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    SubjectRe: Memory corruption due to word sharing
    On Wed, 2012-02-01 at 16:19 +0100, Jan Kara wrote:

    > I've raised the issue with our GCC guys and they said to me that: "C does
    > not provide such guarantee, nor can you reliably lock different
    > structure fields with different locks if they share naturally aligned
    > word-size memory regions. The C++11 memory model would guarantee this,
    > but that's not implemented nor do you build the kernel with a C++11
    > compiler."

    That's interesting. So it seems like there are two solutions:

    1) Use the same lock for a given bitfield
    2) Split up the bitfield into different words

     \ /
      Last update: 2012-02-01 17:41    [W:0.022 / U:4.968 seconds]
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