Finally I successfully remounted my partition. Here is how I've done to recover, in case it can help someone else : I had to clone btrfs-progs-unstable tree. Then checkout branch "tmp" (because I use compression, default btrfs-progs are "too old" Then I compiled btrfs-zero-log with "make btrfs-zero-log" And finally ran "./btrfs-zero-log /dev/sda2" Now I'm copying everything to a new partition, because I don't know if can safely use the damaged one. But wouldn't it be possible to avoid the "Null pointer" kernel crash by checking what we do inside replay_one_buffer, and then automatically clear log, or provide a "clear_log" mount option? Any idea about what could have caused my problem? Thanks. 2011/5/25 matthieu Barthélemy <bonsouere@xxxxxxxxx>: > Hi all, > > I have a Btrfs partition that cannot be mounted anymore, it makes > kernel to crash. > The partition was created a few months ago, with kernel 2.6.33 (with > no special options) if I remember well. Since then, with new kernel > releases, I enabled a few options : first space_cache, then compress, > and finally with 2.6.38 compress=lzo > So the filesystem has now space_cache, data compressed with zlib AND lzo. > > With kernel 2.6.39-rc5 I had, a few weeks ago, a first crash where it > complained about no free space. Then I rebooted on kernel 2.6.38, > mounted the filesystem with the clear_cache option, and everything > went fine, even returning back on kernel 2.6.39-rc5. > > But last week, while I was working (nothing special such as intensive > read or writes), the system crashed because of Btrfs. > Since then, I cannot mount my FS anymore. > Here are the dmesg logs I gathered, testing with 2.6.39-rc5, and just > to see if it made any difference, with the integration-test tree. > > Any idea about what happened? How can I help you to diagnose that? Any > chance I could recover my data? > > Thanks. > > with 2.6.39-rc5 : > # mount -o clear_cache,compress=lzo /dev/sda2 /mnt/ > > [ 676.767161] Btrfs loaded > [ 676.774399] device fsid f24027efc24d32f7-2191b1da9df7d184 devid 1 > transid 164511 /dev/sda2 > [ 676.775233] btrfs: force clearing of disk cache > [ 676.775255] btrfs: use lzo compression > [ 676.834811] btrfs: disk space caching is enabled > [ 677.601773] BUG: unable to handle kernel NULL pointer dereference at (null) > [ 677.601800] IP: [<c022bbfb>] kmap_atomic_prot+0x1b/0xf0 > [ 677.601822] *pde = 00000000 > [ 677.601834] Oops: 0000 [#1] SMP > [ 677.601846] last sysfs file: /sys/devices/virtual/bdi/btrfs-1/uevent > [ 677.601861] Modules linked in: btrfs zlib_deflate af_packet > snd_pcm_oss snd_mixer_oss snd_seq snd_seq_device bnep edd > cpufreq_conservative microcode cpufreq_userspace cpufreq_powersave > acpi_cpufreq mperf dm_mod snd_hda_codec_realtek snd_hda_intel btusb > snd_hda_codec bluetooth usb_storage snd_hwdep uas iTCO_wdt > iTCO_vendor_support snd_pcm rfkill r8187se(C) uvcvideo videodev > snd_timer media joydev wmi battery ac sg eeprom_93cx6 snd pcspkr > soundcore r8169 snd_page_alloc ext4 jbd2 crc16 