Re: AoE for 4.x

From: Stephan Uphoff (ups_at_tree.com)
Date: 09/23/04

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    To: Julian Elischer <julian@elischer.org>
Date: Thu, 23 Sep 2004 17:51:49 -0400

    Since a complete disk operation in AoE is encapsulated in a single
    Ethernet request/response pair - The data size of a read/write operation
    is smaller than a single page.

    I don't think any existing framework can deal with this efficiently.

            Stephan

    On Thu, 2004-09-23 at 17:20, Julian Elischer wrote:
    > you could look at the sbp driver that is part of the firewire code..
    > I think that may be the closest analog.
    >
    >
    > Sam wrote:
    >
    > > On Thu, 23 Sep 2004, Julian Elischer wrote:
    > >
    > >> I think that if you have a working driver we can assign you a number.
    > >> I do have some questions however..
    > >>
    > >> this is AoE.. is it not possible at all to combne it with either the CAM
    > >> framework (such as the atapicam stuff) or the existing ATA stuff..
    > >> Don't take this the wrong way.. it's just a question..
    > >> CAM is being used to talk to drives over firewire, usb, ata, scsi,
    > >> fibrechannel.
    > >> it would seem that to unify this would be something that we should
    > >> look at..
    > >> Of course CAM itslef is showing its age in soem places and it could
    > >> do with some work itself..
    > >
    > >
    > > It might be possible to plug into the CAM; I only briefly
    > > glanced at it and it didn't appear appropriate. The ATA
    > > layer definitely isn't as parts of ATA don't make sense
    > > in this context (Read DMA, Read Multiple, eg) and AoE
    > > devices don't conform to the simple hardware probe/attach
    > > methodology (as I understand it).
    > >
    > > I would love to be proved wrong. I'm always willing to
    > > try a new approach if it's demonstrably better.
    > >
    > > Sam
    >
    >
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