On Wed, 21 May 2014, H. Peter Anvin wrote: > > I certainly like this way of handling it. We can even issue a nice > > banner saying something like "You're f*cked - go change hw." > > Actually, it would be a lot better to panic than deadlock (HA systems > tend to have something in place to catch the panic and/or reboot). Any > way we can see if the CPU is already holding that lock and panic in that > case?
Well, spin_trylock() and then either spin_unlock() and proceed sending the signal, otherwise panic(). -- Jiri Kosina SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