usbhid hid sd_mod > ata_generic i915 ata_piix drm_kms_helper libata drm uhci_hcd scsi_mod > ehci_hcd i2c_algo_bit rtc_cmos rtc_core rtc_lib usbcore intel_agp > button video intel_gtt fan thermal processor thermal_sys hwmon > [ 677.602034] > [ 677.602046] Pid: 2401, comm: mount Tainted: G C > 2.6.39-rc5-0.3-default #6 LG Electronics X110-L.A741B/X110 > [ 677.602068] EIP: 0060:[<c022bbfb>] EFLAGS: 00210202 CPU: 1 > [ 677.602082] EIP is at kmap_atomic_prot+0x1b/0xf0 > [ 677.602094] EAX: 00000000 EBX: 000004ca ECX: d9fee000 EDX: 00000163 > [ 677.602107] ESI: 00000000 EDI: 000004ca EBP: d9fefb88 ESP: d9fefb78 > [ 677.602121] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 > [ 677.602134] Process mount (pid: 2401, ti=d9fee000 task=e61bf030 > task.ti=d9fee000) > [ 677.602147] Stack: > [ 677.602156] f64037c0 000004ca 00000000 000004ca d9fefb90 c022bcde > d9fefbbc f853bab8 > [ 677.602179] 00000000 c71c40f0 c68560a8 00000007 b7c09000 0000000e > 00006572 c6850000 > [ 677.602202] 00000f58 d9fefc24 f854b727 00006572 00000000 00000000 > 00000000 00094689 > [ 677.602225] Call Trace: > [ 677.602239] [<c022bcde>] __kmap_atomic+0xe/0x10 > [ 677.602281] [<f853bab8>] read_extent_buffer+0x88/0x140 [btrfs] > [ 677.602322] [<f854b727>] add_inode_ref+0x1e7/0x330 [btrfs] > [ 677.602363] [<f854ccde>] replay_one_buffer+0x21e/0x2e0 [btrfs] > [ 677.602404] [<f854a431>] walk_down_log_tree+0x1d1/0x360 [btrfs] > [ 677.602445] [<f854a636>] walk_log_tree+0x76/0x1e0 [btrfs] > [ 677.602463] [<c03e7a2a>] ? radix_tree_lookup+0xa/0x10 > [ 677.602503] [<f854e8fe>] btrfs_recover_log_trees+0x1de/0x2b0 [btrfs] > [ 677.602544] [<f854cac0>] ? replay_one_extent+0x6a0/0x6a0 [btrfs] > [ 677.602596] [<f8513a8c>] open_ctree+0x10bc/0x1410 [btrfs] > [ 677.602615] [<c03e9ca9>] ? strlcpy+0x39/0x60 > [ 677.602646] [<f84f45e1>] btrfs_mount+0x461/0x590 [btrfs] > [ 677.602664] [<c02e3400>] ? pcpu_alloc+0x310/0x850 > [ 677.602681] [<c03098d5>] mount_fs+0x35/0x180 > [ 677.602698] [<c031e9d6>] vfs_kern_mount+0x46/0xa0 > [ 677.602712] [<c031f7c9>] do_kern_mount+0x39/0xd0 > [ 677.602726] [<c0320f34>] do_mount+0x594/0x6c0 > [ 677.602741] [<c02d13d6>] ? __get_free_pages+0x26/0x30 > [ 677.602755] [<c0320879>] ? copy_mount_options+0x39/0x120 > [ 677.602770] [<c0321386>] sys_mount+0x66/0xa0 > [ 677.602786] [<c05d021c>] sysenter_do_call+0x12/0x28 > [ 677.602798] Code: 8b 15 cc 42 82 c0 55 89 e5 e8 52 f9 ff ff 5d c3 > 55 89 e5 83 ec 10 89 e1 81 e1 00 e0 ff ff 89 5d f4 89 75 f8 89 7d fc > 83 41 14 01 <8b> 08 c1 e9 1e 69 c9 80 03 00 00 8d b1 80 db 78 c0 2b b1 > cc de > [ 677.602902] EIP: [<c022bbfb>] kmap_atomic_prot+0x1b/0xf0 SS:ESP 0068:d9fefb78 > [ 677.602920] CR2: 0000000000000000 > [ 677.604805] [drm] Changing LVDS panel from (+hsync, +vsync) to > (-hsync, -vsync) > [ 677.854425] ---[ end trace b216833b014671c4 ]--- > [ 677.854452] note: mount[2401] exited with preempt_count 1 > [ 677.854731] BUG: scheduling while atomic: mount/2401/0x10000001 > [ 677.854753] Modules linked in: btrfs zlib_deflate af_packet > snd_pcm_oss snd_mixer_oss