On Fri, 5 Aug 2016, Marcin Mirosław wrote: > Hi! > Kernel is on commit 1c99b8fdce303e0961ee982919c890bf156ed775. > Host is freshly rebooted. > # grep bcache /proc/modules > # modprobe bcache && rmmod bcache && modprobe bcache > modprobe: ERROR: could not insert 'bcache': Cannot allocate memory > > In dmesg I've got: > > Aug 5 15:39:14 localhost kernel: [ 249.911487] WARNING: CPU: 3 PID: 17892 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x5d/0x70 > > Aug 5 15:39:14 localhost kernel: [ 249.911490] sysfs: cannot create duplicate filename '/devices/virtual/bcache' Hmm, it looks like something in sysfs might not get unregistered at module unload time, so reloading it causes the warning. Are you using bcache or bcachefs? I don't see bch_fs_init() in 4.7: http://lxr.free-electrons.com/ident?i=bch_fs_init < empty > If bcachefs, please update the subject when you reply. -- Eric Wheeler > > Aug 5 15:39:14 localhost kernel: [ 249.911493] Modules linked in: bcache(+) libcrc32c tun spadfs(O) mousedev vboxnetadp(O) vboxnetflt(O) nouveau vboxdrv(O) wmi video backlight i2c_algo_bit ttm fbcon bitblit softcursor font coretemp drm_kms_helper hwmon cfbfillrect syscopyarea kvm_intel snd_ens1371 snd_ac97_codec cfbimgblt kvm sysfillrect ac97_bus snd_rawmidi sysimgblt snd_pcm fb_sys_fops cfbcopyarea snd_timer snd drm 8250 8250_base e1000e irqbypass agpgart ptp fb soundcore fbdev pps_core serial_core evdev psmouse lpc_ich acpi_cpufreq button i2c_i801 i82975x_edac processor edac_core mfd_core zfs(PO) zunicode(PO) zcommon(PO) znvpair(PO) spl(O) zlib_deflate zavl(PO) sr_mod cdrom sata_sil [last unloaded: bcache] > > Aug 5 15:39:14 localhost kernel: [ 249.911566] CPU: 3 PID: 17892 Comm: modprobe Tainted: P O 4.7.0-bcache+ #4 > > Aug 5 15:39:14 localhost kernel: [ 249.911568] Hardware name: /D975XBX, BIOS BX97510J.86A.1487.2007.0902.1724 09/02/2007 > > Aug 5 15:39:14 localhost kernel: [ 249.911571] 0000000000000286 00000000e7ecea9b ffff88008e937998 ffffffff812cbf1d > > Aug 5 15:39:14 localhost kernel: [ 249.911576] ffff88008e9379e8 0000000000000000 ffff88008e9379d8 ffffffff810591b6 > > Aug 5 15:39:14 localhost kernel: [ 249.911579] 0000001f4a2f3000 ffff8800b95d1000 ffff8800cf26abc8 ffff88014a2f7ac8 > > Aug 5 15:39:14 localhost kernel: [ 249.911583] Call Trace: > > Aug 5 15:39:14 localhost kernel: [ 249.911590] [<ffffffff812cbf1d>] dump_stack+0x4f/0x72 > > Aug 5 15:39:14 localhost kernel: [ 249.911595] [<ffffffff810591b6>] __warn+0xc6/0xe0 > > Aug 5 15:39:14 localhost kernel: [ 249.911598] [<ffffffff8105922a>] warn_slowpath_fmt+0x5a/0x80 > > Aug 5 15:39:14 localhost kernel: [ 249.911601] [<ffffffff81206abd>] sysfs_warn_dup+0x5d/0x70 > > Aug 5 15:39:14 localhost kernel: [ 249.911604] [<ffffffff81206b92>] sysfs_create_dir_ns+0x72/0x80 > > Aug 5 15:39:14 localhost kernel: [ 249.911607] [<ffffffff812ceca9>] kobject_add_internal+0x99/0x2c0 > > Aug 5 15:39:14 localhost kernel: [ 249.911614] [<ffffffff8114803d>] ? kfree_const+0x1d/0x20 > > Aug 5 15:39:14 localhost kernel: [ 249.911617] [<ffffffff812cef45>] kobject_add+0x75/0xd0 > > Aug 5 15:39:14 localhost kernel: [ 249.911621] [<ffffffff8117def9>] ? kmem_cache_alloc_trace+0x1c9/0x1e0 > > Aug 5 15:39:14 localhost kernel: [ 249.911628] [<ffffffff81382c18>] get_device_parent.isra.19+0x108/0x1c0 > > Aug 5 15:39:14 localhost kernel: [ 249.911631] [<ffffffff813838c7>] device_add+0xd7/0x5c0 > > Aug 5 15:39:14 localhost kernel: [ 249.911634] [<ffffffff81383fab>] device_create_groups_vargs+0xdb/0xf0 > > Aug 5 15:39:14 localhost kernel: [ 249.911689] [<ffffffffc095412a>] ? bch_fs_init+0xa2/0xa2 [bcache] > > Aug 5 15:39:14 localhost kernel: [ 249.911693] [<ffffffff8138402c>] device_create+0x4c/0x70 > > Aug 5 15:39:14 localhost kernel: [ 249.911698] [<ffffffff813880bc>] ? __class_create+0x4c/0x80 > > Aug 5 15:39:14 localhost kernel: [ 249.911716] [<ffffffffc095412a>] ? bch_fs_init+0xa2/0xa2 [bcache] > > Aug 5 15:39:14 localhost kernel: [ 249.911721] [<ffffffff812cf6fe>] ? kobject_uevent_env+0xfe/0x500 > > Aug 5 15:39:14 localhost kernel: [ 249.911739] [<ffffffffc09541d6>] bcache_init+0xac/0x14c [bcache] > > Aug 5 15:39:14 localhost kernel: [ 249.911744] [<ffffffff8100042b>] do_one_initcall+0x4b/0x170 > > Aug 5 15:39:14 localhost kernel: [ 249.911748] [<ffffffff81169d4c>] ? __vunmap+0x7c/0xc0 > > Aug 5 15:39:14 localhost kernel: [ 249.911750] [<ffffffff81169ded>] ? vfree+0x2d/0x80 > > Aug 5 15:39:14 localhost kernel: [ 249.911755] [<ffffffff811290bb>] do_init_module+0x5a/0x1ca > > Aug 5 15:39:14 localhost kernel: [ 249.911761] [<ffffffff810db8fa>] load_module+0x20ba/0x2510 > > Aug 5 15:39:14 localhost kernel: [ 249.911764] [<ffffffff810d84e0>] ? __symbol_put+0x90/0x90 > > Aug 5 15:39:14 localhost kernel: [ 249.911768] [<ffffffff810dbe88>] SYSC_init_module+0x138/0x150 > > Aug 5 15:39:14 localhost kernel: [ 249.911772] [<ffffffff810dbf99>] SyS_init_module+0x9/0x10 > > Aug 5 15:39:14 localhost kernel: [ 249.911776] [<ffffffff8157431f>] entry_SYSCALL_64_fastpath+0x17/0x93 > > Aug 5 15:39:14 localhost kernel: [ 249.911780] ---[ end trace 1443a8f8ae686881 ]--- > > Aug 5 15:39:14 localhost kernel: [ 249.911783] ------------[ cut here ]------------ > > Aug 5 15:39:14 localhost kernel: [ 249.911786] WARNING: CPU: 3 PID: 17892 at lib/kobject.c:240 kobject_add_internal+0x252/0x2c0 > > Aug 5 15:39:14 localhost kernel: [ 249.911789] kobject_add_internal failed for bcache with -EEXIST, don't try to register things with the same name in the same directory. > > Aug 5 15:39:14 localhost kernel: [ 249.911791] Modules linked in: bcache(+) libcrc32c tun spadfs(O) mousedev vboxnetadp(O) vboxnetflt(O) nouveau vboxdrv(O) wmi video backlight i2c_algo_bit ttm fbcon bitblit softcursor font coretemp drm_kms_helper hwmon cfbfillrect