[Xen-devel] Re: Xen breaking iSCSI

[Niraj Tolia <ntolia@xxxxxxxxx>]

Since sending the below email, I started looking at the actual iSCSI
packets with Ethereal. For a read only experiment, it turns out the
disconnect only happens when dom1 requests a read of 16 KB or higher.
4 KB read requests go through just fine.

If only dom0 is performing the reads (with no other domain started),
the request length is irrelevant and all reads will complete
successfully without disconnection.

Any ideas?

Niraj


On Mon, 9 Aug 2004 14:00:34 +0100, Niraj Tolia <ntolia@xxxxxxxxx> wrote:
> I am trying to run an iSCSI initiator in dom0 and use the device in
> dom1. The initiator in question is the Cisco one (3.4.3). For some
> reason, running the initiator within Xen causes it to repeatedly
> disconnect from Target when one tries to read data from the iSCSI disk
> in dom1.
> 
> I used two different targets to make sure it was an initiator side
> problem. Also, running the initiator with vanilla linux or even just
> dom0 causes no problem. Using a hardware initiator (Intel Pro 1000/T)
> causes no problems either.
> 
> Any idea what the reason could be? This used to work earlier  and
> definitely before the s/g changes were merged in. Could this be the
> cause?
> 
> Niraj
>


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