Re: [Xen-devel] Xen 4 serial hangs during boot

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 26.07.12 at 15:50, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> wrote:
> Then recently (yesterday?) the upstream kernel started doing something
> wonky on this card:
> 
> 01:05.0 Serial controller: NetMos Technology PCI 9835 Multi-I/O Controller 
> (rev 01)
> Under Xen, when it boots it hits right here:
> [    1.240774] pci 0000:01:05.0: [9710:9835] type 00 class 0x070002
> and then stops [note: I hadn't really done any investigation to see
> if the machine is dead or if it continues on, but with the serial port just
> wedged hard].

The machine state here, if accessible at all, would of course be
very interesting.

> On baremetal it can actually read the IO bars:
> [    1.240774] pci 0000:01:05.0: [9710:9835] type 00 class 0x070002
> [    1.247075] pci 0000:01:05.0: reg 10: [io  0xe050-0xe057]
> [    1.252734] pci 0000:01:05.0: reg 14: [io  0xe040-0xe047]
> [    1.258394] pci 0000:01:05.0: reg 18: [io  0xe030-0xe037]
> [    1.264054] pci 0000:01:05.0: reg 1c: [io  0xe020-0xe027]
> [    1.269713] pci 0000:01:05.0: reg 20: [io  0xe010-0xe017]
> [    1.275372] pci 0000:01:05.0: reg 24: [io  0xe000-0xe00f]
> 
> so I am wondering if the back-ports in Xen 4.1 for dealing with
> PCI have something to do with this? 

What backports are you thinking of? I just went through the titles
of everything since 4.1.2, and nothing that has "PCI" in it looks
in any way dangerous.

Jan


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