syscopyarea kvm_intel snd_ens1371 snd_ac97_codec cfbimgblt kvm sysfillrect ac97_bus snd_rawmidi sysimgblt snd_pcm fb_sys_fops cfbcopyarea snd_timer snd drm 8250 8250_base e1000e irqbypass agpgart ptp fb soundcore fbdev pps_core serial_core evdev psmouse lpc_ich acpi_cpufreq button i2c_i801 i82975x_edac processor edac_core mfd_core zfs(PO) zunicode(PO) zcommon(PO) znvpair(PO) spl(O) zlib_deflate zavl(PO) sr_mod cdrom sata_sil [last unloaded: bcache] > > Aug 5 15:39:14 localhost kernel: [ 249.911851] CPU: 3 PID: 17892 Comm: modprobe Tainted: P W O 4.7.0-bcache+ #4 > > Aug 5 15:39:14 localhost kernel: [ 249.911853] Hardware name: /D975XBX, BIOS BX97510J.86A.1487.2007.0902.1724 09/02/2007 > > Aug 5 15:39:14 localhost kernel: [ 249.911855] 0000000000000286 00000000e7ecea9b ffff88008e9379e8 ffffffff812cbf1d > > Aug 5 15:39:14 localhost kernel: [ 249.911860] ffff88008e937a38 0000000000000000 ffff88008e937a28 ffffffff810591b6 > > Aug 5 15:39:14 localhost kernel: [ 249.911863] 000000f08e937a50 ffff8800ca01d180 00000000ffffffef ffff88014a305a00 > > Aug 5 15:39:14 localhost kernel: [ 249.911867] Call Trace: > > Aug 5 15:39:14 localhost kernel: [ 249.911869] [<ffffffff812cbf1d>] dump_stack+0x4f/0x72 > > Aug 5 15:39:14 localhost kernel: [ 249.911872] [<ffffffff810591b6>] __warn+0xc6/0xe0 > > Aug 5 15:39:14 localhost kernel: [ 249.911875] [<ffffffff8105922a>] warn_slowpath_fmt+0x5a/0x80 > > Aug 5 15:39:14 localhost kernel: [ 249.911877] [<ffffffff81206ac5>] ? sysfs_warn_dup+0x65/0x70 > > Aug 5 15:39:14 localhost kernel: [ 249.911880] [<ffffffff812cee62>] kobject_add_internal+0x252/0x2c0 > > Aug 5 15:39:14 localhost kernel: [ 249.911883] [<ffffffff8114803d>] ? kfree_const+0x1d/0x20 > > Aug 5 15:39:14 localhost kernel: [ 249.911886] [<ffffffff812cef45>] kobject_add+0x75/0xd0 > > Aug 5 15:39:14 localhost kernel: [ 249.911889] [<ffffffff8117def9>] ? kmem_cache_alloc_trace+0x1c9/0x1e0 > > Aug 5 15:39:14 localhost kernel: [ 249.911894] [<ffffffff81382c18>] get_device_parent.isra.19+0x108/0x1c0 > > Aug 5 15:39:14 localhost kernel: [ 249.911897] [<ffffffff813838c7>] device_add+0xd7/0x5c0 > > Aug 5 15:39:14 localhost kernel: [ 249.911900] [<ffffffff81383fab>] device_create_groups_vargs+0xdb/0xf0 > > Aug 5 15:39:14 localhost kernel: [ 249.911919] [<ffffffffc095412a>] ? bch_fs_init+0xa2/0xa2 [bcache] > > Aug 5 15:39:14 localhost kernel: [ 249.911922] [<ffffffff8138402c>] device_create+0x4c/0x70 > > Aug 5 15:39:14 localhost kernel: [ 249.911925] [<ffffffff813880bc>] ? __class_create+0x4c/0x80 > > Aug 5 15:39:14 localhost kernel: [ 249.911944] [<ffffffffc095412a>] ? bch_fs_init+0xa2/0xa2 [bcache] > > Aug 5 15:39:14 localhost kernel: [ 249.911948] [<ffffffff812cf6fe>] ? kobject_uevent_env+0xfe/0x500 > > Aug 5 15:39:14 localhost kernel: [ 249.911966] [<ffffffffc09541d6>] bcache_init+0xac/0x14c [bcache] > > Aug 5 15:39:14 localhost kernel: [ 249.911969] [<ffffffff8100042b>] do_one_initcall+0x4b/0x170 > > Aug 5 15:39:14 localhost kernel: [ 249.911972] [<ffffffff81169d4c>] ? __vunmap+0x7c/0xc0 > > Aug 5 15:39:14 localhost kernel: [ 249.911974] [<ffffffff81169ded>] ? vfree+0x2d/0x80 > > Aug 5 15:39:14 localhost kernel: [ 249.911977] [<ffffffff811290bb>] do_init_module+0x5a/0x1ca > > Aug 5 15:39:14 localhost kernel: [ 249.911980] [<ffffffff810db8fa>] load_module+0x20ba/0x2510 > > Aug 5 15:39:14 localhost kernel: [ 249.911982] [<ffffffff810d84e0>] ? __symbol_put+0x90/0x90 > > Aug 5 15:39:14 localhost kernel: [ 249.911987] [<ffffffff810dbe88>] SYSC_init_module+0x138/0x150 > > Aug 5 15:39:14 localhost kernel: [ 249.911990] [<ffffffff810dbf99>] SyS_init_module+0x9/0x10 > > Aug 5 15:39:14 localhost kernel: [ 249.911993] [<ffffffff8157431f>] entry_SYSCALL_64_fastpath+0x17/0x93 > > Aug 5 15:39:14 localhost kernel: [ 249.911995] ---[ end trace 1443a8f8ae686882 ]--- > > Aug 5 15:39:14 localhost kernel: [ 249.912387] ------------[ cut here ]------------ > > Aug 5 15:39:14 localhost kernel: [ 249.912393] WARNING: CPU: 3 PID: 17892 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x5d/0x70 > > Aug 5 15:39:14 localhost kernel: [ 249.912394] sysfs: cannot create duplicate filename '/dev/char/249:255' > > Aug 5 15:39:14 localhost kernel: [ 249.912396] Modules linked in: bcache(+) libcrc32c tun spadfs(O) mousedev vboxnetadp(O) vboxnetflt(O) nouveau vboxdrv(O) wmi video backlight i2c_algo_bit ttm fbcon bitblit softcursor font coretemp drm_kms_helper hwmon cfbfillrect syscopyarea kvm_intel snd_ens1371 snd_ac97_codec cfbimgblt kvm sysfillrect ac97_bus snd_rawmidi sysimgblt snd_pcm fb_sys_fops cfbcopyarea snd_timer snd drm 8250 8250_base e1000e irqbypass agpgart ptp fb soundcore fbdev pps_core serial_core evdev psmouse lpc_ich acpi_cpufreq button i2c_i801 i82975x_edac processor edac_core mfd_core zfs(PO) zunicode(PO) zcommon(PO) znvpair(PO) spl(O) zlib_deflate zavl(PO) sr_mod cdrom sata_sil [last unloaded: bcache] > > Aug 5 15:39:14 localhost kernel: [ 249.912539] CPU: 3 PID: 17892 Comm: modprobe Tainted: P W O 4.7.0-bcache+ #4 > > Aug 5 15:39:14 localhost kernel: [ 249.912542] Hardware name: /D975XBX, BIOS BX97510J.86A.1487.2007.0902.1724 09/02/2007 > > Aug 5 15:39:14 localhost kernel: [ 249.912545] 0000000000000286 00000000e7ecea9b ffff88008e937a58 ffffffff812cbf1d > > Aug 5 15:39:14 localhost kernel: [ 249.912551] ffff88008e937aa8 0000000000000000 ffff88008e937a98 ffffffff810591b6 > > Aug 5 15:39:14 localhost kernel: [ 249.912555] 0000001f4a2f3078 ffff8800b95d1000 ffff88008e937b89 ffff88014a2f3168 > > Aug 5 15:39:14 localhost kernel: [ 249.912560] Call Trace: > > Aug 5 15:39:14 localhost kernel: [ 249.912565] [<ffffffff812cbf1d>] dump_stack+0x4f/0x72 > > Aug 5 15:39:14 localhost kernel: [ 249.912569] [<ffffffff810591b6>] __warn+0xc6/0xe0 > > Aug 5 15:39:14 localhost