lkml.org 
[lkml]   [2006]   [Jul]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    SubjectRe: 2.6.17-mm6
    From
    Date
    this is one for the networking people, and thus netdev


    On Tue, 2006-07-04 at 21:53 +0200, Rafael J. Wysocki wrote:
    > On Monday 03 July 2006 12:03, Andrew Morton wrote:
    > >
    > > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.17/2.6.17-mm6/
    > >
    > >
    > > - A major update to the e1000 driver.
    > >
    > > - 1394 updates
    >
    > Just found this in dmesg:
    >
    > =================================
    > [ INFO: inconsistent lock state ]
    > ---------------------------------
    > inconsistent {in-hardirq-W} -> {hardirq-on-W} usage.
    > nscd/4929 [HC0[0]:SC0[1]:HE1:SE0] takes:
    > (&skb_queue_lock_key){++..}, at: [<ffffffff8044fe40>] udp_ioctl+0x50/0xa0
    > {in-hardirq-W} state was registered at:
    > [<ffffffff8024b4fa>] lock_acquire+0x8a/0xc0
    > [<ffffffff80476e3f>] _spin_lock_irqsave+0x3f/0x60
    > [<ffffffff80408c25>] skb_queue_tail+0x25/0x60

    ok so skb_queue_lock is used in a hardirq context

    > [<ffffffff881c9517>] queue_packet_complete+0x27/0x40 [ieee1394]
    > [<ffffffff881c9d6b>] hpsb_packet_sent+0xab/0x100 [ieee1394]
    > [<ffffffff8822a4b5>] dma_trm_reset+0x115/0x140 [ohci1394]
    > [<ffffffff8822c512>] ohci_devctl+0x1c2/0x540 [ohci1394]
    > [<ffffffff881c9673>] hpsb_bus_reset+0x43/0xb0 [ieee1394]
    > [<ffffffff8822d7f6>] ohci_irq_handler+0x416/0x830 [ohci1394]
    > [<ffffffff802631ab>] handle_IRQ_event+0x2b/0x70
    > [<ffffffff80264dd4>] handle_level_irq+0xc4/0x130
    > [<ffffffff8020c762>] do_IRQ+0x112/0x130
    > [<ffffffff80209d90>] common_interrupt+0x64/0x65
    > irq event stamp: 4280
    > hardirqs last enabled at (4279): [<ffffffff8047606a>] trace_hardirqs_on_thunk+0x35/0x37
    > hardirqs last disabled at (4278): [<ffffffff804760a1>] trace_hardirqs_off_thunk+0x35/0x67
    > softirqs last enabled at (4258): [<ffffffff804065b5>] release_sock+0xd5/0xe0
    > softirqs last disabled at (4280): [<ffffffff804764d1>] _spin_lock_bh+0x11/0x50
    >
    > other info that might help us debug this:
    > no locks held by nscd/4929.
    >
    > stack backtrace:
    >
    > Call Trace:
    > [<ffffffff8020ab9f>] show_trace+0x9f/0x240
    > [<ffffffff8020af75>] dump_stack+0x15/0x20
    > [<ffffffff80249e52>] print_usage_bug+0x272/0x290
    > [<ffffffff8024a0d7>] mark_lock+0x267/0x5f0
    > [<ffffffff8024a9a6>] __lock_acquire+0x546/0xd10
    > [<ffffffff8024b4fb>] lock_acquire+0x8b/0xc0
    > [<ffffffff804764f4>] _spin_lock_bh+0x34/0x50
    > [<ffffffff8044fe40>] udp_ioctl+0x50/0xa0

    yet udp_ioctl takes it only for _bh

    > [<ffffffff80457359>] inet_ioctl+0x69/0x70
    > [<ffffffff804033ac>] sock_ioctl+0x22c/0x270
    > [<ffffffff802a32b1>] do_ioctl+0x31/0xa0
    > [<ffffffff802a35db>] vfs_ioctl+0x2bb/0x2e0
    > [<ffffffff802a366a>] sys_ioctl+0x6a/0xa0
    > [<ffffffff8020985a>] system_call+0x7e/0x83
    > [<00002b2d76ab98a9>]


    is this a real scenario, or is this a case of "firewire is special and
    needs it's own rules"?


    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2006-07-04 23:24    [W:4.205 / U:0.040 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site