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    SubjectRe: [patch] Real-Time Preemption, -RT-2.6.9-rc4-mm1-U8
    From
    Ingo Molnar wrote:
    >
    >> >> RTNL: assertion failed at net/ipv4/devinet.c (1049)
    >> >
    >> > yeah - this too was an oversight i fixed in the latest upload.
    >>
    >> I don't think so. I still see plenty of those here.
    >>
    >> Is there an even more recent U8? I think you should consider add some
    >> dot numbering to each of the uploads... ;)
    >
    > indeed this most likely means there's a newer update :-| Please
    > double-check that the one you have is:
    >
    > $ md5sum realtime-preempt-2.6.9-rc4-mm1-U8
    > b59ae00ca0f45f545519348113af5c4f realtime-preempt-2.6.9-rc4-mm1-U8
    >

    That was it. Thanks.

    Now's some bad news:

    I getting the dump below, this time while plugging a flash memory stick,
    but right after that the system starts to behave preety bad and
    increasingly unresponsive. An hard-boot is almost the end of the (short)
    story :(

    (e.g. running jackd also hoses the complete system in no reproducible
    amount of time--sometimes short, other times long, like a random
    time-bomb).


    ohci_hcd 0000:00:0f.0: wakeup
    usb 2-1: new full speed USB device using address 2
    Initializing USB Mass Storage driver...
    scsi0 : SCSI emulation for USB Mass Storage devices
    usbcore: registered new driver usb-storage
    USB Mass Storage support registered.
    usb-storage: device found at 2
    usb-storage: waiting for device to settle before scanning
    ------------[ cut here ]------------
    kernel BUG at lib/rwsem-generic.c:598!
    invalid operand: 0000 [#1]
    PREEMPT
    Modules linked in: usb_storage vfat fat udf isofs nls_base realtime
    commoncap snd_seq_oss snd_seq_midi_event snd_seq snd_pcm_oss snd_mixer_oss
    snd_usb_usx2y snd_usb_lib snd_rawmidi snd_seq_device snd_hwdep snd_ali5451
    snd_ac97_codec snd_pcm snd_timer snd_page_alloc snd soundcore prism2_cs
    p80211 ds yenta_socket pcmcia_core natsemi crc32 loop subfs evdev ohci_hcd
    usbcore thermal processor fan button battery ac
    CPU: 0
    EIP: 0060:[<c01b7e30>] Not tainted VLI
    EFLAGS: 00010206 (2.6.9-rc4-mm1-RT-U8.3)
    EIP is at up_write+0x1d4/0x202
    eax: d2b2a000 ebx: 00000292 ecx: d2afe980 edx: d2ad4f40
    esi: d7b83b24 edi: dcb21000 ebp: d2b2bd6c esp: d2b2bd4c
    ds: 007b es: 007b ss: 0068 preempt: 00000001
    Process usb-stor (pid: 6699, threadinfo=d2b2a000 task=d2ad48b0)
    Stack: d2ad48b0 d2b2bd78 c02bea7f 00000001 d2ad48b0 00000292 d2afe980
    dcb21000
    d2b2bd84 e01ca139 d2afe980 d2b2bd84 00000292 dcb21138 d2b2bdac
    c022ed18
    d2afe980 c022ef1c c0231679 00000000 d2afe9d4 d2afe980 d2aa3800
    dcb21000
    Call Trace:
    [<c0104eb0>] show_stack+0x80/0x96 (28)
    [<c010504b>] show_registers+0x165/0x1de (56)
    [<c010525d>] die+0xf6/0x191 (64)
    [<c0105797>] do_invalid_op+0x10b/0x10d (188)
    [<c0104b0d>] error_code+0x2d/0x38 (100)
    [<e01ca139>] queuecommand+0x70/0x7c [usb_storage] (24)
    [<c022ed18>] scsi_dispatch_cmd+0x168/0x218 (40)
    [<c02342ed>] scsi_request_fn+0x1ee/0x42b (52)
    [<c0205612>] blk_insert_request+0xcd/0xfb (44)
    [<c0232f4f>] scsi_insert_special_req+0x3b/0x3f (28)
    [<c0233181>] scsi_wait_req+0x61/0x94 (60)
    [<c023529c>] scsi_probe_lun+0x8e/0x240 (68)
    [<c023588f>] scsi_probe_and_add_lun+0xb0/0x1be (48)
    [<c0236015>] scsi_scan_target+0xa4/0x123 (60)
    [<c0236121>] scsi_scan_channel+0x8d/0xa4 (48)
    [<c02361b1>] scsi_scan_host_selected+0x79/0xd4 (44)
    [<c023623d>] scsi_scan_host+0x31/0x33 (28)
    [<e01cccbd>] usb_stor_scan_thread+0x144/0x155 [usb_storage] (96)
    [<c0102305>] kernel_thread_helper+0x5/0xb (760037396)
    preempt count: 00000002
    . 2-level deep critical section nesting:
    .. entry 1: die+0x3a/0x191 / (do_invalid_op+0x10b/0x10d)
    .. entry 2: print_traces+0x16/0x4a / (show_stack+0x80/0x96)

    Code: e8 af f9 ff ff 89 f8 e8 f1 af f5 ff e9 35 ff ff ff 0f 0b a5 00 e3 e8
    2c c0 e9 da fe ff ff 0f 0b a4 00 e3 e8 2c c0 e9 c4 fe ff ff <0f> 0b 56 02
    6f 75 2d c0 e9 3c fe ff ff e8 7f 5b 10 00 e9 22 ff

    Bye.
    --
    rncbc aka Rui Nuno Capela
    rncbc@rncbc.org


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