Lets just say that this is good fault tolorance. What ever can go wrong
will, all drivers are faulty. This sounds like a good idea and should be
implemented for ordinary use or something like it.
Unless you thing we should KP on a lock being held for more then a given
time(30 seconds)?
--- Keith Whitwell <[EMAIL PROTECTED]> wrote:
> Nicolai Haehnle wrote:
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> >
> > It seems to me as if DRM(unlock) in drm_drv.h unlocks without checking
>
> > whether the caller actually holds the global lock. There is no
> > LOCK_TEST_WITH_RETURN or similar, and the helper function
> lock_transfer has
> > no check in it either.
> > Did I miss something, or is this intended behaviour? It certainly
> seems
> > strange to me.
> >
> > Also, it is possible for a DRI client to effectively lock up the
> entire
> > machine simply by entering an endless loop after taking the lock. I
> suppose
> > one could still log in remotely and kill the offending process, but
> that's
> > not a realistic option for most people. Switching to a different VT or
>
> > killing the X server does not work, because the X server has to take
> the
> > DRI lock in the process.
> >
> > This is a problem that I want to fix (it makes playing around with the
> R300
> > hack Vladimir Dergachev posted an infinite-rebooting nightmare), but I
> am
> > unsure what the best solution would be.
>
> If you're looking for ways to deal with debugging unstable drivers, I'm
> sorry
> but there's nothing that's going to come close to using two machines -
> one to
> do all your development, etc. on, and the other to continually reboot,
> crash,
> etc. as your test box.
>
> Keith
>
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