snd_seq snd_seq_device bnep edd > cpufreq_conservative microcode cpufreq_userspace cpufreq_powersave > acpi_cpufreq mperf dm_mod snd_hda_codec_realtek snd_hda_intel btusb > snd_hda_codec bluetooth usb_storage snd_hwdep uas iTCO_wdt > iTCO_vendor_support snd_pcm rfkill r8187se(C) uvcvideo videodev > snd_timer media joydev wmi battery ac sg eeprom_93cx6 snd pcspkr > soundcore r8169 snd_page_alloc ext4 jbd2 crc16 usbhid hid sd_mod > ata_generic i915 ata_piix drm_kms_helper libata drm uhci_hcd scsi_mod > ehci_hcd i2c_algo_bit rtc_cmos rtc_core rtc_lib usbcore intel_agp > button video intel_gtt fan thermal processor thermal_sys hwmon > [ 677.854935] Pid: 2401, comm: mount Tainted: G D C > 2.6.39-rc5-0.3-default #6 > [ 677.854942] Call Trace: > [ 677.854959] [<c023420d>] __schedule_bug+0x5d/0x70 > [ 677.854971] [<c05c7984>] schedule+0xa24/0xa30 > [ 677.854982] [<c02d4310>] ? release_pages+0x1b0/0x1e0 > [ 677.854993] [<c030838f>] ? fput+0x12f/0x1e0 > [ 677.855004] [<c02ea9ca>] ? remove_vma+0x3a/0x50 > [ 677.855015] [<c023f846>] __cond_resched+0x16/0x30 > [ 677.855024] [<c05c7ba3>] _cond_resched+0x23/0x30 > [ 677.855034] [<c0248cdc>] put_files_struct+0x6c/0xb0 > [ 677.855043] [<c0248dac>] exit_files+0x3c/0x50 > [ 677.855051] [<c02491de>] do_exit+0x15e/0x780 > [ 677.855060] [<c0247227>] ? kmsg_dump+0x37/0xd0 > [ 677.855070] [<c05c6c6d>] ? printk+0x28/0x2b > [ 677.855080] [<c05cad9d>] oops_end+0x8d/0xd0 > [ 677.855090] [<c022700e>] no_context+0xbe/0x150 > [ 677.855100] [<c0227227>] __bad_area_nosemaphore+0x37/0x170 > [ 677.855111] [<c0227372>] bad_area_nosemaphore+0x12/0x20 > [ 677.855121] [<c05ccc94>] do_page_fault+0x2c4/0x420 > [ 677.855131] [<c02d0dbe>] ? __alloc_pages_nodemask+0xee/0x6e0 > [ 677.855142] [<c022bc27>] ? kmap_atomic_prot+0x47/0xf0 > [ 677.855152] [<c05cc9d0>] ? spurious_fault+0xd0/0xd0 > [ 677.855161] [<c05ca34a>] error_code+0x5a/0x60 > [ 677.855171] [<c05cc9d0>] ? spurious_fault+0xd0/0xd0 > [ 677.855180] [<c022bbfb>] ? kmap_atomic_prot+0x1b/0xf0 > [ 677.855189] [<c022bcde>] __kmap_atomic+0xe/0x10 > [ 677.855235] [<f853bab8>] read_extent_buffer+0x88/0x140 [btrfs] > [ 677.855273] [<f854b727>] add_inode_ref+0x1e7/0x330 [btrfs] > [ 677.855318] [<f854ccde>] replay_one_buffer+0x21e/0x2e0 [btrfs] > [ 677.855358] [<f854a431>] walk_down_log_tree+0x1d1/0x360 [btrfs] > [ 677.855399] [<f854a636>] walk_log_tree+0x76/0x1e0 [btrfs] > [ 677.855410] [<c03e7a2a>] ? radix_tree_lookup+0xa/0x10 > [ 677.855446] [<f854e8fe>] btrfs_recover_log_trees+0x1de/0x2b0 [btrfs] > [ 677.855488] [<f854cac0>] ? replay_one_extent+0x6a0/0x6a0 [btrfs] > [ 677.855539] [<f8513a8c>] open_ctree+0x10bc/0x1410 [btrfs] > [ 677.855552] [<c03e9ca9>] ? strlcpy+0x39/0x60 > [ 677.855583] [<f84f45e1>] btrfs_mount+0x461/0x590 [btrfs] > [ 677.855594] [<c02e3400>] ? pcpu_alloc+0x310/0x850 > [ 677.855604] [<c03098d5>] mount_fs+0x35/0x180 > [ 677.855616] [<c031e9d6>] vfs_kern_mount+0x46/0xa0 > [ 677.855625] [<c031f7c9>] do_kern_mount+0x39/0xd0 > [ 677.855634] [<c0320f34>] do_mount+0x594/0x6c0 > [ 