Re: [Xen-devel] Trying to track down odd behavior, errors in xen dmesg

[Keith Swett <swettk@xxxxxxxxx>]

On Thu, Apr 7, 2011 at 8:54 AM, Konrad Rzeszutek Wilk
<konrad.wilk@xxxxxxxxxx> wrote:
> On Wed, Apr 06, 2011 at 11:30:02AM -0500, Keith Swett wrote:
>> Hi,
>>
>> I'm having a strange issue with Xen 4.0.1 AMD64 (debian squeeze).
>> I am importing a iSCSI lun into dom0 from a storage array (using
>> open-iscsi), this is used as the disk [phy:] for my domU.
>
>> If I use HVM, the install works correctly. As soon as I switch to pv
>> for the disk drivers (after installing a xen kernel in the domU) I get
>> a slew of messages in xm dmesg:
> This problem does not occur if the phy is pointing to a local disk?

No issues when pointing to local disk, partition or LVM.

>> (XEN) grant-table.c:1956:d0 Could not get src frame 3f3149
>> (XEN) printk: 1851 messages suppressed.
>> (XEN) grant-table.c:1956:d0 Could not get src frame 3f3728
>> (XEN) printk: 1354 messages suppressed.
>> (XEN) grant-table.c:1956:d0 Could not get src frame 3f3485
>> (XEN) printk: 1890 messages suppressed.
>> (XEN) grant-table.c:1956:d0 Could not get src frame 3f3e58
>> (XEN) printk: 2153 messages suppressed.
>> (XEN) grant-table.c:1956:d0 Could not get src frame 3f3c9c
>> (XEN) printk: 1912 messages suppressed.
>> (XEN) grant-table.c:1956:d0 Could not get src frame 3f4287
>> (XEN) printk: 2287 messages suppressed.
>> (XEN) grant-table.c:1956:d0 Could not get src frame 3f40dc
>> Disk speed is very slow as well. Running DD in the domU to write a
>> file to disk causes more error messages to appear.  It also badly
>> corrupts the disk in some cases.
>> Testing from a local LVM works without error in all cases.
>>
>> Any suggestions?
>> --Keith
>>
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>> http://lists.xensource.com/xen-devel
>

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