Messages in this thread | | | Date | Thu, 8 May 2008 01:25:03 -0700 | From | Andrew Morton <> | Subject | Re: futex: priority wakeup miss ordering |
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On Wed, 07 May 2008 14:22:58 -0700 Daniel Walker <dwalker@mvista.com> wrote:
> > > from commit ec92d08292d3e9b0823eba138a4564d2d39f25c7 > > The wakeup ordering should be in priority order. However if the priority > of a task is modified while it's waiting on the futex you will get an > out of order wakeup. > > If you use a priority inheriting mutex this is correct. It's because the > rtmutex hooks into sched_setscheduler to catch any priority changes, > then re-queues with the new priority.. But the futex doesn't have this > hook. > > Was this intentionally left out of this priority wake up patch? I > thought I would let you know in case you had a specific reason for not > handling this.. >
Pierre is no longer @bull.net.
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