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Message-Id: <200709191843.54902.m.kozlowski@tuxland.pl> Date: Wed, 19 Sep 2007 18:43:54 +0200 From: Mariusz Kozlowski <m.kozlowski@...land.pl> To: Cornelia Huck <cornelia.huck@...ibm.com> Cc: Andrew Morton <akpm@...ux-foundation.org>, linux-kernel@...r.kernel.org, Greg KH <gregkh@...e.de> Subject: Re: 2.6.23-rc6-mm1: atomic counter underflow 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...) On fresh boot it happens with mmc_core. On the next fresh boot it didn't happen with firewire_core. So you can be right that some of them are follow-on errors. Anyway to trigger it just run these commands: # logger -t "foobar" "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" # modprobe mmc_core # rmmod mmc_core # logger -t "foobar" "yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy" > Could you try with DEBUG_KOBJECT set? Please find it attached below. Regards, Mariusz xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx kobject mmc_core: registering. parent: <NULL>, set: module kobject holders: registering. parent: mmc_core, set: <NULL> kobject_uevent_env kobject filter function caused the event to drop! kobject_uevent_env fill_kobj_path: path = '/module/mmc_core' ---- begin silly warning ---- This is a janitorial warning, not a kernel bug. The kobject at, or inside 'mmc_bus_type'@(0xded0c1b0) is not dynamically allocated. kobjects must be dynamically allocated, not static ---- end silly warning ---- kobject mmc: registering. parent: <NULL>, set: bus kobject_uevent_env fill_kobj_path: path = '/bus/mmc' ---- begin silly warning ---- This is a janitorial warning, not a kernel bug. The kobject at, or inside 'mmc_bus_type'@(0xded0c290) is not dynamically allocated. kobjects must be dynamically allocated, not static ---- end silly warning ---- kobject devices: registering. parent: mmc, set: <NULL> kobject_uevent_env kobject filter function caused the event to drop! ---- begin silly warning ---- This is a janitorial warning, not a kernel bug. The kobject at, or inside 'mmc_bus_type'@(0xded0c220) is not dynamically allocated. kobjects must be dynamically allocated, not static ---- end silly warning ---- kobject drivers: registering. parent: mmc, set: <NULL> kobject_uevent_env kobject filter function caused the event to drop! ---- begin silly warning ---- This is a janitorial warning, not a kernel bug. The kobject at, or inside 'mmc_host_class'@(0xded0c4f8) is not dynamically allocated. kobjects must be dynamically allocated, not static ---- end silly warning ---- ---- begin silly warning ---- This is a janitorial warning, not a kernel bug. The kobject at, or inside 'mmc_host_class'@(0xded0c470) is not dynamically allocated. kobjects must be dynamically allocated, not static ---- end silly warning ---- kobject mmc_host: registering. parent: <NULL>, set: class kobject_uevent_env fill_kobj_path: path = '/class/mmc_host' ---- begin silly warning ---- This is a janitorial warning, not a kernel bug. The kobject at, or inside 'sdio_bus_type'@(0xded0c790) is not dynamically allocated. kobjects must be dynamically allocated, not static ---- end silly warning ---- kobject sdio: registering. parent: <NULL>, set: bus kobject_uevent_env fill_kobj_path: path = '/bus/sdio' ---- begin silly warning ---- This is a janitorial warning, not a kernel bug. The kobject at, or inside 'sdio_bus_type'@(0xded0c870) is