Re: [Xen-users] xen i/o errors

[Kacper <kacper@xxxxxxxxx>]

Hi,

I tried to make a debug trace of xend and I think I found something relevant.

---
Traceback (most recent call last):
 File "/usr/lib/xen-4.0/lib/python/xen/xend/xenstore/xswatch.py",
line 63, in watchMain
   we = xs.read_watch()
Error: (22, 'Invalid argument')
---

Can this be causing the machine to hang (it appears multiple times in
the trace, and the trace ends with this error)? The whole log can be
found at http://dl.dropbox.com/u/1008610/xend.trace.txt

On Tue, Jun 12, 2012 at 1:14 AM, Casey DeLorme <cdelorme@xxxxxxxxx> wrote:
> Thanks, that helped me begin looking for you.
>
> Unfortunately going on these posts your hardware may not work with Xen out
> of the box:
> http://www.linuxquestions.org/questions/linux-virtualization-90/xen-on-debian-hangs-my-machine-4175410758/
>
> http://old-list-archives.xen.org/archives/html/xen-users/2010-07/msg00696.html
> http://old-list-archives.xen.org/archives/html/xen-users/2010-07/msg00699.html
>
> No responses to a 2010 post is not promising, but the second of the two
> archived messages states that there is no hardware virtualization on the
> PowerEdge 2600.
>
> Not sure where to proceed from here, I have never used server hardware.
>
> On Mon, Jun 11, 2012 at 7:00 PM, Kacper <kacper@xxxxxxxxx> wrote:
>>
>> Thanks,
>>
>> Let's see now.
>>
>> Xen version: xen-hypervisor-4.0-i386 (4.0.1-4)
>> Kernel: 3.2+44~bpo60+1 (debian squeeze backport)
>>
>> It was all installed using apt-get (eg. the package manager).
>>
>> The system I have xen troubles with is a Dell PowerEdge 2600 (32-bit,
>> 2 x 1 Xeon. no Intel Vt-d) with a via_sata controller and two sata
>> drives.
>>
>> Intel IOMMU, doesn't that require Intel Vt-d?
>>
>> Please let me know if there is more information I can provide.
>>
>> On Tue, Jun 12, 2012 at 12:40 AM, Casey DeLorme <cdelorme@xxxxxxxxx>
>> wrote:
>> > Hello,
>> >
>> > Additional information about your hardware might help others debug the
>> > situation.
>> >
>> > What version of Xen are you using?  Are you compiling or is it from the
>> > package manager?
>> >
>> >
>> > I have experienced a DMA READ issue before but I have no idea if it is
>> > relative to your configuration.  Something to do with a Marvell SATA
>> > controller and intel's IOMMU, which was optional when compiling the
>> > kernel
>> > but required fror VT-d/IOMMU Passthrough.
>> >
>> > I don't know if that is much help to you, but feel free to add more
>> > system
>> > information to help everyone debug.
>> >
>> > ~Casey
>> >
>> > On Mon, Jun 11, 2012 at 4:59 AM, Kacper <kacper@xxxxxxxxx> wrote:
>> >>
>> >> Hello,
>> >> I've been trying to setup xen on Debian Squeeze but it isn't going that
>> >> well.
>> >> When booting with the xen/hypervisor kernel the system hangs with i/o
>> >> errors thrown in console. The standard kernel is working fine and the
>> >> disk has been tested and swapped.
>> >> Errors include:
>> >> ata1.00: failed command: READ DMA
>> >> task xend:1404 blocked for more than 120 seconds
>> >> Buffer I/O error on device sda1
>> >> end_request: I/O error, dev sda
>> >>
>> >> _______________________________________________
>> >> Xen-users mailing list
>> >> Xen-users@xxxxxxxxxxxxx
>> >> http://lists.xen.org/xen-users
>> >
>> >
>>
>> _______________________________________________
>> Xen-users mailing list
>> Xen-users@xxxxxxxxxxxxx
>> http://lists.xen.org/xen-users
>
>

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