Subject: Re: Source for SCSI driver info?
To: David C. Myers <firstname.lastname@example.org>
From: Henry B. Hotz <email@example.com>
Date: 05/03/1995 11:04:22
At 8:42 AM 5/3/95 -0400, David C. Myers wrote:
>Drew's driver seems pretty complete, with multiple message queues, real and
>pseudo DMA, scatter/gather (whatever that means), and so on.
Look at readv/writev. A single IO call using a struct iovec argument will
parcel out so many bytes to this location, so many to that, so many to the
next, etc. It's trivial to convert to a multiple read calls, but
theoretically, potentially, more efficient, especially if you have smart IO
subsystems like channels on IBM mainframes.
Henry B. Hotz firstname.lastname@example.org
The opinions expressed are my own,
not Loral's, and not Librascope's.