From: Alexey Dobriyan <adobriyan@sw.ru>
To: Kay Sievers <kay.sievers@vrfy.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, Greg KH <greg@kroah.com>
Subject: Re: 2.6.25-rc1-sha1: WARNING: at lib/kref.c:43 kref_get+0x20/0x30()
Date: Tue, 19 Feb 2008 15:03:52 +0300 [thread overview]
Message-ID: <20080219120352.GA8367@localhost.sw.ru> (raw)
In-Reply-To: <3ae72650802190019u76857e61n4ee543d33fd3c5fc@mail.gmail.com>
On Tue, Feb 19, 2008 at 09:19:25AM +0100, Kay Sievers wrote:
> On Feb 18, 2008 1:59 PM, Andrew Morton <akpm@linux-foundation.org> wrote:
> > On Fri, 15 Feb 2008 14:08:53 +0300 Alexey Dobriyan <adobriyan@sw.ru> wrote:
> >
> > > Booting without SYSFS fills dmesg like this
> >
> > Does the system normally boot without sysfs? Surprised.
> >
> >
> > > ------------[ cut here ]------------
> > > WARNING: at lib/kref.c:43 kref_get+0x20/0x30()
> > > Modules linked in: loop(+)
> > > Pid: 994, comm: modprobe Tainted: G M 2.6.25-rc1 #6
> > >
> > > Call Trace:
> > > [<ffffffff802317f4>] warn_on_slowpath+0x64/0x90
> > > [<ffffffff8028db08>] init_object+0x88/0xa0
> > > [<ffffffff8028f55e>] __slab_alloc+0xbe/0x550
> > > [<ffffffff8031aa28>] kvasprintf+0x58/0x90
> > > [<ffffffff8031874c>] vsnprintf+0x33c/0x6e0
> > > [<ffffffff8031aa41>] kvasprintf+0x71/0x90
> > > [<ffffffff8022c597>] hrtick_set+0x77/0x140
> > > [<ffffffff80314860>] kref_get+0x20/0x30
> > > [<ffffffff80313932>] kobject_get+0x12/0x20
> > > [<ffffffff803139f9>] kobject_add_internal+0x49/0xf0
> > > [<ffffffff80313bb3>] kobject_add_varg+0x73/0x80
> > > [<ffffffff80313fa4>] kobject_add+0x54/0x80
> > > [<ffffffff8028ec53>] check_object+0x103/0x230
> > > [<ffffffff8028db08>] init_object+0x88/0xa0
> > > [<ffffffff80313744>] kobject_create+0x14/0x40
> > > [<ffffffff8028fbd3>] kmem_cache_alloc+0xd3/0xe0
> > > [<ffffffff803136b4>] kobject_init+0x34/0xb0
> > > [<ffffffff8031375b>] kobject_create+0x2b/0x40
> > > [<ffffffff8031400c>] kobject_create_and_add+0x3c/0x80
> > > [<ffffffff8025e137>] load_module+0x1847/0x1970
> > > [<ffffffff80288800>] alloc_pages_current+0x0/0x90
> > > [<ffffffff8025e2c2>] sys_init_module+0x62/0x1a0
> > >
> >
> > Is this a regression?
>
> Alexey,
> do you always see these messages with every modprobe of a module?
Yep.
> Can you enable CONFIG_DEBUG_KOBJECT=y? It might give a hint where we
> miss to initialization of a kobject when sysfs is not compiled in.
It looks like this:
kobject: 'button' (ffff81017f307248): kobject_uevent_env
kobject: 'button' (ffff81017f307248): fill_kobj_path: path = '/bus/acpi/drivers/button'
------------[ cut here ]------------
WARNING: at lib/kref.c:43 kref_get+0x2d/0x30()
Modules linked in: battery(+) button dock thermal processor sbs ac sbshc af_packet loop
Pid: 1642, comm: modprobe Not tainted 2.6.25-rc2 #2
Call Trace:
[<ffffffff8022a8cf>] warn_on_slowpath+0x5f/0x80
[<ffffffff8024cb06>] ? mark_held_locks+0x56/0xa0
[<ffffffff80282c00>] ? __slab_alloc+0xc0/0x4b0
[<ffffffff8024cc9f>] ? trace_hardirqs_on+0xbf/0x150
[<ffffffff802f7f87>] ? kvasprintf+0x57/0x90
[<ffffffff802f5c18>] ? vsnprintf+0x328/0x6e0
[<ffffffff802f7fa0>] ? kvasprintf+0x70/0x90
[<ffffffff802f1ced>] kref_get+0x2d/0x30
[<ffffffff802f0c4a>] kobject_get+0x1a/0x30
[<ffffffff802f0d39>] kobject_add_internal+0x59/0x160
[<ffffffff802f0f6e>] kobject_add_varg+0x6e/0x80
