Re: [Xen-devel] Re: pvops kernel branches - 2.6.36 options, stable/next/etc?

[Bruce Edge <bruce.edge@xxxxxxxxx>]

On Thu, Nov 11, 2010 at 12:03 PM, Boris Derzhavets <bderzhavets@xxxxxxxxx> wrote:

Konrad,

2.6.35.8 (mainline) works as PV DomU kernel ( at Xen 4.0.1 Dom0)  with NFS remote folder  with no issues. So,  2.6.35.8, 2.6.36 been built via upstream source are OK. Seems  to be .37-rc1 bug

I agree. I reinstalled a 2.6.36 domU and am unable to get it to crash using the same actions that reliably crashed the 2.6.37-rc1 domU.

Would it be worth bisecting the konrad-pcifront-2.6.32 branch to find which it started failing?
I think that 8029255fcc3a7925ad8ee9f5fdc0764b6662301e (on 10/24) was the last good sync that I got.

-Bruce
 

Boris

--- On Thu, 11/11/10, Bruce Edge <bruce.edge@xxxxxxxxx> wrote:

From: Bruce Edge <bruce.edge@xxxxxxxxx>
Subject: Re: [Xen-devel] Re: pvops kernel branches - 2.6.36 options, stable/next/etc?

To: "Boris Derzhavets" <bderzhavets@xxxxxxxxx>
Cc: "Konrad Rzeszutek Wilk" <konrad.wilk@xxxxxxxxxx>, "Jeremy Fitzhardinge" <jeremy@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "ian.campbell@xxxxxxxxxx" <ian.campbell@xxxxxxxxxx>, "Stefano Stabellini" <stefano.stabellini@xxxxxxxxxxxxx>
Date: Thursday, November 11, 2010, 1:32 PM

On Thu, Nov 11, 2010 at 10:09 AM, Boris Derzhavets <bderzhavets@xxxxxxxxx> wrote:

Bruce,

 I believe , Konrad wants us to test vanilla 2.6.36(5)(4) for the issue with NFS folder.

I built a mainline 2.6.36 and it's not crashing with the same config.
Of course it doesn't have pci passthrough as it's not available in that kernel.

So that puts it in the 36 -> 37-rc1 region. Is there any reason to test anything before 2.6.36?

I'll reboot it a few more times to confirm that it's stable.

-Bruce

Boris


--- On Thu, 11/11/10, Bruce Edge <bruce.edge@xxxxxxxxx> wrote:

From: Bruce Edge <bruce.edge@xxxxxxxxx>

Subject: Re: [Xen-devel] Re: pvops kernel branches - 2.6.36 options, stable/next/etc?

To: "Konrad Rzeszutek Wilk" <konrad.wilk@xxxxxxxxxx>
Cc: "Jeremy Fitzhardinge" <jeremy@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "ian.campbell@xxxxxxxxxx" <ian.campbell@xxxxxxxxxx>, "Stefano Stabellini" <stefano.stabellini@xxxxxxxxxxxxx>
Date: Thursday, November 11, 2010, 11:48 AM

On Nov 11, 2010, at 8:25 AM, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> wrote:

>>> Well, I am working on a PCI E820 hole thingie,
>>
>>
>> If this for the 4GB mem limit on pvops domUs?
>
> Yup. I got it to boot nicely yesterday too. The patches are in
> devel/e820-hole, _but_ you need patches for the toolstack. Those
> aren't ready yet (they are quite skanky right now).

Fantastic. I'm looking forward to this.
>
>>> Hmm, so the difference between that and the upstream is the PVonHVM and
>>> the initial domain 0 support (all in Stefano's tree).
>>>
>>
>> I tried disabling the  CONFIG_XEN_PVHVM with no change. (see the "2.6.37-rc1
>> mainline domU - BUG: unable to handle kernel paging request" thread.
>> Is that sufficient to eliminate the PnonHVM from the equation?
>
> Yes should be. And based on your output it doesn't seem to make much difference.
>
> I think bisecting the code and just running as DomU PV (without PCI passthrough)
> and trying different kernels: 2.6.36, 2.6.35, 2.6.34 and seeing if you get the
> same or similar hang can help us a bit. If you can get hold of Boris you could
> both coordinate this?

Any particular pvops branch, or mainline Linux?

-Bruce
>
> I've got to fix this AMD bootup hang, but once I am done I can switch over to this,
> unless somebody else picks it up (Jeremy, Stefano, Ian?)

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