Re: 6.99.32: panic when starting X

[Thomas Klausner <wiz%NetBSD.org@localhost>]

On Fri, Feb 28, 2014 at 05:02:40PM +0100, Thomas Klausner wrote:
> 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?

# addr2line -e /netbsd.6.99.33.debug.gdb -a ffffffff801517c1
0xffffffff801517c1
/usr/src/sys/arch/amd64/compile/KVOTHE.kmem/../../../../dev/ic/ahcisata_core.c:1784

Line 1784ff:
         if (drvp->drive_type != ATA_DRIVET_ATAPI) {
                 AHCIDEBUG_PRINT(("ahci_atapi_probe_device: drive %d "
                     "not present\n", target), DEBUG_PROBE);
                 return;
         }

 Thomas