On Sun, 18 Jun 2006, Corey Minyard wrote:
> The IPMI driver spawns a low-priority thread that will poll the driver
> when it finds there is something to do. It's possible that the hardware
> is not setting things properly and is always telling the driver it has
> to do something. It's possible that the new version of the firmware
> enabled interrupts; I think there's a problem with the driver here; it
> should not really enable the kernel thread if interrupts are working.
> The driver should also probably call schedule() instead of udelay() in
> the kernel thread when a short timeout is requested by the state machine.
>
> In either situation, the kernel thread will sit there and spin, and if
> nothing else is scheduled for 10 seconds on that CPU you will get that
> warning. Can you check a few things for me?
>
> cat /proc/ipmi/0/si_stats and send me the output.
After running for about 35 minutes (and one instance of the soft lockup
warning):
| interrupts_enabled: 0
| short_timeouts: 8835
| long_timeouts: 263709
| timeout_restarts: 0
| idles: 793108
| interrupts: 0
| attentions: 0
| flag_fetches: 2137
| hosed_count: 0
| complete_transactions: 3516
| events: 0
| watchdog_pretimeouts: 0
| incoming_messages: 0
> If you do "top", is the kipmi0 always running?
Yes, running since the system started around 11:00:
| root 1331 0.8 0.0 0 0 ? SN 10:59 0:17 \_ [kipmi0]
> Is your IPMI interface KCS or SMIC? The IPMI driver should report this
> in the system log at startup.
It's KCS:
| laura:~# dmesg | grep -i ipmi
| [ 85.110244] ipmi message handler version 39.0
| [ 85.111491] ipmi device interface
| [ 85.127866] IPMI System Interface driver.
| [ 85.127929] ipmi_si: Trying SMBIOS-specified KCS state machine at I/O
address 0xca2, slave address 0x20, irq 0
| [ 85.274699] ipmi: Found new BMC (man_id: 0x000f85, prod_id: 0x0000,
dev_id: 0x00)
| [ 85.274852] IPMI KCS interface initialized
| [ 85.284710] IPMI Watchdog: driver initialized
Cheers,
Peter
--
| .''`. ** Debian GNU/Linux **
Peter Palfrader | : :' : The universal
http://www.palfrader.org/ | `. `' Operating System
| `- http://www.debian.org/
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