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