Subj : Re: lock preemption
To   : comp.unix.aix,comp.programming.threads
From : Kamal R. Prasad
Date : Tue Jun 21 2005 11:20 pm



Ben Hutchings wrote:
> Kamal R. Prasad <kamalp@acm.org> wrote:
> > Hello,
> >
> >  I am dealing with a strange beast called complex locks inside AIX
> > kernel extensions. The documentation indicates that a higher priority
> > thread can premept a lower priority thread holding a complex lock.
> <snip>
>
> I think you are misinterpreting a description of priority *promotion*.
> This is a feature that boosts the priority of a thread holding a lock
> while a higher-priority thread is waiting for the lock.  This avoids
> the well-known problem of priority inversion.
>
thanks.Yes -I misunderstood priority promotion. I figured it out and
the 2nd post on this thread was actually a mistake (I wanted to update
another query on get_stkp() that I made on comp.unix.aix).
regards
-kamal

> --
> Ben Hutchings
> Anthony's Law of Force: Don't force it, get a larger hammer.

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