Re: [(RT RFC) PATCH v2 1/9] allow rt-mutex lock-stealingtoincludelateral priority
From: Gregory Haskins
Date: Mon Mar 03 2008 - 11:02:22 EST
>>> On Mon, Mar 3, 2008 at 10:55 AM, in message
<Pine.LNX.4.58.0803031051410.19405@xxxxxxxxxxxxxxxxxxx>, Steven Rostedt
<rostedt@xxxxxxxxxxx> wrote:
> On Mon, 3 Mar 2008, Gregory Haskins wrote:
>
>> >>> On Mon, Mar 3, 2008 at 10:13 AM, in message
>> >
>> > See the issue. The RT task on CPU0 may experience huge latencies.
>>
>> Agreed, but equal priority threads can always cause unbounded latencies by
> definition. I.e. we only guarantee to the highest thread.
>
> It should not when they are bounded to two separate CPUs, and are the
> highest priority tasks on those CPUS. That will be hard to explain, how a
> the highest prio tasks bounded to a single CPU had an unbounded latency.
> With the patches presented, this can happen.
Indeed. I see your point. I will make this change in the next revision.
Thanks for the review!
-Greg
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