Re: [Xen-devel] XenOProfile may have the conflict with SATA AHCI mode.

["Liang Yang" <multisyncfe991@xxxxxxxxxxx>]

I once thought maybe the problem is caused by the failure of loading AHCI 
driver. So I added --preload=AHCI when building ramdisk for Xen after 
XenOProfiling is enabled.
However, Xen still booted into kernel panic with weird mount errors.

I used some patch for XenOProfile nmi_int.c to make it work on Intel core 2 
based processors. I notice Xen also updated nmi_int.c a couple of days ago 
to make XenOProfile
recognize Intel core 2 based processors. I hope the problem is not caused by 
the updates of nmi_int.c.
BTW, The BIOS is already flashed to the latest I could get.

Liang

----- Original Message ----- 
From: "Ian Pratt" <Ian.Pratt@xxxxxxxxxxxx>
To: "Liang Yang" <multisyncfe991@xxxxxxxxxxx>; 
<xen-devel@xxxxxxxxxxxxxxxxxxx>
Sent: Wednesday, April 11, 2007 12:17 PM
Subject: RE: [Xen-devel] XenOProfile may have the conflict with SATA AHCI 
mode.

> I notice this issue recently when I'm using XenOProfile with the
latest
> Xen-unstable repository. I have several SATA disks to hose several
guest
> domains. For the performance purpose, I want to use the on-board AHCI
> mode
> so each SATA disk has its own data transfer channel. However, I found
> XenOProfile has some conflict with AHCI mode as Xen will boot into
> kernel
> panic with weird mount errors after XenOProfile is enabled. The
problem
> is
> gone when I set SATA mode to compatible  in BIOS (i.g. IDE emulation
> mode).
XenOProfile is the only thing that uses NMIs, but I've no idea why that
would interfere with the SATA controller.

If you were seing the issue round the other way I'd suspect something
dodgy with the BIOS'es SMM mode. Might still be worth checking for a
BIOS upgrade.

Ian

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