Hi Ingo, I'm seeing this on 2.6.21.5-rt14 and 2.6.21.5-rt15, this problem did not happen in 2.6.21.3-rt9 (last I checked on this hardware). The computer is an athlon x2 and eth0 is "alias eth0 skge", the BUGs trigger on network activity (but not a constant stream of them)...
BUG: scheduling with irqs disabled: IRQ-20/0x00000000/1246 caller is wait_for_completion+0x65/0x9b [<c0105f44>] dump_trace+0x64/0x105 [<c0105ffd>] show_trace_log_lvl+0x18/0x2c [<c010660a>] show_trace+0xf/0x11 [<c010668b>] dump_stack+0x12/0x14 [<c032ba36>] schedule+0x86/0xfa [<c032bb0f>] wait_for_completion+0x65/0x9b [<c0125f24>] set_cpus_allowed+0x71/0x8f [<c012f867>] do_softirq_from_hardirq+0xbd/0xda [<c015a336>] do_irqd+0x1ff/0x24d [<c013be5c>] kthread+0xb0/0xd8 [<c0105b7b>] kernel_thread_helper+0x7/0x10 ======================= [EMAIL PROTECTED] ~]# cat /proc/interrupts CPU0 CPU1 0: 251 1 IO-APIC-edge timer 1: 0 2 IO-APIC-edge i8042 6: 0 6 IO-APIC-edge floppy 7: 1 0 IO-APIC-edge parport0 8: 0 1 IO-APIC-edge rtc 9: 0 0 IO-APIC-fasteoi acpi 12: 0 4 IO-APIC-edge i8042 14: 0 3724 IO-APIC-edge ide0 16: 7591 5688 IO-APIC-fasteoi ohci_hcd:usb1, libata 17: 1 238 IO-APIC-fasteoi ohci_hcd:usb2, NVidia CK8S 18: 0 3 IO-APIC-fasteoi ehci_hcd:usb3 19: 0 0 IO-APIC-fasteoi libata 20: 0 3028 IO-APIC-fasteoi eth0 21: 0 2 IO-APIC-fasteoi ohci1394, ICE1712 22: 17253 5916 IO-APIC-fasteoi [EMAIL PROTECTED]:0000:01:00.0 NMI: 0 0 LOC: 32953 36858 ERR: 1 MIS: 0 -- Fernando - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/