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    SubjectRe: [RFC] New locking primitive for 2.5
    On Thu, Feb 07, 2002 at 01:40:59PM -0500, Robert Love wrote:
    > > To really take any benefit from a preemptible kernel a lot of spin locks
    > > will have to be replaced by mutex locks. The combi-lock approach may
    > > convince more people who typically fear the higher scheduling pressure
    > > of sleeping locks to do so, if they can decide on each instance which
    > > approach (spin of sleep) will be taken.
    >
    > We shouldn't engage in wholesale changing of spinlocks to semaphores
    > without a priority-inheritance mechanism. And _that_ is the bigger
    > issue ...

    Cool. We can then have the Solaris "this usually doesn't fail on test" priority
    inherit read/write lock. I can hardly wait.


    --
    ---------------------------------------------------------
    Victor Yodaiken
    Finite State Machine Labs: The RTLinux Company.
    www.fsmlabs.com www.rtlinux.com

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