On Thu, 20 Apr 2023, Michael Schmitz wrote:
Am 20.04.2023 um 19:47 schrieb Finn Thain:
So all the stack pages would have been faulted in well before the
failure shows up. It appears to be the signal that's the problem and
not the page fault. That's not surprising considering the PC in the
signal frame in the dash crash was a MOVEM saving registers onto the
stack.
Well. without locking the faulted in pages in memory we can't be sure
they were not swapped back out. Unless I misunderstand what's
involved in that ...
There was no swap enabled.
50000 frames * 36 bytes per frame == 1.8 MB
OK - swap is enabled in my case. That may explain the different fault
rates.
But in any case, it looks like we can eliminate the bus error code. Same
fault on both 030 and 040 with very different bus error handlers is
highly unlikely.
There's no failure on '040. QEMU and Motorola '040 gave the same result.