[<ffffffff802f1399>] kobject_add+0x69/0x90
[<ffffffff8024cc9f>] ? trace_hardirqs_on+0xbf/0x150
[<ffffffff802f1c4e>] ? kref_init+0xe/0x10
[<ffffffff802f0927>] ? kobject_init+0x37/0xa0
[<ffffffff802f09c3>] ? kobject_create+0x33/0x40
[<ffffffff802f13fe>] kobject_create_and_add+0x3e/0x80
[<ffffffff80255adf>] sys_init_module+0x19df/0x1b30
[<ffffffff8024d928>] ? __lock_acquire+0x748/0x10b0
[<ffffffff803249a0>] ? acpi_bus_register_driver+0x0/0x40
[<ffffffff8024cc9f>] ? trace_hardirqs_on+0xbf/0x150
[<ffffffff80406122>] ? trace_hardirqs_on_thunk+0x35/0x3a
[<ffffffff8020b57b>] system_call_after_swapgs+0x7b/0x80
---[ end trace 033c2b23880cf02a ]---
kobject: 'notes' (ffff81017ec370a8): kobject_add_internal: parent: '<NULL>', set: '<NULL>'
kobject: 'battery' (ffff81017f382db0): kobject_add_internal: parent: 'drivers', set: 'drivers'
kobject: 'battery' (ffff81017f382db0): kobject_uevent_env
kobject: 'battery' (ffff81017f382db0): fill_kobj_path: path = '/bus/acpi/drivers/battery'
------------[ cut here ]------------
WARNING: at lib/kref.c:43 kref_get+0x2d/0x30()
Modules linked in: bay(+) battery button dock thermal processor sbs ac sbshc af_packet loop
Pid: 1650, comm: modprobe Not tainted 2.6.25-rc2 #2
Call Trace:
[<ffffffff8022a8cf>] warn_on_slowpath+0x5f/0x80
[<ffffffff8024cb06>] ? mark_held_locks+0x56/0xa0
[<ffffffff80282c00>] ? __slab_alloc+0xc0/0x4b0
[<ffffffff8024cc9f>] ? trace_hardirqs_on+0xbf/0x150
[<ffffffff802f7f87>] ? kvasprintf+0x57/0x90
[<ffffffff802f5c18>] ? vsnprintf+0x328/0x6e0
[<ffffffff802f7fa0>] ? kvasprintf+0x70/0x90
[<ffffffff802f1ced>] kref_get+0x2d/0x30
[<ffffffff802f0c4a>] kobject_get+0x1a/0x30
[<ffffffff802f0d39>] kobject_add_internal+0x59/0x160
[<ffffffff802f0f6e>] kobject_add_varg+0x6e/0x80
[<ffffffff802f1399>] kobject_add+0x69/0x90
[<ffffffff8024cc9f>] ? trace_hardirqs_on+0xbf/0x150
[<ffffffff802f1c4e>] ? kref_init+0xe/0x10
[<ffffffff802f0927>] ? kobject_init+0x37/0xa0
[<ffffffff802f09c3>] ? kobject_create+0x33/0x40
[<ffffffff802f13fe>] kobject_create_and_add+0x3e/0x80
[<ffffffff80255adf>] sys_init_module+0x19df/0x1b30
[<ffffffff8024d928>] ? __lock_acquire+0x748/0x10b0
[<ffffffff80353510>] ? device_remove_file+0x0/0x10
[<ffffffff8024cc9f>] ? trace_hardirqs_on+0xbf/0x150
[<ffffffff80406122>] ? trace_hardirqs_on_thunk+0x35/0x3a
[<ffffffff8020b57b>] system_call_after_swapgs+0x7b/0x80
---[ end trace 033c2b23880cf02a ]---
kobject: 'notes' (ffff81017ec371f8): kobject_add_internal: parent: '<NULL>', set: '<NULL>'
kobject: '<NULL>' (ffffffff88031350): kobject_cleanup
------------[ cut here ]------------
WARNING: at lib/kref.c:43 kref_get+0x2d/0x30()
Modules linked in: fan(+) battery button dock thermal processor sbs ac sbshc af_packet loop
Pid: 1659, comm: modprobe Not tainted 2.6.25-rc2 #2
Call Trace:
[<ffffffff8022a8cf>] warn_on_slowpath+0x5f/0x80
[<ffffffff8024cb06>] ? mark_held_locks+0x56/0xa0
[<ffffffff80282c00>] ? __slab_alloc+0xc0/0x4b0
[<ffffffff8024cc9f>] ? trace_hardirqs_on+0xbf/0x150
[<ffffffff802f7f87>] ? kvasprintf+0x57/0x90
[<ffffffff802f5c18>] ? vsnprintf+0x328/0x6e0
[<ffffffff802f7fa0>] ? kvasprintf+0x70/0x90
[<ffffffff802f1ced>] kref_get+0x2d/0x30
[<ffffffff802f0c4a>] kobject_get+0x1a/0x30
[<ffffffff802f0d39>] kobject_add_internal+0x59/0x160
[<ffffffff802f0f6e>] kobject_add_varg+0x6e/0x80
[<ffffffff802f1399>] kobject_add+0x69/0x90
