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RE: [Xen-devel] Unknown interrupt on x86_64 Xen on ES7000 x86_64

To: "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>, "Nakajima, Jun" <jun.nakajima@xxxxxxxxx>
Subject: RE: [Xen-devel] Unknown interrupt on x86_64 Xen on ES7000 x86_64
From: "Puthiyaparambil, Aravindh" <aravindh.puthiyaparambil@xxxxxxxxxx>
Date: Thu, 11 Aug 2005 13:30:27 -0400
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, Chris Wright <chrisw@xxxxxxxx>, "Magolan, John F" <John.Magolan@xxxxxxxxxx>, "Subrahmanian, Raj" <raj.subrahmanian@xxxxxxxxxx>, "Davis, Jason" <jason.davis@xxxxxxxxxx>, "Vessey, Bruce A" <Bruce.Vessey@xxxxxxxxxx>
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Thread-topic: [Xen-devel] Unknown interrupt on x86_64 Xen on ES7000 x86_64
I can no longer reproduce (banging head against wall) the issue [Domain
0 (vcpu#0) crashed on cpu#0] with the 6093 changeset!!! This is with
both the debug and non-debug versions. Maybe changeset 6091 fixed the
problem. I am a little uncomfortable that I don't the know root cause of
the problem. I hope this does not come back later.
Jun, Keir, thanks for all your help with this. 

Now Xen boots but in Dom0 the system starts to lose interrupts. This is
because the x86_64 SMP patch submitted by Chris Wright (changeset 6090)
always puts the system in flat APIC mode in Dom0. The ES7000 x86_64
needs to be in clustered APIC mode. We need to come up with a way to
accommodate clustered APIC mode in genapic_xen. Someone at Unisys will
look into this and come out with a patch.


> -----Original Message-----
> From: Keir Fraser [mailto:Keir.Fraser@xxxxxxxxxxxx]
> Sent: Thursday, August 11, 2005 12:06 PM
> To: Nakajima, Jun
> Cc: xen-devel@xxxxxxxxxxxxxxxxxxx; Puthiyaparambil, Aravindh; Magolan,
> John F; Vessey, Bruce A; Subrahmanian, Raj; Davis, Jason
> Subject: Re: [Xen-devel] Unknown interrupt on x86_64 Xen on ES7000
> On 11 Aug 2005, at 15:49, Nakajima, Jun wrote:
> >
> > BTW, the machine has discontiguous memory regions (3 of them for >=
> > 0x100000), and the 0x100000 one has less than 1GB (892MB). I guess
> > would work if mem=512m is set.
> We should work correctly for memory holes above about 16MB.
>   -- Keir

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