Thread (36 messages) 36 messages, 5 authors, 2008-03-03

Re: [(RT RFC) PATCH v2 1/9] allow rt-mutex lock-stealing toincludelateral priority

From: Gregory Haskins <hidden>
Date: 2008-03-03 16:02:22
Also in: lkml

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On Mon, Mar 3, 2008 at 10:55 AM, in message
[ref], Steven Rostedt
[off-list ref] wrote: 
On Mon, 3 Mar 2008, Gregory Haskins wrote:
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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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