not dynamically allocated. kobjects must be dynamically allocated, not static ---- end silly warning ---- kobject devices: registering. parent: sdio, set: <NULL> kobject_uevent_env kobject filter function caused the event to drop! ---- begin silly warning ---- This is a janitorial warning, not a kernel bug. The kobject at, or inside 'sdio_bus_type'@(0xded0c800) is not dynamically allocated. kobjects must be dynamically allocated, not static ---- end silly warning ---- kobject drivers: registering. parent: sdio, set: <NULL> kobject_uevent_env kobject filter function caused the event to drop! kobject drivers: unregistering kobject_uevent_env kobject filter function caused the event to drop! kobject drivers: cleaning up kobject '<NULL>' does not have a release() function, if this is not a directory kobject, it is broken and must be fixed. kobject devices: unregistering kobject_uevent_env kobject filter function caused the event to drop! kobject devices: cleaning up kobject '<NULL>' does not have a release() function, if this is not a directory kobject, it is broken and must be fixed. kobject sdio: unregistering kobject_uevent_env fill_kobj_path: path = '/bus/sdio' kobject sdio: cleaning up kobject '<NULL>' does not have a release() function, if this is not a directory kobject, it is broken and must be fixed. 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 [<c024c6cf>] kref_get+0x40/0x42 [<c024b852>] kobject_get+0x12/0x17 [<c02d5970>] bus_get+0x11/0x22 [<c02d5bf9>] bus_remove_file+0xe/0x27 [<c02d5c22>] remove_probe_files+0x10/0x1f [<c02d5c6c>] bus_unregister+0x3b/0x66 [<ded052bd>] sdio_unregister_bus+0xd/0xf [mmc_core] [<ded0666d>] mmc_exit+0xd/0x23 [mmc_core] [<c013c9d6>] sys_delete_module+0x154/0x202 [<c010406a>] sysenter_past_esp+0x5f/0x99 [<ffffe410>] 0xffffe410 ======================= kobject <NULL>: cleaning up kobject '<NULL>' does not have a release() function, if this is not a directory kobject, it is broken and must be fixed. 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 [<c024c6cf>] kref_get+0x40/0x42 [<c024b852>] kobject_get+0x12/0x17 [<c02d5970>] bus_get+0x11/0x22 [<c02d5bf9>] bus_remove_file+0xe/0x27 [<c02d5c2e>] remove_probe_files+0x1c/0x1f [<c02d5c6c>] bus_unregister+0x3b/0x66 [<ded052bd>] sdio_unregister_bus+0xd/0xf [mmc_core] [<ded0666d>] mmc_exit+0xd/0x23 [mmc_core] [<c013c9d6>] sys_delete_module+0x154/0x202 [<c010406a>] sysenter_past_esp+0x5f/0x99 [<ffffe410>] 0xffffe410 ======================= kobject <NULL>: cleaning up kobject '<NULL>' does not have a release() function, if this is not a directory kobject, it is broken and must be fixed. kobject <NULL>: unregistering kobject_uevent_env kobject filter function caused the event to drop! BUG: atomic counter underflow at: [<c0104a1c>] dump_trace+0x202/0x22b [<c0104a5f>] show_trace_log_lvl+0x1a/0x30 [<c0105608>] show_trace+0x12/0x14 [<c010572c>] dump_stack+0x15/0x17 [<c024c71d>] kref_put+0x4c/0xaf [<c024b74e>] kobject_put+0x14/0x16 [<c024b83d>] unlink+0x3b/0x3e [<c024b8ba>] kobject_del+0x16/0x19 [<c024b8ef>] kobject_unregister+0x32/0x3f [<c024b90b>] kset_unregister+0xf/0x11 [<c02d5c74>] bus_unregister+0x43/0x66 [<ded052bd>] sdio_unregister_bus+0xd/0xf [mmc_core] [<ded0666d>] mmc_exit+0xd/0x23 [mmc_core] [<c013c9d6>] sys_delete_module+0x154/0x202 [<c010406a>] sysenter_past_esp+0x5f/0x99 [<ffffe410>] 0xffffe410 ======================= kobject <NULL>: unregistering