threads/118910: Multithreading problem

David Xu davidxu at
Fri Dec 21 00:07:20 PST 2007

Daniel Eischen wrote:

> I don't think it is as big a change as you think it is.  We already
> have several layers of priorities (interrupt, time-share, idle, ?).
> All threads belong to these classes.  As long as priority inheritence
> works, there should be no problems.  The problems seem to occur when
> we try to inject artificial priorities into threads, like using
> msleep().  I think we are better off just letting threads run based
> on their own base priority and whatever their inherited priority is.

For test purpose, you may try to ignore thread priority parameter
in msleep(), I didn't test this, but it does change the FreeBSD
behavior. I don't know any side effect since I am unable to test
all applications in the world, maybe you can start a project to hack
it ?

David Xu

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