kernel BUG at fs/btrfs/inode.c:794!

kernel BUG at fs/btrfs/inode.c:794!

[Jonathan Yip]

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Hi all,

Previous e-mail was sent without any reply, and was filed erroneously as
a reply to another e-mail on the list, thus re-sending.

Running on kernel 3.0 without patches.  Mount options for the btrfs
partition in question were `defaults, noatime, compress=lzo,
space_cache, autodefrag, inoce_cache'.  Partition cannot be mounted
again with a  3.0 kernel after reboot.  Partition can, however, be
mounted successfully with a 2.6.38 kernel (stock Ubuntu patches) without
options, and afterwards successfully with the 3.0 kernel.

> Aug  1 11:12:22 Eve kernel: [  154.594512] ------------[ cut here ]------------
> Aug  1 11:12:22 Eve kernel: [  154.594541] kernel BUG at fs/btrfs/inode.c:794!
> Aug  1 11:12:22 Eve kernel: [  154.594554] invalid opcode: 0000 [#1] PREEMPT SMP 
> Aug  1 11:12:22 Eve kernel: [  154.594573] CPU 0 
> Aug  1 11:12:22 Eve kernel: [  154.594586] Modules linked in: cryptd aes_x86_64 aes_generic vboxnetadp vboxnetflt vboxdrv binfmt_misc parport_pc ppdev snd_hda_codec_realtek uvcvideo snd_hda_intel dell_wmi snd_hda_codec videodev dell_laptop joydev arc4 v4l2_compat_ioctl32 coretemp snd_hwdep snd_pcm snd_seq_midi lp psmouse serio_raw snd_rawmidi snd_seq_midi_event iwl4965 iwl_legacy r8169 mac80211 snd_seq snd_timer snd_seq_device sparse_keymap snd cfg80211 dcdbas parport soundcore snd_page_alloc nouveau ahci libahci ttm drm_kms_helper drm i2c_algo_bit mxm_wmi video btrfs zlib_deflate libcrc32c
> Aug  1 11:12:22 Eve kernel: [  154.594740] 
> Aug  1 11:12:22 Eve kernel: [  154.594745] Pid: 801, comm: btrfs-transacti Not tainted 3.0.0-vanilla #1 Dell Inc. Vostro1310/0G930C
> Aug  1 11:12:22 Eve kernel: [  154.594762] RIP: 0010:[<ffffffffa004604c>]  [<ffffffffa004604c>] cow_file_range+0x37c/0x390 [btrfs]
> Aug  1 11:12:22 Eve kernel: [  154.594793] RSP: 0018:ffff880132c63550  EFLAGS: 00010246
> Aug  1 11:12:22 Eve kernel: [  154.594801] RAX: ffff88013628c000 RBX: 0000000000001000 RCX: 00000000000a5fff
> Aug  1 11:12:22 Eve kernel: [  154.594811] RDX: ffff8801362dd000 RSI: ffffea0003a25100 RDI: ffff88012894d158
> Aug  1 11:12:22 Eve kernel: [  154.594820] RBP: ffff880132c63600 R08: ffff880132c6389c R09: ffff880132c63880
> Aug  1 11:12:22 Eve kernel: [  154.594829] R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000000
> Aug  1 11:12:22 Eve kernel: [  154.594948] R13: 00000000000a5fff R14: ffff88012894cfc0 R15: ffff88012894d158
> Aug  1 11:12:22 Eve kernel: [  154.594959] FS:  0000000000000000(0000) GS:ffff88013fc00000(0000) knlGS:0000000000000000
> Aug  1 11:12:22 Eve kernel: [  154.594969] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> Aug  1 11:12:22 Eve kernel: [  154.594978] CR2: 00007fe916cb3000 CR3: 000000000174b000 CR4: 00000000000006f0
> Aug  1 11:12:22 Eve kernel: [  154.594987] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> Aug  1 11:12:22 Eve kernel: [  154.594998] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> Aug  1 11:12:22 Eve kernel: [  154.595008] Process btrfs-transacti (pid: 801, threadinfo ffff880132c62000, task ffff880137d0c020)
> Aug  1 11:12:22 Eve kernel: [  154.595019] Stack:
> Aug  1 11:12:22 Eve kernel: [  154.595024]  ffff880136dbac60 ffff880137f3c000 fffffffffffffff6 00001d21f1800080
> Aug  1 11:12:22 Eve kernel: [  154.595042]  0000000000000000 0000001d21e9a000 ffffea0003a25100 00001d21f1800080
> Aug  1 11:12:22 Eve kernel: [  154.595060]  ffff8801362dd000 ffff880132c6389c ffff880132c63880 ffff88012894cfe0
> Aug  1 11:12:22 Eve kernel: [  154.595078] Call Trace:
> Aug  1 11:12:22 Eve kernel: [  154.595097]  [<ffffffffa00463af>] run_delalloc_nocow+0x34f/0x830 [btrfs]
