On Mon, Feb 24, 2014 at 08:01:58AM +0000, Nick Hudson wrote: > Trying kmem_guard_depth might pick something up - see kmem(9)
I've tried a kernel with options DEBUG options KMEM_GUARD_DEPTH=30000 but that doesn't even finish boot. In 2/2 tries it stops with: cd0 at atapibus0 drive 0: ... uvm_fault(0xf..80fb9380, 0xffff8000054ad9000, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip f...801517c1 cs8 rflags 10206 cr2 ffff800054ad9004 ilevel 0 rsp f...e815150cb00 curlwp 0xf...e81510b8040 pid 0.114 lowest kstack 0xf...e81515092c0 kernel: page fault trap, code=0 Stopped in pid 0.114 (system) at netbsd:ahci_atapi_probe_device+0x91: m ovzbl 4(%rcx,%rbx,1),%eax db{0}> Ideas? Thomas