Re: [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm2-V0.7.30-9

[Fernando Lopez-Lezcano]

On Tue, 2004-11-23 at 09:58, Ingo Molnar wrote:
> i have released the -V0.7.30-9 Real-Time Preemption patch, which can be
> downloaded from the usual place:
> 
>     http://redhat.com/~mingo/realtime-preempt/
> 
> this is a fixes-only release.

Using PREEMPT_DESKTOP I see a irq related problem with my network
interface:

cat /proc/interrupts
           CPU0       
  0:     134209    IO-APIC-edge  timer  0/34148
  1:        221    IO-APIC-edge  i8042  0/221
  8:          1    IO-APIC-edge  rtc  0/1
  9:          0   IO-APIC-level  acpi  0/0
 11:          0    IO-APIC-edge  radeon@PCI:1:0:0  0/0
 12:       2215    IO-APIC-edge  i8042  0/2215
 14:        650    IO-APIC-edge  ide0  2/648
 16:     100000   IO-APIC-level  eth0  0/0
 17:         59   IO-APIC-level  libata, libata  0/59
 18:          0   IO-APIC-level  ICE1712  0/0
 20:      15160   IO-APIC-level  libata  0/15160
 21:          0   IO-APIC-level  ehci_hcd, uhci_hcd, uhci_hcd, uhci_hcd,
uhci_hcd  0/0
NMI:          0 
LOC:     134034 
ERR:          0
MIS:          0

relevant portion of dmesg:
ip_tables: (C) 2000-2002 Netfilter core team
ip_conntrack version 2.1 (8192 buckets, 65536 max) - 304 bytes per
conntrack
r8169 Gigabit Ethernet driver 1.6LK loaded
ACPI: PCI interrupt 0000:00:0b.0[A] -> GSI 16 (level, low) -> IRQ 16
divert: allocating divert_blk for eth0
eth0: Identified chip type is 'RTL8169s/8110s'.
eth0: RTL8169 at 0xf88b6f00, 00:0c:76:b3:c2:43, IRQ 16
IRQ#16 thread RT prio: 40.
hm: ioapic cache empty for irq 16 (e:00000000/d:00010000) 0001a9c1
r8169: eth0: link up
Bluetooth: Core ver 2.7
NET: Registered protocol family 31
Bluetooth: HCI device and connection manager initialized
Bluetooth: HCI socket layer initialized
Bluetooth: L2CAP ver 2.5
Bluetooth: L2CAP socket layer initialized
Bluetooth: RFCOMM ver 1.3
Bluetooth: RFCOMM socket layer initialized
Bluetooth: RFCOMM TTY layer initialized
IRQ#4 thread RT prio: 39.
parport_pc: Ignoring new-style parameters in presence of obsolete ones
parport0: PC-style at 0x378 (0x778) [PCSPP,TRISTATE,EPP]
parport0: irq 7 detected
lp0: using parport0 (polling).
lp0: console ready
NET: Registered protocol family 10
Disabled Privacy Extensions on device c03d7e80(lo)
IPv6 over IPv4 tunneling driver
divert: not allocating divert_blk for non-ethernet device sit0
eth0: no IPv6 routers present
[drm] Initialized radeon 1.11.0 20020828 on minor 0: 
ACPI: PCI interrupt 0000:01:00.0[A] -> GSI 16 (level, low) -> IRQ 16
agpgart: Found an AGP 3.0 compliant device at 0000:00:00.0.
agpgart: Putting AGP V3 device at 0000:00:00.0 into 4x mode
agpgart: Putting AGP V3 device at 0000:01:00.0 into 4x mode
[drm] Loading R200 Microcode
IRQ#11 thread RT prio: 38.
irq 16: nobody cared!
 [<c0104173>] dump_stack+0x23/0x30 (20)
 [<c0147970>] __report_bad_irq+0x30/0xa0 (24)
 [<c0147a80>] note_interrupt+0x70/0xb0 (32)
 [<c01477dc>] do_hardirq+0x13c/0x150 (40)
 [<c0147889>] do_irqd+0x99/0xd0 (32)
 [<c0139fda>] kthread+0xaa/0xb0 (48)
 [<c0101335>] kernel_thread_helper+0x5/0x10 (153083924)
---------------------------
| preempt count: 00000002 ]
| 2-level deep critical section nesting:
----------------------------------------
.. [<c014777a>] .... do_hardirq+0xda/0x150
.....[<c0147889>] ..   ( <= do_irqd+0x99/0xd0)
.. [<c013c98d>] .... print_traces+0x1d/0x60
.....[<c0104173>] ..   ( <= dump_stack+0x23/0x30)

handlers:
[<f892ce60>] (rtl8169_interrupt+0x0/0x140 [r8169])
Disabling IRQ #16
ACPI: PCI interrupt 0000:00:07.0[A] -> GSI 18 (level, low) -> IRQ 18
IRQ#18 thread RT prio: 37.
hm: ioapic cache empty for irq 18 (e:00000000/d:00010000) 0001a9c9


output of lspci -v for the card:
00:0b.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8169
Gigabit Ethernet (rev 10)
	Subsystem: Micro-Star International Co., Ltd.: Unknown device 702c
	Flags: bus master, 66Mhz, medium devsel, latency 32, IRQ 16
	I/O ports at d000 [size=cffa0000]
	Memory at cfffef00 (32-bit, non-prefetchable) [size=256]
	Expansion ROM at 00020000 [disabled]
	Capabilities: [dc] Power Management version 2

-- Fernando


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