Btrfs Issues

[Manish Katiyar]

On Wed, Aug 27, 2014 at 8:37 PM, nick <xerofoify at gmail.com> wrote:

>
>
> On 14-08-27 11:07 PM, Manish Katiyar wrote:
> > Is your btrfs on an external drive and did you remove the drive and then
> > try to unmount the filesystem ?
> >
> > Thanks -
> > Manish
> >
> >
> > On Wed, Aug 27, 2014 at 1:22 PM, nick <xerofoify at gmail.com> wrote:
> >
> >> When booting on an Ubuntu kernel I am hitting this in my dmesg with an
> >> external drive I have.
> >> I am wondering if this is a bug or just a common issue.
> >> 8518.918519] ------------[ cut here ]------------
> >> [ 8518.918528] WARNING: CPU: 1 PID: 13778 at
> >> /build/buildd/linux-3.13.0/fs/btrfs/super.c:254
> >> __btrfs_abort_transaction+0x50/0x110 [btrfs]()
> >> [ 8518.918529] btrfs: Transaction aborted (error -5)
> >> [ 8518.918530] Modules linked in: btrfs raid6_pq libcrc32c xor ses
> >> enclosure usb_storage bnep rfcomm bluetooth hid_generic usbhid hid
> >> eeepc_wmi asus_wmi sparse_keymap intel_rapl x86_pkg_temp_thermal
> >> intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul
> >> ghash_clmulni_intel snd_hda_codec_hdmi aesni_intel aes_x86_64 lrw
> gf128mul
> >> glue_helper ablk_helper cryptd serio_raw snd_hda_codec_realtek lpc_ich
> >> snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_seq_midi_event
> >> snd_pcm snd_rawmidi snd_page_alloc fglrx(POF) snd_seq parport_pc
> >> snd_seq_device snd_timer ppdev wmi mei_me snd mei mac_hid lp parport
> >> soundcore amd_iommu_v2 video ahci libahci r8169 mii
> >> [ 8518.918560] CPU: 1 PID: 13778 Comm: umount Tainted: PF       W  O
> >> 3.13.0-34-generic #60-Ubuntu
> >> [ 8518.918561] Hardware name: System manufacturer System Product
> >> Name/P8Z68-V LE, BIOS 3506 01/17/2012
> >> [ 8518.918562]  0000000000000009 ffff8801c9ad5c50 ffffffff8171bd94
> >> ffff8801c9ad5c98
> >> [ 8518.918564]  ffff8801c9ad5c88 ffffffff810676cd 00000000fffffffb
> >> ffff880211d72800
> >> [ 8518.918566]  ffff8801c49d8000 ffffffffa0bb2e90 000000000000060b
> >> ffff8801c9ad5ce8
> >> [ 8518.918568] Call Trace:
> >> [ 8518.918573]  [<ffffffff8171bd94>] dump_stack+0x45/0x56
> >> [ 8518.918576]  [<ffffffff810676cd>] warn_slowpath_common+0x7d/0xa0
> >> [ 8518.918578]  [<ffffffff8106773c>] warn_slowpath_fmt+0x4c/0x50
> >> [ 8518.918583]  [<ffffffffa0b16f00>]
> __btrfs_abort_transaction+0x50/0x110
> >> [btrfs]
> >> [ 8518.918591]  [<ffffffffa0b40ebe>] cleanup_transaction+0x6e/0x290
> [btrfs]
> >> [ 8518.918594]  [<ffffffff810aaf00>] ? prepare_to_wait_event+0x100/0x100
> >> [ 8518.918601]  [<ffffffffa0b41e3a>]
> btrfs_commit_transaction+0x6ea/0x970
> >> [btrfs]
> >> [ 8518.918608]  [<ffffffffa0b3c00f>] btrfs_commit_super+0x8f/0xa0
> [btrfs]
> >> [ 8518.918614]  [<ffffffffa0b3dac0>] close_ctree+0x1e0/0x290 [btrfs]
> >> [ 8518.918617]  [<ffffffff811d8c2c>] ? evict_inodes+0x11c/0x130
> >> [ 8518.918622]  [<ffffffffa0b139b9>] btrfs_put_super+0x19/0x20 [btrfs]
> >> [ 8518.918625]  [<ffffffff811beda2>] generic_shutdown_super+0x72/0xf0
> >> [ 8518.918627]  [<ffffffff811befe2>] kill_anon_super+0x12/0x20
> >> [ 8518.918631]  [<ffffffffa0b15eb6>] btrfs_kill_super+0x16/0x90 [btrfs]
> >> [ 8518.918634]  [<ffffffff811bf33d>] deactivate_locked_super+0x3d/0x60
> >> [ 8518.918636]  [<ffffffff811bf8f6>] deactivate_super+0x46/0x60
> >> [ 8518.918638]  [<ffffffff811dc5f6>] mntput_no_expire+0xd6/0x170
> >> [ 8518.918640]  [<ffffffff811ddb6e>] SyS_umount+0x8e/0x100
> >> [ 8518.918642]  [<ffffffff8172c97f>] tracesys+0xe1/0xe6
> >> [ 8518.918644] ---[ end trace 1a6b295c1d8ad4c3 ]---
> >> Nick
> >>
> >> _______________________________________________
> >> Kernelnewbies mailing list
> >> Kernelnewbies at kernelnewbies.org
> >> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
> >>
> >
> No I just pulled it out and then I get this error. Maybe this is normally
> when not unmounted?
> Nick
>

This is expected then. It was middle of a journal transaction when you
pulled the device out.
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