Keep a flag to indicate display list bailout.
Always trigger interrupts on signal.

It seems likely the hardware does this.
Change the state in PSP_GE_SIGNAL_HANDLER_SUSPEND.
Switch to a fixed size displaylist queue.
Implement sceGeListDeQueue().

Doesn't seem often used, though.
Correct wait signal handling.
Add some GPU related reporting.
Merge pull request #1182 from unknownbrackets/dlist-parts

More of Orphis' dlist rewrite (signal handling)