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    SubjectRe: [PATCH] AFS: Implement shared-writable mmap [try #2]
    Nick Piggin <> wrote:

    > No, you shouldn't. We could theoretically introduce a new API for this,
    > but I think it would be preferable if you can fix the race in the fs.

    Actually, I might be able to do better.

    When making a StoreData call to the AFS server, I send all the parameters
    first, and at that point, the server will abort it, I think, if permission is
    not available, and won't wait for the payload to be delivered.

    So if I tell AF_RXRPC to send the parameter data with an explicit ACK request
    and then wait till it's either hard-ACK'd or aborted, I should then be able to
    deal with the permissions failure at a state where I have locked *all* the
    pages to be sent.

    At that point, I should be able to tell truncate to simple discard all these
    locked pages.

    How's that sound?

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      Last update: 2007-05-17 14:33    [W:0.019 / U:1.632 seconds]
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