Re: [patch-2.4.0-test2]Re: Linux-2.4.0-test2

From: Alan Cox (alan@lxorguk.ukuu.org.uk)
Date: Sun Jun 25 2000 - 07:47:20 EDT

  • Next message: Alexander Viro: "Re: owner field in `struct fs'"

    > architectures as well; the difference are that:
    > - kernels are quiet about that save Alpha
    > - on x86 these misaligned accesses are not that costly but elsewhere
    > they can be quite a drag.

    In the networking code we intentionally take them. Its faster to try to align
    (with 99.9something% success) than to always assume the worst. That is quite
    common in the kernel - it pays to assume the common good case and only pay
    for the rare cases it fails. copy_*_user has the same attitude

    Alan

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