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    SubjectRe: PATCH: killing read_ahead[]

    On Wed, 25 Oct 2000, Jeff V. Merkey wrote:

    > Al,
    > Thanks. I'll print this one out and post it on the wall for tonight's
    > debugging session.
    > > (e.g. generic_commit_write have to mess with i_size value to update the
    Ugh. s/have/doesn't have/, indeed. Sorry.

    As for tonight's debugging session... I love your optimism, but I would
    really like to see comments from Linus. For one thing, patch intersects
    with Rik's one, so I wouldn't expect that to be over tonight (and that's
    completely aside of the chances that Linus will say "no" to that idea).

    ObDevices: the last time when we were talking about the devices-in-pagecache
    the things stopped on the ->i_size accesses and related ugliness. IMO the
    main reason of that ugliness was in the attempts to _move_ the i_size to
    address_space. Which was a patently bad idea. How about mirroring it
    there? Notice that atomicity is not an issue - we don't have it when we
    set/modify long long anyway. Said that, I really think that caching the
    values of these expressions makes sense regardless of device handling.

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