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Re: [Xen-devel] [PATCH 0/5] pvSCSI (SCSI pass through) driver

To: Jun Kamada <kama@xxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH 0/5] pvSCSI (SCSI pass through) driver
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Tue, 23 Oct 2007 09:50:38 +0100
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> The CONFIG_XEN_FC stuff is used for activating FC(Fibre Channel)
> transport layer functionality. I will attach additional patch for the
> stuff.

Okay, thanks.

Another question about the original patches: did you test that a 64-bit
backend can communicate with 32-bit frontend (and vice versa)? Either you
need to make sure that all the shared-memory structures defined in vscsiif.h
compile identically for 32-bit and 64-bit mode, or you need to detect the
frontend's 'bitness' in scsiback and optionally do 32-to-64 or 64-to-32
conversion. I think it's obvious which is less hassle. ;-)

Handling this is really a prerequisite for putting these patches into a
stable Xen release.

 -- Keir



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