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    SubjectRe: [PATCH] generic signal code (small new feature - userspace signal mask), kernel 2.6.16
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    Date
    Linus Torvalds <torvalds@osdl.org> writes:
    >
    > Why? You're doing user-space accesses from within critical sections with a
    > spinlock, and that's just a big no-no. Think page faults, swapping etc.

    He could pin the page in memory like futexes do. One page pinned
    per thread shouldn't be a big DOS issue either.

    -Andi
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