677.855643] [<c02d13d6>] ? __get_free_pages+0x26/0x30 > [ 677.855652] [<c0320879>] ? copy_mount_options+0x39/0x120 > [ 677.855661] [<c0321386>] sys_mount+0x66/0xa0 > [ 677.855672] [<c05d021c>] sysenter_do_call+0x12/0x28 > > > > > with 2.6.39-rc5, without clear_cache option > # mount -o compress=lzo /dev/sda2 /mnt/ > [ 138.393711] Btrfs loaded > [ 138.415758] device fsid f24027efc24d32f7-2191b1da9df7d184 devid 1 > transid 164511 /dev/sda2 > [ 138.416404] btrfs: use lzo compression > [ 138.476160] btrfs: disk space caching is enabled > [ 139.154606] block group 29360128 has an wrong amount of free space > [ 139.287457] BUG: unable to handle kernel NULL pointer dereference at (null) > [ 139.287484] IP: [<c022bbfb>] kmap_atomic_prot+0x1b/0xf0 > [ 139.287506] *pde = 00000000 > [ 139.287518] Oops: 0000 [#1] SMP > [ 139.287530] last sysfs file: /sys/devices/virtual/bdi/btrfs-1/uevent > [ 139.287544] Modules linked in: btrfs zlib_deflate af_packet > snd_pcm_oss snd_mixer_oss snd_seq snd_seq_device bnep edd > cpufreq_conservative microcode cpufreq_userspace cpufreq_powersave > acpi_cpufreq mperf dm_mod snd_hda_codec_realtek snd_hda_intel > snd_hda_codec snd_hwdep snd_pcm usb_storage uas snd_timer uvcvideo > videodev iTCO_wdt iTCO_vendor_support snd soundcore snd_page_alloc > media btusb pcspkr bluetooth r8187se(C) rfkill joydev battery r8169 > eeprom_93cx6 wmi sg ac ext4 jbd2 crc16 usbhid hid sd_mod ata_generic > i915 drm_kms_helper ata_piix drm uhci_hcd rtc_cmos rtc_core libata > ehci_hcd i2c_algo_bit rtc_lib usbcore scsi_mod button intel_agp > intel_gtt video fan thermal processor thermal_sys hwmon > [ 139.287717] > [ 139.287729] Pid: 2193, comm: mount Tainted: G C > 2.6.39-rc5-0.3-default #6 LG Electronics X110-L.A741B/X110 > [ 139.287751] EIP: 0060:[<c022bbfb>] EFLAGS: 00210202 CPU: 1 > [ 139.287764] EIP is at kmap_atomic_prot+0x1b/0xf0 > [ 139.287777] EAX: 00000000 EBX: 000004ca ECX: cccc2000 EDX: 00000163 > [ 139.287790] ESI: 00000000 EDI: 000004ca EBP: cccc3b88 ESP: cccc3b78 > [ 139.287804] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 > [ 139.287817] Process mount (pid: 2193, ti=cccc2000 task=ccc90d30 > task.ti=cccc2000) > [ 139.287830] Stack: > [ 139.287838] f64037c0 000004ca 00000000 000004ca cccc3b90 c022bcde > cccc3bbc f8935ab8 > [ 139.287861] 00000000 d0570180 c92ce0a8 00000007 b7c09000 0000000e > 00006572 c92c8000 > [ 139.287884] 00000f58 cccc3c24 f8945727 00006572 00000000 00000000 > 00000000 00094689 > [ 139.287907] Call Trace: > [ 139.287921] [<c022bcde>] __kmap_atomic+0xe/0x10 > [ 139.287963] [<f8935ab8>] read_extent_buffer+0x88/0x140 [btrfs] > [ 139.288005] [<f8945727>] add_inode_ref+0x1e7/0x330 [btrfs] > [ 139.288056] [<f8946cde>] replay_one_buffer+0x21e/0x2e0 [btrfs] > [ 139.288098] [<f8944431>] walk_down_log_tree+0x1d1/0x360 [btrfs] > [ 139.288139] [<f8944636>] walk_log_tree+0x76/0x1e0 [btrfs] > [ 139.288157] [<c03e7a2a>] ? radix_tree_lookup+0xa/0x10 > [ 139.288197] [<f89488fe>] btrfs_recover_log_trees+0x1de/0x2b0 [btrfs] > [ 139.288238] [<f8946ac0>] ? replay_one_extent+0x6a0/0x6a0 [btrfs] > [ 139.288290] [<f890da8c>] open_ctree+0x10bc/0x1410 [btrfs] > [ 139.288310] [<c03e9ca9>] ? strlcpy+0x39/0x60 > [ 139.288341] [<f88ee5e1>] btrfs_mount+0x461/0x590 [btrfs] > [ 139.288359] [<c02e3400>] ? pcpu_alloc+0x310/0x850 > [ 139.288375] [<c03098d5>] mount_fs+0x35/0x180 > [ 139.288392] [<c031e9d6>] vfs_kern_mount+0x46/0xa0 > [ 139.288407] [<c031f7c9>] do_kern_mount+0x39/0xd0 > [ 139.288421] [<c0320f34>] do_mount+0x594/0x6c0 > [ 139.288436] [<c02d13d6>] ? __get_free_pages+0x26/0x30 > [ 139.288450] [<c0320879>] ? copy_mount_options+0x39/0x120 > [ 139.288464] [<c0321386>] sys_mount+0x66/0xa0 > [ 139.288481] [<c05d021c>] sysenter_do_call+0x12/0x28 > [ 139.288493] Code: 8b 15 cc 42 82 c0 55 89 e5 e8 52 f9 ff ff 5d c3 > 55 89 e5 83 ec 10 89 e1 81 e1 00 e0 ff ff 89 5d f4 89 75 f8 89 7d fc > 83 41 14 01 <8b> 08 c1 e9 1e 69 c9 80 03 00 00 8d b1 80 db 78 c0 2b b1 > cc de > [ 139.288595] EIP: [<c022bbfb>] kmap_atomic_prot+0x1b/0xf0 SS:ESP 0068:cccc3b78 > [ 139.288614] CR2: 0000000000000000 > [ 139.310232] ---[ end trace 34b5224bc0e9db2d ]--- > [ 139.310259] note: mount[2193] exited with preempt_count 1 > [ 139.310531] BUG: scheduling while atomic: mount/2193/0x10000001 > [ 139.310553] Modules linked in: btrfs zlib_deflate af_packet > snd_pcm_oss snd_mixer_oss snd_seq snd_seq_device bnep edd > cpufreq_conservative microcode cpufreq_userspace cpufreq_powersave > acpi_cpufreq mperf dm_mod snd_hda_codec_realtek snd_hda_intel > snd_hda_codec snd_hwdep snd_pcm usb_storage uas snd_timer uvcvideo > videodev iTCO_wdt iTCO_vendor_support snd soundcore snd_page_alloc > media btusb pcspkr bluetooth r8187se(C) rfkill joydev battery r8169 > eeprom_93cx6 wmi sg ac ext4 jbd2 crc16 usbhid hid sd_mod ata_generic > i915 drm_kms_helper ata_piix drm uhci_hcd rtc_cmos rtc_core libata > ehci_hcd i2c_algo_bit rtc_lib usbcore scsi_mod button intel_agp > intel_gtt video fan thermal processor thermal_sys hwmon > [ 139.310856] Pid: 2193, comm: mount Tainted: G D C > 2.6.39-rc5-0.3-default #6 > [ 139.310881] Call Trace: > [ 139.310911] [<c023420d>] __schedule_bug+0x5d/0x70 > [ 139.310940] [<c05c7984>] schedule+0xa24/0xa30 > [ 139.310967] [<c02d4310>] ? release_pages+0x1b0/0x1e0 > [ 139.310995] [<c030838f>] ? fput+0x12f/0x1e0 > [ 139.311022] [<c02ea9ca>] ? remove_vma+0x3a/0x50 > [ 139.311048] [<c023f846>] __cond_resched+0x16/0x30 > [ 139.311075] [<c05c7ba3>] _cond_resched+0x23/0x30 > [ 139.311100] [<c0248cdc>] put_files_struct+0x6c/0xb0 > [ 139.311126] [<c0248dac>] exit_files+0x3c/0x50 > [ 139.311147] [<c02491de>] do_exit+0x15e/0x780 > [ 139.311168] [<c0247227>] ? kmsg_dump+0x37/0xd0 > [ 139.311189] [<c05c6c6d>] ? printk+0x28/0x2b > [ 139.311211] [<c05cad9d>] oops_end+0x8d/0xd0 > [ 139.311233] [<c022700e>] no_context+0xbe/0x150 > [ 139.311255] [<c0227227>] __bad_area_nosemaphore+0x37/0x170 > [ 139.311279] [<c0227372>] bad_area_nosemaphore+0x12/0x20 > [ 139.311301] [<c05ccc94>] do_page_fault+0x2c4/0x420 > [ 139.311323] [<c02d0dbe>] ? __alloc_pages_nodemask+0xee/0x6e0 > [ 