3 Pasi Kärkkäinen <pasik@xxxxxx>

On Wed, Oct 03, 2012 at 12:21:47PM +0300, Valtteri Kiviniemi wrote:
>    Hi,
>
>    I disabled NUMA and upgraded to Xen 4.2.0. Windows domU starts now fine
>    and I cant anymore reproduce the hotplug problems. VNC output is still
>    just black screen and it actually crashes the the whole VNC client when
>    after a few seconds. RealVNC just shuts itself down and tightvnc crashes.
>

Valtteri: Can you actually paste the names of the .config options you disabled
and got the dom0 kernel working without crashes?

Maybe Konrad can comment if the current upstream dom0 kernel is supposed to work
with NUMA support enabled / compiled in?

-- Pasi

>    - Valtteri
>
>    2012/10/2 Valtteri Kiviniemi <[1]kiviniemi.valtteri@xxxxxxxxx>

>
>      Hi,
>
>      Yes, they are all loaded and I'm running Linux PV-virtuals at the same
>      time with no problems. Only HVM is not working. I have single socket
>      corei7 processor and NUMA enabled on dom0 kernel, so I will try tomorrow
>      to compile dom0 kernel without NUMA, since its not needed and it could
>      probably cause some kind of memory related problems.
>
>      I will also try Debian squeezes package Xen and test if it is working
>      with my hardware.
>
>      - Valtteri
>

>      2012/10/2 Konrad Rzeszutek Wilk <[2]konrad@xxxxxxxxxx>

>
>        On Tue, Oct 2, 2012 at 10:55 AM, Valtteri Kiviniemi

>        <[3]kiviniemi.valtteri@xxxxxxxxx> wrote:
>        > Hi,
>        >
>        > Yes, I understood for what the parameters were for. I'ts been a long
>        time
>        > since I last had major problems with Xen (maybe 3.1 or something,
>        been using
>        > Xen since version 2) and I had a shady recollection that Xen was
>        required to
>        > be build debugging enabled in order to get any usable debugging
>        data.
>        >
>        > But anyway, I cant reproduce that kernel crash everytime, it just
>        happens
>        > sometimes. Major problem is the black screen on VNC and second
>        problem seems
>        > to be that everytime i try to run Linux in HVM mode it somehow
>        breaks the
>        > hotplug scripts.
>        >
>
>        So do you have all backends loaded? Is xen-netback and xen-blkback
>        running?
>        Do you also have tun loaded?
>

> References
>
>    Visible links
>    1. mailto:kiviniemi.valtteri@xxxxxxxxx
>    2. mailto:konrad@xxxxxxxxxx
>    3. mailto:kiviniemi.valtteri@xxxxxxxxx

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