> Aug  1 11:12:22 Eve kernel: [  154.595119]  [<ffffffffa005eae7>] ? free_extent_state+0x37/0x60 [btrfs]
> Aug  1 11:12:22 Eve kernel: [  154.595143]  [<ffffffffa0046c0c>] run_delalloc_range+0x37c/0x380 [btrfs]
> Aug  1 11:12:22 Eve kernel: [  154.595158]  [<ffffffff81106cd9>] ? zone_statistics+0x99/0xc0
> Aug  1 11:12:22 Eve kernel: [  154.595178]  [<ffffffffa0061d25>] __extent_writepage+0x5d5/0x730 [btrfs]
> Aug  1 11:12:22 Eve kernel: [  154.595191]  [<ffffffff812c8b8d>] ? radix_tree_gang_lookup_tag_slot+0x8d/0xd0
> Aug  1 11:12:22 Eve kernel: [  154.595212]  [<ffffffffa00620ca>] extent_write_cache_pages.clone.18.clone.25+0x24a/0x300 [btrfs]
> Aug  1 11:12:22 Eve kernel: [  154.595435]  [<ffffffffa0062425>] extent_writepages+0x45/0x60 [btrfs]
> Aug  1 11:12:22 Eve kernel: [  154.595435]  [<ffffffffa0042d30>] ? btrfs_real_readdir+0x650/0x650 [btrfs]
> Aug  1 11:12:22 Eve kernel: [  154.595435]  [<ffffffffa005eae6>] ? free_extent_state+0x36/0x60 [btrfs]
> Aug  1 11:12:22 Eve kernel: [  154.595435]  [<ffffffffa00414c7>] btrfs_writepages+0x27/0x30 [btrfs]
> Aug  1 11:12:22 Eve kernel: [  154.595435]  [<ffffffff810f41f1>] do_writepages+0x21/0x40
> Aug  1 11:12:22 Eve kernel: [  154.595435]  [<ffffffff810ea51b>] __filemap_fdatawrite_range+0x5b/0x60
> Aug  1 11:12:22 Eve kernel: [  154.595435]  [<ffffffff810eb39f>] filemap_fdatawrite+0x1f/0x30
> Aug  1 11:12:22 Eve kernel: [  154.595435]  [<ffffffff810eb3e5>] filemap_write_and_wait+0x35/0x60
> Aug  1 11:12:22 Eve kernel: [  154.595435]  [<ffffffffa007b2cb>] __btrfs_write_out_cache+0xa6b/0xc90 [btrfs]
> Aug  1 11:12:22 Eve kernel: [  154.595435]  [<ffffffffa0044f16>] ? __btrfs_prealloc_file_range+0x196/0x220 [btrfs]
> Aug  1 11:12:22 Eve kernel: [  154.595435]  [<ffffffff81160e5a>] ? igrab+0x3a/0x70
> Aug  1 11:12:22 Eve kernel: [  154.595435]  [<ffffffffa007d679>] btrfs_write_out_ino_cache+0x99/0xd0 [btrfs]
> Aug  1 11:12:22 Eve kernel: [  154.595435]  [<ffffffffa00362fe>] btrfs_save_ino_cache+0x16e/0x260 [btrfs]
> Aug  1 11:12:22 Eve kernel: [  154.595435]  [<ffffffffa003daf2>] commit_fs_roots.clone.21+0xc2/0x1a0 [btrfs]
> Aug  1 11:12:22 Eve kernel: [  154.595435]  [<ffffffffa001a60a>] ? btrfs_free_path+0x2a/0x40 [btrfs]
> Aug  1 11:12:22 Eve kernel: [  154.595435]  [<ffffffffa003ead1>] btrfs_commit_transaction+0x471/0x900 [btrfs]
> Aug  1 11:12:22 Eve kernel: [  154.595435]  [<ffffffffa003dd1c>] ? join_transaction.clone.23+0x5c/0x230 [btrfs]
> Aug  1 11:12:22 Eve kernel: [  154.595435]  [<ffffffffa003f2f9>] ? start_transaction+0x99/0x2e0 [btrfs]
> Aug  1 11:12:22 Eve kernel: [  154.595435]  [<ffffffff8106eea0>] ? wake_up_bit+0x40/0x40
> Aug  1 11:12:22 Eve kernel: [  154.595435]  [<ffffffffa0037563>] transaction_kthread+0x273/0x290 [btrfs]
> Aug  1 11:12:22 Eve kernel: [  154.595435]  [<ffffffffa00372f0>] ? btrfs_congested_fn+0xc0/0xc0 [btrfs]
> Aug  1 11:12:22 Eve kernel: [  154.595435]  [<ffffffff8106e896>] kthread+0x96/0xa0
> Aug  1 11:12:22 Eve kernel: [  154.595435]  [<ffffffff81580494>] kernel_thread_helper+0x4/0x10
> Aug  1 11:12:22 Eve kernel: [  154.595435]  [<ffffffff8106e800>] ? kthread_worker_fn+0x190/0x190
> Aug  1 11:12:22 Eve kernel: [  154.595435]  [<ffffffff81580490>] ? gs_change+0xb/0xb
> Aug  1 11:12:22 Eve kernel: [  154.595435] Code: c0 5b 41 5c 41 5d 41 5e 41 5f c9 c3 4c 89 95 70 ff ff ff 4c 89 fe 48 8b 7d 88 e8 10 7b 00 00 4c 8b 95 70 ff ff ff e9 55 fd ff ff <0f> 0b 0f 0b 0f 0b 0f 0b 0f 0b 0f 0b 0f 1f 84 00 00 00 00 00 55 
> Aug  1 11:12:22 Eve kernel: [  154.595435] RIP  [<ffffffffa004604c>] cow_file_range+0x37c/0x390 [btrfs]
> Aug  1 11:12:22 Eve kernel: [  154.595435]  RSP <ffff880132c63550>
> Aug  1 11:12:22 Eve kernel: [  154.636938] ---[ end trace b93d3aede109651a ]---

Please tell if you need anything else,
Jonathan Yip


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