139.311347] [<c022bc27>] ? kmap_atomic_prot+0x47/0xf0 > [ 139.311373] [<c05cc9d0>] ? spurious_fault+0xd0/0xd0 > [ 139.311398] [<c05ca34a>] error_code+0x5a/0x60 > [ 139.311423] [<c05cc9d0>] ? spurious_fault+0xd0/0xd0 > [ 139.311450] [<c022bbfb>] ? kmap_atomic_prot+0x1b/0xf0 > [ 139.311476] [<c022bcde>] __kmap_atomic+0xe/0x10 > [ 139.311537] [<f8935ab8>] read_extent_buffer+0x88/0x140 [btrfs] > [ 139.311598] [<f8945727>] add_inode_ref+0x1e7/0x330 [btrfs] > [ 139.311657] [<f8946cde>] replay_one_buffer+0x21e/0x2e0 [btrfs] > [ 139.311710] [<f8944431>] walk_down_log_tree+0x1d1/0x360 [btrfs] > [ 139.311761] [<f8944636>] walk_log_tree+0x76/0x1e0 [btrfs] > [ 139.311786] [<c03e7a2a>] ? radix_tree_lookup+0xa/0x10 > [ 139.311846] [<f89488fe>] btrfs_recover_log_trees+0x1de/0x2b0 [btrfs] > [ 139.311907] [<f8946ac0>] ? replay_one_extent+0x6a0/0x6a0 [btrfs] > [ 139.311980] [<f890da8c>] open_ctree+0x10bc/0x1410 [btrfs] > [ 139.312038] [<c03e9ca9>] ? strlcpy+0x39/0x60 > [ 139.312087] [<f88ee5e1>] btrfs_mount+0x461/0x590 [btrfs] > [ 139.312115] [<c02e3400>] ? pcpu_alloc+0x310/0x850 > [ 139.312142] [<c03098d5>] mount_fs+0x35/0x180 > [ 139.312171] [<c031e9d6>] vfs_kern_mount+0x46/0xa0 > [ 139.312198] [<c031f7c9>] do_kern_mount+0x39/0xd0 > [ 139.312223] [<c0320f34>] do_mount+0x594/0x6c0 > [ 139.312249] [<c02d13d6>] ? __get_free_pages+0x26/0x30 > [ 139.312275] [<c0320879>] ? copy_mount_options+0x39/0x120 > [ 139.312302] [<c0321386>] sys_mount+0x66/0xa0 > [ 139.312328] [<c05d021c>] sysenter_do_call+0x12/0x28 > > > > with integration-test tree (2011/05/24) > # mount -o clear_cache,compress=lzo /dev/sda2 /mnt/ > [ 295.895116] Btrfs loaded > [ 295.906626] device fsid f24027efc24d32f7-2191b1da9df7d184 devid 1 > transid 164511 /dev/sda2 > [ 295.907432] btrfs: force clearing of disk cache > [ 295.907455] btrfs: use lzo compression > [ 295.967015] btrfs: disk space caching is enabled > [ 296.767248] BUG: unable to handle kernel NULL pointer dereference at (null) > [ 296.767274] IP: [<c022bcab>] kmap_atomic_prot+0x1b/0xf0 > [ 296.767298] *pde = 00000000 > [ 296.767310] Oops: 0000 [#1] SMP > [ 296.767322] last sysfs file: > /sys/devices/LNXSYSTM:00/device:00/PNP0A08:00/device:11/PNP0C09:00/PNP0C0A:00/power_supply/BAT1/voltage_now > [ 296.767346] Modules linked in: btrfs zlib_deflate fuse af_packet > snd_pcm_oss snd_mixer_oss snd_seq bnep snd_seq_device edd > cpufreq_conservative microcode cpufreq_userspace cpufreq_powersave > acpi_cpufreq mperf dm_mod snd_hda_codec_realtek snd_hda_intel > snd_hda_codec snd_hwdep snd_pcm snd_timer snd uvcvideo r8187se(C) > btusb videodev soundcore usb_storage iTCO_wdt sg iTCO_vendor_support > uas eeprom_93cx6 bluetooth r8169 wmi media rfkill snd_page_alloc > joydev pcspkr battery ac ext4 jbd2 crc16 usbhid hid sd_mod ata_generic > i915 drm_kms_helper uhci_hcd ata_piix drm ehci_hcd libata scsi_mod > rtc_cmos intel_agp i2c_algo_bit usbcore intel_gtt rtc_core rtc_lib > video button fan thermal processor thermal_sys hwmon > [ 296.767523] > [ 296.767534] Pid: 2299, comm: mount