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Re: [Xen-devel] Build vmlinuz-2.6.29-rc5-tip

To: Pasi Kärkkäinen <pasik@xxxxxx>
Subject: Re: [Xen-devel] Build vmlinuz-2.6.29-rc5-tip
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Wed, 18 Feb 2009 14:39:44 -0800
Cc: Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>, Boris Derzhavets <bderzhavets@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
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Pasi Kärkkäinen wrote:
On Tue, Feb 17, 2009 at 10:40:54AM -0800, Jeremy Fitzhardinge wrote:
Pasi Kärkkäinen wrote:
On Tue, Feb 17, 2009 at 05:31:57AM -0800, Boris Derzhavets wrote:
Hardware config:-
C2D E8400, 8 GB RAM, ASUS P5K Premium/WIFI (Intel P35+Intel ICH9R),
2x250 SATA Seagate Barracuda (no RAID). Bios settings for ICH9R - AHCI.
Details here:-
http://bderzhavets.wordpress.com/2009/02/17/setup-xen-unstable-dom0-via-2629-rc5-pv_ops-enabled-kernel-on-intel-sataahci/

Thanks!

So it seems you're running 64 bit dom0 OS/hypervisor.. 64 bit seems to work better atm than 32 bit..
I tend to focus on 64-bit, and Ian Campbell has been looking at 32-bit. In theory there shouldn't be all that much difference between them. There have been a few issues, but they're sharing 90+% of the code. (In practice I'm interested in any bug reports, esp comparing 32 and 64-bit behaviour).


I'm testing 32bit PAE dom0 on 32bit PAE hypervisor. Today, with 2.6.29-rc5, I managed to boot my dom0 into login prompt! I haven't been able to get this working earlier.. congratulations!

I had to use 'noapic' dom0 kernel parameter though.. without 'noapic' I'm seeing
the same IRQ problems with ata_piix than earlier.

Hm, interesting. One change I made in the last few days was making gsis map 1:1 with irqs, like the native kernel. I wonder if that helps in your case. That said, I'm not quite sure how its working with noapic; I would have thought that it wouldn't go through the Xen-hooked paths that way...

Oh, you're using ahci, not piix - and that works with noapic. Hm, I should try that.

Can you start xend and a domain?

My dom0 kernel config:
http://pasik.reaktio.net/xen/pv_ops-dom0-debug/config-2.6.29-rc5-tip-dom0

My grub.conf:
http://pasik.reaktio.net/xen/pv_ops-dom0-debug/grub.conf

Working dom0 bootlog with 'noapic':
http://pasik.reaktio.net/xen/pv_ops-dom0-debug/pv_ops-dom0-bootlog-13-xen331-linux-2.6.29-rc5-noapic.txt
What does your /proc/interrupts look like in this case?

Failing dom0 bootlog (without 'noapic'):
http://pasik.reaktio.net/xen/pv_ops-dom0-debug/pv_ops-dom0-bootlog-12-xen331-linux-2.6.29-rc5.txt

Do you think you could boot from a usb device or something and see if you can get /proc/interrupts for this as well?

Thanks,
   J

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