Re: "BUG: soft lockup" on A1200; was: Re: Updated installation images for Debian Ports 2019-04-20

[Michael Schmitz <schmitzmic@gmail.com>]

Hi Szymon,

On 15/06/19 11:15 AM, Finn Thain wrote:
> On Wed, 12 Jun 2019, Szymon Bieganski wrote:
>
> > Here is the end of dmesg (full log in attachment) when kernel stalls,
> > just as before:
> >
> > ------------------------
> >
> > [  122.430000] This architecture does not have kernel memory protection.
> > [  122.440000] Run /init as init process
> > [  126.690000] calling  ide_init+0x0/0x7c [ide_core] @ 43
> > [  126.700000] Uniform Multi-Platform E-IDE driver
> > [  126.710000] initcall ide_init+0x0/0x7c [ide_core] returned 0 after
> > 7988 usecs
> > [  126.980000] calling  amiga_gayle_ide_driver_init+0x0/0x1c [gayle] @ 43
> > [  126.990000] ide: Gayle IDE controller (A1200 style)
> > [  127.000000] Probing IDE interface ide0...
> > [  127.390000] hda: probing with STATUS(0x50) instead of ALTSTATUS(0x0a)
> > [  127.540000] hda: SAMSUNG MP0402H, ATA DISK drive
> > [  127.610000] Z2RAM: using 0K Zorro II RAM and 512K Chip RAM (Total 512K)
> > [  127.980000] hdb: probing with STATUS(0x00) instead of ALTSTATUS(0x0a)
> > [  128.200000] hdb: probing with STATUS(0x00) instead of ALTSTATUS(0x0a)
> > [  148.570000] watchdog: BUG: soft lockup - CPU#0 stuck for 22s!
> > [systemd-udevd:43]

Finn has raised the issue of systemd's short timeouts before. I'm 
wondering whether that's part of your problem here. But the IDE driver 
probe for a second disk should eventually complete, regardless of 
systemd's udev module crashing?

Not sure whether the 'probing with STATUS instead of ALTSTATUS' message 
is normal for the A1200. Geert might remember that sort of detail.

> > [  148.570000] Modules linked in: gayle(+) ide_core
> > [  148.570000] Format 00  Vector: 0078  PC: 00050b58  Status: 2200
> > Not tainted
> > [  148.570000] ORIG_D0: ffffffff  D0: 00000064  A2: 0151ef90  A1: 80bfe001
> > [  148.570000] A0: 003f0c12  D5: 00000000  D4: 0000000a
> > [  148.570000] D3: 00400140  D2: 00000001  D1: 8e6f286a
> > [  759.250000] amikbd: Ctrl-Amiga-Amiga reset warning!!
> > [  759.260000] amikbd: Ctrl-Amiga-Amiga reset warning!!
> > ------------------------
> >
> > If you see a difference in detection of IDE devices, it's due to fact
> > that I disconnected all but the master hard disk.
> If you are willing to build your own kernel, you could try a different
> driver:
>
> CONFIG_IDE=n
> CONFIG_ATA=y
> CONFIG_ATA_SFF=y
> CONFIG_PATA_GAYLE=y

IIRC Adrian has built the installer kernel with PATA driver support. You 
might just need

modprobe.blacklist=gayle

in the boot options to switch to using PATA.

Cheers,

    Michael