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    SubjectRe: [PATCH RFC] big reader semaphore take#2
    Tejun Heo wrote:
    > Hello guys,
    >
    > This is the second take of brsem (big reader semaphore).
    >
    > Nick, unfortunately, simple array of rwsem's does not work as lock
    > holders are not pinned down to cpus and may release locks on other
    > cpus.
    >

    That's right. It would require down_read to return the index
    or a pointer to the lock that it took, and to pass that into
    up_read. So it wouldn't be a completely drop-in replacement
    for a regular semaphore if that's what you had in mind?

    Nick

    --
    SUSE Labs, Novell Inc.

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