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Re: [Xen-devel] [PATCH 0/6] pvSCSI (SCSI pass through) driver

Stephen C. Tweedie wrote:

On Tue, 2007-10-30 at 19:39 +0900, Jun Kamada wrote:

Is this using the same syntax for HBA reservation that we used to have,
ie. simply enumerated using the scsi host number on the dom0?

If so, that is rather fragile.  The scsi host number can change from
kernel to kernel depending on HBA driver probe order and PCI bus
enumeration order.  It changes when hardware is rearranged.  And how do
we deal with migrate, when we'll need to select a completely different
HBA on a different host?

Selecting the HBA by scsi host number is good enough for a demonstration
that the code works, but I don't think it's going to be robust enough
for production deployment.
Also, has there been any progress towards exposing individual LUNs to
the guest rather than a whole HBA?
NPIV can help here for FibreChannel devices. You can create a virtual NPIV adapter, and export exactly the LUNs/devices you want to that adapter.

It's a different approach then exporting LUNs, but similar result.

Cheers, Stephen

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