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    SubjectRe: [rfc] "fair" rw spinlocks
    On Wed, Nov 25, 2009 at 09:49:23AM +0100, Andi Kleen wrote:
    > David Miller <> writes:
    > >
    > > I think nobody would notice if you changed tasklist_lock into
    > > a spinlock_t, and this would solve the DoS because at least on
    > > x86 you'd end up with the ticket spinlocks.
    > iirc tasklist_lock was one of them who could be potentially nested.
    > So just turning it into a spinlock might deadlock.

    It can be nested I think due to interrupt context. But if the read
    side disables interrupts too, then I think it should be OK (though
    I haven't audited this closely).

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      Last update: 2009-11-25 09:59    [W:0.017 / U:81.232 seconds]
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