Re: "BUG: soft lockup" on A1200; was: Re: Updated installation images for Debian Ports 2019-04-20
Hi Michael,
On Mon, Jun 17, 2019 at 11:22 PM Michael Schmitz <schmitzmic@gmail.com> wrote:
> 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.
That comes from drivers/ide/ide-probe.c:ide_dev_read_id().
Looking at the code, it may be caused by the drive, too.
I do not see it on A4000.
W.r.t. completing the probe, a log with dump_stack() added was sent
to me by PM, and I replied the below:
>From that log, I'm wondering if something is stuck in ide_probe_port().
Can you sprinkle some debug prints
printk("%s:%u\n", __func__, __LINE__);
in ide_probe_port() and probe_for_drive() (drivers/ide/ide-probe.c) and retry?
Thanks!
FTR, I've just booted my A4000 with a v5.2-rc5-based kernel, and IDE
(Gayle, single drive) works. But old Debian, no systemd.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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