On Thursday 16 February 2006 00:38, Mike Lee wrote:
> Hello All,
>
> I am new to the Xen scene but an experienced Linux user. Today I
> downloaded and installed the tarballed version of Xen 3.0 on my Dell
> PowerEdge 2850 server (1x3.4GHz x86_64 proc, 4GB RAM, 700GB storage). I
> successfully made my initrd image from the 2.6.12.6-xen (not xen0) libs
> and booted up. However, now that I have modified the grub.conf file and
> specified the dom0_mem for the master domain and rebooted, Xwindows
> hangs when it (Xwindows) tries to start up. If I leave the dom0_mem
> setting out of my grub.conf file, everything works fine, but now I can't
> allocate memory to my slave OSs. Any thoughts. FYI; I did see on the
> FAQ that this could be caused by agpart, but it was refering to the 2.x
> series of Xen.
> Also, after approx. 20 mins. after running the Xen0 master kernel,
> the system logger says that it is disabling IRQ 16. Any thoughts as to
> why? Below I have both my grub.conf file and the entries in my
> /var/log/messages file (regarding the IRQ16 disabling).
>
> Thanks in advance.
>
> Mike Lee
> Below is my messages log entry when IRQ 16 is disabled:
>
> Feb 15 16:25:57 nmg-xen-master kernel: irq 16: nobody cared!
> Feb 15 16:25:57 nmg-xen-master kernel:
> Feb 15 16:25:57 nmg-xen-master kernel: Call
> Trace:<ffffffff801560e0>{__report_bad_irq+48}
> <ffffffff801561b9>{note_interrupt+
> 89}
> Feb 15 16:25:57 nmg-xen-master kernel:
> <ffffffff801559ec>{__do_IRQ+252} <ffffffff80116d14>{do_IRQ+52}
> Feb 15 16:25:57 nmg-xen-master kernel:
> <ffffffff8010eb65>{evtchn_do_upcall+197}
> <ffffffff80113aa9>{do_hypervisor_call
> back+17}
> Feb 15 16:25:57 nmg-xen-master kernel:
> <ffffffff8010d0ca>{hypercall_page+202}
> <ffffffff8010d0ca>{hypercall_page+202}
> Feb 15 16:25:57 nmg-xen-master kernel:
> <ffffffff80111178>{xen_idle+104} <ffffffff801111ca>{cpu_idle+58}
> Feb 15 16:25:57 nmg-xen-master kernel:
> Feb 15 16:25:57 nmg-xen-master kernel: handlers:
> Feb 15 16:25:57 nmg-xen-master kernel: [<ffffffff802a37f0>]
> (usb_hcd_irq+0x0/0x70)
> Feb 15 16:25:57 nmg-xen-master kernel: Disabling IRQ #16
Hmmm, I have a similar message on one of my boxes, but it doesn't happen after
a while on its own, instead always exactly the moment an USB device is
plugged in.
USB keeps working afterwards, so I didn't bother searching for the reason.
I don't run Xwindows, though, the box hosts some database + webserver domains.
Server is 2xXeon in EM64T mode with HT enabled, 8GB ram.
/Ernst
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