lkml.org 
[lkml]   [2007]   [Sep]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: 2.6.23-rc6-mm1: atomic counter underflow
    On Tue, 18 Sep 2007 23:45:13 +0200,
    Mariusz Kozlowski <m.kozlowski@tuxland.pl> wrote:

    > Hello,
    >
    > I wrote a simple script that finds all modules in /lib/modules/`uname -r`
    > and performs sth like 'modprobe $x; rmmod $x;' for every of them. The result is the
    > output below. This actually happens when rmmod'ing a module.
    >
    > I narrowed it down to modules mmc_core and firewire_core. To reproduce that just
    > rmmod them.

    Hm, does that mean you can reproduce this when you modprobe/rmmod
    either of them on a fresh boot? (There could be follow-on errors...)

    Could you try with DEBUG_KOBJECT set?

    > PS. X doesn't work but that's another story.
    >
    > Regards,
    >
    > Mariusz
    >
    > WARNING: at lib/kref.c:33 kref_get()
    > [<c0104a1c>] dump_trace+0x202/0x22b
    > [<c0104a5f>] show_trace_log_lvl+0x1a/0x30
    > [<c0105608>] show_trace+0x12/0x14
    > [<c010572c>] dump_stack+0x15/0x17
    > [<c024c567>] kref_get+0x40/0x42
    > [<c024b81e>] kobject_get+0x12/0x17
    > [<c02d5800>] bus_get+0x11/0x22
    > [<c02d5a89>] bus_remove_file+0xe/0x27
    > [<c02d5ab2>] remove_probe_files+0x10/0x1f
    > [<c02d5afc>] bus_unregister+0x3b/0x66
    > [<dee3c2bd>] sdio_unregister_bus+0xd/0xf [mmc_core]
    > [<dee3d66d>] mmc_exit+0xd/0x23 [mmc_core]
    > [<c013c9d6>] sys_delete_module+0x154/0x202
    > [<c010406a>] sysenter_past_esp+0x5f/0x99
    > [<ffffe410>] 0xffffe410
    > =======================

    Is this the first error message you see? This looks like the embedded
    kset had its refcount decreased too much. (Or was the sdio bus never
    registered? Don't see how this could happen if mmc_init was successful,
    though.)

    (The next errors seem to have the same cause.)

    > modprobing: firewire-core
    > WARNING: at lib/kref.c:33 kref_get()
    > [<c0104a1c>] dump_trace+0x202/0x22b
    > [<c0104a5f>] show_trace_log_lvl+0x1a/0x30
    > [<c0105608>] show_trace+0x12/0x14
    > [<c010572c>] dump_stack+0x15/0x17
    > [<c024c567>] kref_get+0x40/0x42
    > [<c024b81e>] kobject_get+0x12/0x17
    > [<c024b97b>] kobject_init+0x43/0x82
    > [<c024b9c8>] kset_init+0xe/0x2e
    > [<c024be4f>] kset_register+0x15/0x38
    > [<c024be7a>] subsystem_register+0x8/0xa
    > [<c02d6008>] bus_register+0x65/0x209
    > [<ded6300d>] fw_core_init+0xd/0x99 [firewire_core]
    > [<c013aceb>] sys_init_module+0x125/0x1612
    > [<c010406a>] sysenter_past_esp+0x5f/0x99
    > [<ffffe410>] 0xffffe410

    Strange. Can't see how this can happen except as a follow-on error.

    (Next ones are follow-on errors from this one.)

    > modprobing: mmc_block

    (Following errors don't look like they could have anything to do with
    the driver core.)

    -
    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: 2007-09-19 10:31    [W:0.054 / U:0.172 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site