kernel: [ 249.912572] [<ffffffff8105922a>] warn_slowpath_fmt+0x5a/0x80 > > Aug 5 15:39:14 localhost kernel: [ 249.912575] [<ffffffff81206abd>] sysfs_warn_dup+0x5d/0x70 > > Aug 5 15:39:14 localhost kernel: [ 249.912578] [<ffffffff81206e36>] sysfs_do_create_link_sd.isra.2+0xb6/0xc0 > > Aug 5 15:39:14 localhost kernel: [ 249.912581] [<ffffffff81206e60>] sysfs_create_link+0x20/0x40 > > Aug 5 15:39:14 localhost kernel: [ 249.912585] [<ffffffff81383d0d>] device_add+0x51d/0x5c0 > > Aug 5 15:39:14 localhost kernel: [ 249.912587] [<ffffffff81383fab>] device_create_groups_vargs+0xdb/0xf0 > > Aug 5 15:39:14 localhost kernel: [ 249.912616] [<ffffffffc095412a>] ? bch_fs_init+0xa2/0xa2 [bcache] > > Aug 5 15:39:14 localhost kernel: [ 249.912619] [<ffffffff8138402c>] device_create+0x4c/0x70 > > Aug 5 15:39:14 localhost kernel: [ 249.912623] [<ffffffff813880bc>] ? __class_create+0x4c/0x80 > > Aug 5 15:39:14 localhost kernel: [ 249.912640] [<ffffffffc095412a>] ? bch_fs_init+0xa2/0xa2 [bcache] > > Aug 5 15:39:14 localhost kernel: [ 249.912644] [<ffffffff812cf6fe>] ? kobject_uevent_env+0xfe/0x500 > > Aug 5 15:39:14 localhost kernel: [ 249.912662] [<ffffffffc09541d6>] bcache_init+0xac/0x14c [bcache] > > Aug 5 15:39:14 localhost kernel: [ 249.912666] [<ffffffff8100042b>] do_one_initcall+0x4b/0x170 > > Aug 5 15:39:14 localhost kernel: [ 249.912668] [<ffffffff81169d4c>] ? __vunmap+0x7c/0xc0 > > Aug 5 15:39:14 localhost kernel: [ 249.912671] [<ffffffff81169ded>] ? vfree+0x2d/0x80 > > Aug 5 15:39:14 localhost kernel: [ 249.912675] [<ffffffff811290bb>] do_init_module+0x5a/0x1ca > > Aug 5 15:39:14 localhost kernel: [ 249.912678] [<ffffffff810db8fa>] load_module+0x20ba/0x2510 > > Aug 5 15:39:14 localhost kernel: [ 249.912681] [<ffffffff810d84e0>] ? __symbol_put+0x90/0x90 > > Aug 5 15:39:14 localhost kernel: [ 249.912686] [<ffffffff810dbe88>] SYSC_init_module+0x138/0x150 > > Aug 5 15:39:14 localhost kernel: [ 249.912690] [<ffffffff810dbf99>] SyS_init_module+0x9/0x10 > > Aug 5 15:39:14 localhost kernel: [ 249.912693] [<ffffffff8157431f>] entry_SYSCALL_64_fastpath+0x17/0x93 > > Aug 5 15:39:14 localhost kernel: [ 249.912696] ---[ end trace 1443a8f8ae686883 ]--- > > Aug 5 15:39:14 localhost kernel: [ 249.912857] ------------[ cut here ]------------ > > Aug 5 15:39:14 localhost kernel: [ 249.912863] WARNING: CPU: 3 PID: 17892 at block/genhd.c:354 unregister_blkdev+0x72/0xc0 > > Aug 5 15:39:14 localhost kernel: [ 249.912865] Modules linked in: bcache(+) libcrc32c tun spadfs(O) mousedev vboxnetadp(O) vboxnetflt(O) nouveau vboxdrv(O) wmi video backlight i2c_algo_bit ttm fbcon bitblit softcursor font coretemp drm_kms_helper hwmon cfbfillrect syscopyarea kvm_intel snd_ens1371 snd_ac97_codec cfbimgblt kvm sysfillrect ac97_bus snd_rawmidi sysimgblt snd_pcm fb_sys_fops cfbcopyarea snd_timer snd drm 8250 8250_base e1000e irqbypass agpgart ptp fb