[<ffffffff8024cc9f>] ? trace_hardirqs_on+0xbf/0x150
[<ffffffff802f1c4e>] ? kref_init+0xe/0x10
[<ffffffff802f0927>] ? kobject_init+0x37/0xa0
[<ffffffff802f09c3>] ? kobject_create+0x33/0x40
[<ffffffff802f13fe>] kobject_create_and_add+0x3e/0x80
[<ffffffff80255adf>] sys_init_module+0x19df/0x1b30
[<ffffffff8024d928>] ? __lock_acquire+0x748/0x10b0
[<ffffffff803249a0>] ? acpi_bus_register_driver+0x0/0x40
[<ffffffff8024cc9f>] ? trace_hardirqs_on+0xbf/0x150
[<ffffffff80406122>] ? trace_hardirqs_on_thunk+0x35/0x3a
[<ffffffff8020b57b>] system_call_after_swapgs+0x7b/0x80
---[ end trace 033c2b23880cf02a ]---
kobject: 'notes' (ffff81017ec372a0): kobject_add_internal: parent: '<NULL>', set: '<NULL>'
kobject: 'fan' (ffff81017f307db0): kobject_add_internal: parent: 'drivers', set: 'drivers'
kobject: 'fan' (ffff81017f307db0): kobject_uevent_env
kobject: 'fan' (ffff81017f307db0): fill_kobj_path: path = '/bus/acpi/drivers/fan'
------------[ cut here ]------------
WARNING: at lib/kref.c:43 kref_get+0x2d/0x30()
Modules linked in: container(+) fan battery button dock thermal processor sbs ac sbshc af_packet loop
Pid: 1667, comm: modprobe Not tainted 2.6.25-rc2 #2
Call Trace:
[<ffffffff8022a8cf>] warn_on_slowpath+0x5f/0x80
[<ffffffff8024cb06>] ? mark_held_locks+0x56/0xa0
[<ffffffff80282c00>] ? __slab_alloc+0xc0/0x4b0
[<ffffffff8024cc9f>] ? trace_hardirqs_on+0xbf/0x150
[<ffffffff802f7f87>] ? kvasprintf+0x57/0x90
[<ffffffff802f5c18>] ? vsnprintf+0x328/0x6e0
[<ffffffff802f7fa0>] ? kvasprintf+0x70/0x90
[<ffffffff802f1ced>] kref_get+0x2d/0x30
[<ffffffff802f0c4a>] kobject_get+0x1a/0x30
[<ffffffff802f0d39>] kobject_add_internal+0x59/0x160
[<ffffffff802f0f6e>] kobject_add_varg+0x6e/0x80
[<ffffffff802f1399>] kobject_add+0x69/0x90
[<ffffffff8024cc9f>] ? trace_hardirqs_on+0xbf/0x150
[<ffffffff802f1c4e>] ? kref_init+0xe/0x10
[<ffffffff802f0927>] ? kobject_init+0x37/0xa0
[<ffffffff802f09c3>] ? kobject_create+0x33/0x40
[<ffffffff802f13fe>] kobject_create_and_add+0x3e/0x80
[<ffffffff80255adf>] sys_init_module+0x19df/0x1b30
[<ffffffff8024d928>] ? __lock_acquire+0x748/0x10b0
[<ffffffff803249a0>] ? acpi_bus_register_driver+0x0/0x40
[<ffffffff8024cc9f>] ? trace_hardirqs_on+0xbf/0x150
[<ffffffff80406122>] ? trace_hardirqs_on_thunk+0x35/0x3a
[<ffffffff8020b57b>] system_call_after_swapgs+0x7b/0x80
---[ end trace 033c2b23880cf02a ]---
kobject: 'notes' (ffff81017ec37498): kobject_add_internal: parent: '<NULL>', set: '<NULL>'
kobject: 'container' (ffff81017f307000): kobject_add_internal: parent: 'drivers', set: 'drivers'
kobject: 'container' (ffff81017f307000): kobject_uevent_env
kobject: 'container' (ffff81017f307000): fill_kobj_path: path = '/bus/acpi/drivers/container'
next prev parent reply other threads:[~2008-02-19 12:04 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-15 11:08 2.6.25-rc1-sha1: WARNING: at lib/kref.c:43 kref_get+0x20/0x30() Alexey Dobriyan
2008-02-18 12:59 ` Andrew Morton
2008-02-19 8:19 ` Kay Sievers
2008-02-19 12:03 ` Alexey Dobriyan [this message]
2008-02-19 13:10 ` Kay Sievers
2008-02-19 15:56 ` Alexey Dobriyan
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20080219120352.GA8367@localhost.sw.ru \
--to=adobriyan@sw.ru \
--cc=akpm@linux-foundation.org \
--cc=greg@kroah.com \
--cc=kay.sievers@vrfy.org \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.