On Sun, Oct 27, 2024 at 08:12:26AM +1100, Nathanial Sloss wrote: > Hi, > > I've found that the PowerBook 5xx would crash randomly in pmap functions. It > seems as though PTEs were referenced beyond the end of ram. > > Unless there is a better way to handle this I'd like to commit the attached > patch. > > I found the fix while limiting the available ram in the Booter. Making the > ram > smaller in the Booter the PowerBook never crashed. But to lose 1MB ram is > wasteful so with the patch at least I only lose 48k.
What mmu_type does that machine have? Can you add debug code to dump the generated PTEs during pmap_bootstrap (or can ddb show them? If not we probably should add a mach command to do that) Could this be some bug in the msgbuf setup (machdep.c lines 294ff) ? Martin
