On Tue, Feb 19, 2008 at 09:19:25AM +0100, Kay Sievers wrote: > On Feb 18, 2008 1:59 PM, Andrew Morton <[EMAIL PROTECTED]> wrote: > > On Fri, 15 Feb 2008 14:08:53 +0300 Alexey Dobriyan <[EMAIL PROTECTED]> > > 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' -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/