soundcore fbdev pps_core serial_core evdev psmouse lpc_ich acpi_cpufreq button i2c_i801 i82975x_edac processor edac_core mfd_core zfs(PO) zunicode(PO) zcommon(PO) znvpair(PO) spl(O) zlib_deflate zavl(PO) sr_mod cdrom sata_sil [last unloaded: bcache] > > Aug 5 15:39:14 localhost kernel: [ 249.912919] CPU: 3 PID: 17892 Comm: modprobe Tainted: P W O 4.7.0-bcache+ #4 > > Aug 5 15:39:14 localhost kernel: [ 249.912921] Hardware name: /D975XBX, BIOS BX97510J.86A.1487.2007.0902.1724 09/02/2007 > > Aug 5 15:39:14 localhost kernel: [ 249.912923] 0000000000000286 00000000e7ecea9b ffff88008e937be0 ffffffff812cbf1d > > Aug 5 15:39:14 localhost kernel: [ 249.912927] 0000000000000000 0000000000000000 ffff88008e937c20 ffffffff810591b6 > > Aug 5 15:39:14 localhost kernel: [ 249.912932] 0000016200000001 0000000000000000 0000000000000000 ffffffffc09255d4 > > Aug 5 15:39:14 localhost kernel: [ 249.912935] Call Trace: > > Aug 5 15:39:14 localhost kernel: [ 249.912938] [<ffffffff812cbf1d>] dump_stack+0x4f/0x72 > > Aug 5 15:39:14 localhost kernel: [ 249.912941] [<ffffffff810591b6>] __warn+0xc6/0xe0 > > Aug 5 15:39:14 localhost kernel: [ 249.912944] [<ffffffff810592d8>] warn_slowpath_null+0x18/0x20 > > Aug 5 15:39:14 localhost kernel: [ 249.912947] [<ffffffff812b25a2>] unregister_blkdev+0x72/0xc0 > > Aug 5 15:39:14 localhost kernel: [ 249.912966] [<ffffffffc095412a>] ? bch_fs_init+0xa2/0xa2 [bcache] > > Aug 5 15:39:14 localhost kernel: [ 249.912986] [<ffffffffc08d7366>] bch_blockdev_exit+0x26/0x30 [bcache] > > Aug 5 15:39:14 localhost kernel: [ 249.913007] [<ffffffffc0913be3>] bcache_exit+0x13/0xa0 [bcache] > > Aug 5 15:39:14 localhost kernel: [ 249.913026] [<ffffffffc0954184>] bcache_init+0x5a/0x14c [bcache] > > Aug 5 15:39:14 localhost kernel: [ 249.913029] [<ffffffff8100042b>] do_one_initcall+0x4b/0x170 > > Aug 5 15:39:14 localhost kernel: [ 249.913032] [<ffffffff81169d4c>] ? __vunmap+0x7c/0xc0 > > Aug 5 15:39:14 localhost kernel: [ 249.913035] [<ffffffff81169ded>] ? vfree+0x2d/0x80 > > Aug 5 15:39:14 localhost kernel: [ 249.913038] [<ffffffff811290bb>] do_init_module+0x5a/0x1ca > > Aug 5 15:39:14 localhost kernel: [ 249.913041] [<ffffffff810db8fa>] load_module+0x20ba/0x2510 > > Aug 5 15:39:14 localhost kernel: [ 249.913044] [<ffffffff810d84e0>] ? __symbol_put+0x90/0x90 > > Aug 5 15:39:14 localhost kernel: [ 249.913048] [<ffffffff810dbe88>] SYSC_init_module+0x138/0x150 > > Aug 5 15:39:14 localhost kernel: [ 249.913051] [<ffffffff810dbf99>] SyS_init_module+0x9/0x10 > > Aug 5 15:39:14 localhost kernel: [ 249.913054] [<ffffffff8157431f>] entry_SYSCALL_64_fastpath+0x17/0x93 > > Aug 5 15:39:14 localhost kernel: [ 249.913077] ---[ end trace 1443a8f8ae686884 ]--- > > > > Have a nice day/afternoon. > Marcin > -- > To unsubscribe from this list: send the line "unsubscribe linux-bcache" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html >