kobject_uevent_env kobject filter function caused the event to drop! BUG: atomic counter underflow at: [<c0104a1c>] dump_trace+0x202/0x22b [<c0104a5f>] show_trace_log_lvl+0x1a/0x30 [<c0105608>] show_trace+0x12/0x14 [<c010572c>] dump_stack+0x15/0x17 [<c024c71d>] kref_put+0x4c/0xaf [<c024b74e>] kobject_put+0x14/0x16 [<c024b83d>] unlink+0x3b/0x3e [<c024b8ba>] kobject_del+0x16/0x19 [<c024b8ef>] kobject_unregister+0x32/0x3f [<c024b90b>] kset_unregister+0xf/0x11 [<c02d5c7f>] bus_unregister+0x4e/0x66 [<ded052bd>] sdio_unregister_bus+0xd/0xf [mmc_core] [<ded0666d>] mmc_exit+0xd/0x23 [mmc_core] [<c013c9d6>] sys_delete_module+0x154/0x202 [<c010406a>] sysenter_past_esp+0x5f/0x99 [<ffffe410>] 0xffffe410 ======================= 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 [<c024c6cf>] kref_get+0x40/0x42 [<c024b852>] kobject_get+0x12/0x17 [<c02d5970>] bus_get+0x11/0x22 [<c02d5bf9>] bus_remove_file+0xe/0x27 [<c02d5c8b>] bus_unregister+0x5a/0x66 [<ded052bd>] sdio_unregister_bus+0xd/0xf [mmc_core] [<ded0666d>] mmc_exit+0xd/0x23 [mmc_core] [<c013c9d6>] sys_delete_module+0x154/0x202 [<c010406a>] sysenter_past_esp+0x5f/0x99 [<ffffe410>] 0xffffe410 ======================= kobject <NULL>: cleaning up kobject '<NULL>' does not have a release() function, if this is not a directory kobject, it is broken and must be fixed. kobject <NULL>: unregistering kobject_uevent_env BUG: atomic counter underflow at: [<c0104a1c>] dump_trace+0x202/0x22b [<c0104a5f>] show_trace_log_lvl+0x1a/0x30 [<c0105608>] show_trace+0x12/0x14 [<c010572c>] dump_stack+0x15/0x17 [<c024c71d>] kref_put+0x4c/0xaf [<c024b74e>] kobject_put+0x14/0x16 [<c024b83d>] unlink+0x3b/0x3e [<c024b8ba>] kobject_del+0x16/0x19 [<c024b8ef>] kobject_unregister+0x32/0x3f [<c024b90b>] kset_unregister+0xf/0x11 [<c024b915>] subsystem_unregister+0x8/0xa [<c02d5c93>] bus_unregister+0x62/0x66 [<ded052bd>] sdio_unregister_bus+0xd/0xf [mmc_core] [<ded0666d>] mmc_exit+0xd/0x23 [mmc_core] [<c013c9d6>] sys_delete_module+0x154/0x202 [<c010406a>] sysenter_past_esp+0x5f/0x99 [<ffffe410>] 0xffffe410 ======================= kobject mmc_host: unregistering kobject_uevent_env fill_kobj_path: path = '/class/mmc_host' kobject mmc_host: cleaning up kobject drivers: unregistering kobject_uevent_env kobject filter function caused the event to drop! kobject drivers: cleaning up kobject '<NULL>' does not have a release() function, if this is not a directory kobject, it is broken and must be fixed. kobject devices: unregistering kobject_uevent_env kobject filter function caused the event to drop! kobject devices: cleaning up kobject '<NULL>' does not have a release() function, if this is not a directory kobject, it is broken and must be fixed. kobject mmc: unregistering kobject_uevent_env fill_kobj_path: path = '/bus/mmc' kobject mmc: cleaning up kobject '<NULL>' does not have a release() function, if this is not a directory kobject, it is broken and must be fixed. kobject holders: unregistering kobject_uevent_env kobject filter function caused the event to drop! kobject holders: cleaning up kobject mmc_core: unregistering kobject_uevent_env fill_kobj_path: path = '/module/mmc_core' kobject mmc_core: cleaning up kobject '<NULL>' does not have a release() function, if this is not a directory kobject, it is broken and must be fixed. yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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