Tainted: G C > 2.6.39-0.3-default+ #1 LG Electronics X110-L.A741B/X110 > [ 296.767556] EIP: 0060:[<c022bcab>] EFLAGS: 00210202 CPU: 1 > [ 296.767570] EIP is at kmap_atomic_prot+0x1b/0xf0 > [ 296.767582] EAX: 00000000 EBX: 000004ca ECX: d6c4e000 EDX: 00000163 > [ 296.767595] ESI: 00000000 EDI: 000004ca EBP: d6c4fb78 ESP: d6c4fb68 > [ 296.767609] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 > [ 296.767623] Process mount (pid: 2299, ti=d6c4e000 task=d6c4ce70 > task.ti=d6c4e000) > [ 296.767636] Stack: > [ 296.767644] f4c037c0 000004ca 00000000 000004ca d6c4fb80 c022bd8e > d6c4fbac f888a278 > [ 296.767667] 00000000 e1ac3888 f400e0a8 00000007 b7c09000 0000000e > 00006572 f4008000 > [ 296.767690] 00000f58 d6c4fc20 f8899e5f 00006572 00000000 00000000 > 00000000 00094689 > [ 296.767713] Call Trace: > [ 296.767727] [<c022bd8e>] __kmap_atomic+0xe/0x10 > [ 296.767770] [<f888a278>] read_extent_buffer+0x88/0x140 [btrfs] > [ 296.767812] [<f8899e5f>] add_inode_ref+0x22f/0x370 [btrfs] > [ 296.767854] [<f889b7fe>] replay_one_buffer+0x21e/0x2e0 [btrfs] > [ 296.767897] [<f8898e61>] walk_down_log_tree+0x1d1/0x360 [btrfs] > [ 296.767939] [<f8899066>] walk_log_tree+0x76/0x1e0 [btrfs] > [ 296.767957] [<c03e585a>] ? radix_tree_lookup+0xa/0x10 > [ 296.767998] [<f889d47c>] btrfs_recover_log_trees+0x1dc/0x2a0 [btrfs] > [ 296.768050] [<f889b5e0>] ? replay_one_extent+0x6a0/0x6a0 [btrfs] > [ 296.768104] [<f88624c5>] open_ctree+0x11c5/0x1510 [btrfs] > [ 296.768124] [<c03e7ad9>] ? strlcpy+0x39/0x60 > [ 296.768155] [<f8842651>] btrfs_mount+0x461/0x590 [btrfs] > [ 296.768174] [<c02e2300>] ? pcpu_alloc+0x2c0/0x850 > [ 296.768192] [<c0307f25>] mount_fs+0x35/0x180 > [ 296.768208] [<c031cfe6>] vfs_kern_mount+0x46/0xa0 > [ 296.768223] [<c031ddd9>] do_kern_mount+0x39/0xd0 > [ 296.768237] [<c031f544>] do_mount+0x594/0x6c0 > [ 296.768253] [<c02d02a6>] ? __get_free_pages+0x26/0x30 > [ 296.768268] [<c031ee89>] ? copy_mount_options+0x39/0x120 > [ 296.768282] [<c031f996>] sys_mount+0x66/0xa0 > [ 296.768298] [<c05b745c>] sysenter_do_call+0x12/0x28 > [ 296.768310] Code: 8b 15 cc f2 7f c0 55 89 e5 e8 52 f9 ff ff 5d c3 > 55 89 e5 83 ec 10 89 e1 81 e1 00 e0 ff ff 89 5d f4 89 75 f8 89 7d fc > 83 41 14 01 <8b> 08 c1 e9 1e 69 c9 80 03 00 00 8d b1 80 a8 76 c0 2b b1 > cc ab > [ 296.768413] EIP: [<c022bcab>] kmap_atomic_prot+0x1b/0xf0 SS:ESP 0068:d6c4fb68 > [ 296.768432] CR2: 0000000000000000 > [ 296.770367] [drm] Changing LVDS panel from (+hsync, +vsync) to > (-hsync, -vsync) > [ 296.949992] ---[ end trace 0963ef50bd4dfa03 ]--- > [ 296.950017] note: mount[2299] exited with preempt_count 1 > [ 296.950322] BUG: scheduling while atomic: mount/2299/0x10000001 > [ 296.950345] Modules linked in: btrfs zlib_deflate fuse af_packet > snd_pcm_oss snd_mixer_oss snd_seq bnep snd_seq_device edd > cpufreq_conservative microcode cpufreq_userspace cpufreq_powersave > acpi_cpufreq mperf dm_mod snd_hda_codec_realtek snd_hda_intel > snd_hda_codec snd_hwdep snd_pcm snd_timer snd uvcvideo r8187se(C) > btusb videodev soundcore usb_storage