linux-kernel - Re: [LKML] [PATCH] Fix NULL pointer for Xen guests

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Date:	Mon, 3 May 2010 15:16:34 -0400
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	Prarit Bhargava <prarit@...hat.com>
Cc:	linux-kernel@...r.kernel.org, suresh.b.siddha@...el.com,
	x86@...nel.org, clalance@...hat.com, drjones@...hat.com
Subject: Re: [LKML] [PATCH] Fix NULL pointer for Xen guests

>> OK, so your control domain is RHEL5. Mine is the Jeremy's xen/next one
>> (2.6.32). Let me try to compile RHEL5 under FC11 - any tricks necessary
>> to do that?
>>    
>
> I haven't tried it -- it might work :)
>
> Also, did you try booting with maxvcpus > vcpus as drjones suggested ?

Yes. No luck reproducing the crash/panic. I am just not seeing the failure you
guys are seeing.

Let me build once more 2.6.33 vanilla + CONFIG_DEBUG_MARK_RODATA=n) and check
this. And also install a vanilla RHEL5 dom0 as it looks impossible to
compile a 2.6.18-era kernel under FC11.

The Xen I am using is xen-unstable - so 4.0.1. I know that the IRQ balance
code in the Xen hypervisor was fixed in 4.0 (it used to run out of
context - now it runs in the IRQ context). Maybe this bug you are seeing
(and have the fix for) is just a red-heering?
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