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

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

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?
> 
> (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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