iTCO_wdt sg iTCO_vendor_support > uas eeprom_93cx6 bluetooth r8169 wmi media rfkill snd_page_alloc > joydev pcspkr battery ac ext4 jbd2 crc16 usbhid hid sd_mod ata_generic > i915 drm_kms_helper uhci_hcd ata_piix drm ehci_hcd libata scsi_mod > rtc_cmos intel_agp i2c_algo_bit usbcore intel_gtt rtc_core rtc_lib > video button fan thermal processor thermal_sys hwmon > [ 296.950537] Pid: 2299, comm: mount Tainted: G D C > 2.6.39-0.3-default+ #1 > [ 296.950543] Call Trace: > [ 296.950561] [<c023438d>] __schedule_bug+0x5d/0x70 > [ 296.950573] [<c05aea3d>] schedule+0x8cd/0xa60 > [ 296.950584] [<c02d3280>] ? release_pages+0x1b0/0x1e0 > [ 296.950597] [<c03069df>] ? fput+0x12f/0x1e0 > [ 296.950608] [<c02e983a>] ? remove_vma+0x3a/0x50 > [ 296.950619] [<c023f886>] __cond_resched+0x16/0x30 > [ 296.950628] [<c05aede3>] _cond_resched+0x23/0x30 > [ 296.950637] [<c0248cdc>] put_files_struct+0x6c/0xb0 > [ 296.950646] [<c0248dac>] exit_files+0x3c/0x50 > [ 296.950655] [<c02491de>] do_exit+0x15e/0x780 > [ 296.950664] [<c0247227>] ? kmsg_dump+0x37/0xd0 > [ 296.950673] [<c05ade7d>] ? printk+0x28/0x2b > [ 296.950684] [<c05b1fdd>] oops_end+0x8d/0xd0 > [ 296.950694] [<c02270be>] no_context+0xbe/0x150 > [ 296.950704] [<c02272d7>] __bad_area_nosemaphore+0x37/0x170 > [ 296.950714] [<c0227422>] bad_area_nosemaphore+0x12/0x20 > [ 296.950724] [<c05b3ed4>] do_page_fault+0x2c4/0x420 > [ 296.950735] [<c02cfc8e>] ? __alloc_pages_nodemask+0xee/0x6e0 > [ 296.950746] [<c022bcd7>] ? kmap_atomic_prot+0x47/0xf0 > [ 296.950757] [<c05b3c10>] ? spurious_fault+0xd0/0xd0 > [ 296.950766] [<c05b158a>] error_code+0x5a/0x60 > [ 296.950776] [<c05b3c10>] ? spurious_fault+0xd0/0xd0 > [ 296.950785] [<c022bcab>] ? kmap_atomic_prot+0x1b/0xf0 > [ 296.950794] [<c022bd8e>] __kmap_atomic+0xe/0x10 > [ 296.950841] [<f888a278>] read_extent_buffer+0x88/0x140 [btrfs] > [ 296.950886] [<f8899e5f>] add_inode_ref+0x22f/0x370 [btrfs] > [ 296.950927] [<f889b7fe>] replay_one_buffer+0x21e/0x2e0 [btrfs] > [ 296.950972] [<f8898e61>] walk_down_log_tree+0x1d1/0x360 [btrfs] > [ 296.951012] [<f8899066>] walk_log_tree+0x76/0x1e0 [btrfs] > [ 296.951023] [<c03e585a>] ? radix_tree_lookup+0xa/0x10 > [ 296.951064] [<f889d47c>] btrfs_recover_log_trees+0x1dc/0x2a0 [btrfs] > [ 296.951104] [<f889b5e0>] ? replay_one_extent+0x6a0/0x6a0 [btrfs] > [ 296.951156] [<f88624c5>] open_ctree+0x11c5/0x1510 [btrfs] > [ 296.951168] [<c03e7ad9>] ? strlcpy+0x39/0x60 > [ 296.951198] [<f8842651>] btrfs_mount+0x461/0x590 [btrfs] > [ 296.951209] [<c02e2300>] ? pcpu_alloc+0x2c0/0x850 > [ 296.951221] [<c0307f25>] mount_fs+0x35/0x180 > [ 296.951232] [<c031cfe6>] vfs_kern_mount+0x46/0xa0 > [ 296.951242] [<c031ddd9>] do_kern_mount+0x39/0xd0 > [ 296.951251] [<c031f544>] do_mount+0x594/0x6c0 > [ 296.951261] [<c02d02a6>] ? __get_free_pages+0x26/0x30 > [ 296.951270] [<c031ee89>] ? copy_mount_options+0x39/0x120 > [ 296.951279] [<c031f996>] sys_mount+0x66/0xa0 > [ 296.951289] [<c05b745c>] sysenter_do_call+0x12/0x28 > > > > Thanks! > -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
