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

[Jun Kamada <kama@xxxxxxxxxxxxxx>]

Dear Keir-san,

Can I ask one question for my correct understanding?

On Tue, 23 Oct 2007 13:39:24 +0100
Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> wrote:
> Anyway, the right answer is to ensure that your structures compile the same
> whether compiled with 32-bit or 64-bit gcc. Check the structure sizes,
> fields sizes and field offsets.

You showed me two options in previous email; i.) all the shared-memory
structures defined in vscsiif.h compile identically for 32-bit and
64-bit mode, ii.) to detect the frontend's 'bitness' in scsiback and
optionally do 32-to-64 or 64-to-32 conversion.

I consider that current VBD implementation takes option ii.), however
you recommended me to take option i.) for pvSCSI driver.
Is my understanding right?

Best regards,

-----
Jun Kamada
Linux Technology Development Div.
Server Systems Unit
Fujitsu Ltd.
kama@xxxxxxxxxxxxxx



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