On Sat, Nov 15, 2008 at 04:10:34PM -0500, Rafal Boni wrote: > I just got a locking-against-myself panic on an XScale pxa250 (ARM) > [..] > > It looks like the problem is that the callout data is protected by locks > at IPL_SCHED whereas com(4) interrupts at IPL_HIGH; the lock that is being > locked recursively is the callout lock. > > I don't know if there are serial drivers that run at-or-below-IPL_SCHED, > but if not, it might make sense to remove the RND_COM option. It's been marked broken in i386 configs for exactly this reason; apparently the same applies elsewhere. -- Dan.
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