Linas Vepstas wrote: > > I was futzing with linux-2.6.23-rc8-mm1 in a power6 lpar when, > for whatever reason, a spinlock locked up. The bizarre thing > was that the rest of system locked up as well: an ssh terminal, > and also an hvc console. > > Breaking into the debugger showed 4 cpus, 1 of which was > deadlocked in the spinlock, and the other 3 in > .pseries_dedicated_idle_sleep > > This was, ahhh, unexpected. What's up with that? Can > anyone provide any insight?
Sounds consistent with a task trying to double-acquire the lock, or an interrupt handler attempting to acquire a lock that the current task holds. Or maybe even an uninitialized spinlock. Do you know which lock it was? _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
