Hi all,
I executed the following simple sequence of commands:
# mount /dev/sda /mnt/btrfs
# btrfs quota enable /mnt/btrfs/
# btrfs subvolume create /mnt/btrfs/SV
Create subvolume '/mnt/btrfs/SV'
# btrfs qgroup limit 1m /mnt/btrfs/SV
# dd if=/dev/zero of=/mnt/btrfs/SV/file bs=64x1024
dd: writing `/mnt/btrfs/SV/file': Disk quota exceeded
16+0 records in
15+0 records out
983040 bytes (983 kB) copied, 0.00192474 s, 511 MB/s
# rm /mnt/btrfs/SV/file
The file was removed, but in the kern.log I see:
[67577.594688] ------------[ cut here ]------------
[67577.594723] WARNING: at /source/fs/btrfs/inode.c:7177
btrfs_destroy_inode+0x266/0x300 [btrfs]()
[67577.594726] Hardware name: Bochs
[67577.594728] Modules linked in: btrfs(O) libcrc32c deflate zlib_deflate
ctr twofish_generic twofish_x86_64_3way glue_helper lrw xts gf128mul
twofish_x86_64 twofish_common camellia_generic serpent_generic
blowfish_generic blowfish_x86_64 blowfish_common cast5_generic des_generic
xcbc rmd160 sha512_generic crypto_null af_key xfrm_algo kvm ppdev microcode
psmouse nfsv4 serio_raw nfsd nfs_acl auth_rpcgss nfs fscache lockd sunrpc
parport_pc mac_hid i2c_piix4 lp parport floppy [last unloaded: btrfs]
[67577.594788] Pid: 10692, comm: rm Tainted: G W O 3.7.0-560-generic
#57ba86c00f9573b63b8c06810d4f6915efed2442
[67577.594790] Call Trace:
[67577.594804] [<ffffffff81056d4f>] warn_slowpath_common+0x7f/0xc0
[67577.594810] [<ffffffff81056daa>] warn_slowpath_null+0x1a/0x20
[67577.594830] [<ffffffffa039b296>] btrfs_destroy_inode+0x266/0x300 [btrfs]
[67577.594838] [<ffffffff8119e16c>] destroy_inode+0x3c/0x70
[67577.594843] [<ffffffff8119e2d6>] evict+0x136/0x1d0
[67577.594849] [<ffffffff8119eb92>] iput_final+0xe2/0x170
[67577.594853] [<ffffffff8119ec5e>] iput+0x3e/0x50
[67577.594859] [<ffffffff8119167b>] do_unlinkat+0x12b/0x1d0
[67577.594867] [<ffffffff81698dde>] ? do_page_fault+0xe/0x10
[67577.594871] [<ffffffff816984d5>] ? do_async_page_fault+0x35/0xa0
[67577.594877] [<ffffffff81194042>] sys_unlinkat+0x22/0x40
[67577.594883] [<ffffffff8169d719>] system_call_fastpath+0x16/0x1b
[67577.594886] ---[ end trace 0b7f0b925e0b6048 ]---
[67577.594888] ------------[ cut here ]------------
[67577.594906] WARNING: at /source/fs/btrfs/inode.c:7178
btrfs_destroy_inode+0x2ef/0x300 [btrfs]()
[67577.594908] Hardware name: Bochs
[67577.594910] Modules linked in: btrfs(O) libcrc32c deflate zlib_deflate
ctr twofish_generic twofish_x86_64_3way glue_helper lrw xts gf128mul
twofish_x86_64 twofish_common camellia_generic serpent_generic
blowfish_generic blowfish_x86_64 blowfish_common cast5_generic des_generic
xcbc rmd160 sha512_generic crypto_null af_key xfrm_algo kvm ppdev microcode
psmouse nfsv4 serio_raw nfsd nfs_acl auth_rpcgss nfs fscache lockd sunrpc
parport_pc mac_hid i2c_piix4 lp parport floppy [last unloaded: btrfs]
[67577.594979] Pid: 10692, comm: rm Tainted: G W O 3.7.0-560-generic
#57ba86c00f9573b63b8c06810d4f6915efed2442
[67577.594981] Call Trace:
[67577.594988] [<ffffffff81056d4f>] warn_slowpath_common+0x7f/0xc0
[67577.594993] [<ffffffff81056daa>] warn_slowpath_null+0x1a/0x20
[67577.595012] [<ffffffffa039b31f>] btrfs_destroy_inode+0x2ef/0x300 [btrfs]
[67577.595017] [<ffffffff8119e16c>] destroy_inode+0x3c/0x70
[67577.595022] [<ffffffff8119e2d6>] evict+0x136/0x1d0
[67577.595027] [<ffffffff8119eb92>] iput_final+0xe2/0x170
[67577.595032] [<ffffffff8119ec5e>] iput+0x3e/0x50
[67577.595037] [<ffffffff8119167b>] do_unlinkat+0x12b/0x1d0
[67577.595042] [<ffffffff81698dde>] ? do_page_fault+0xe/0x10
[67577.595046] [<ffffffff816984d5>] ? do_async_page_fault+0x35/0xa0
[67577.595051] [<ffffffff81194042>] sys_unlinkat+0x22/0x40
[67577.595056] [<ffffffff8169d719>] system_call_fastpath+0x16/0x1b
[67577.595059] ---[ end trace 0b7f0b925e0b6049 ]---
Then, when I delete the subvolume and unmount the file system I also get
warnings:
# btrfs subvolume delete /mnt/btrfs/SV
Delete subvolume '/mnt/btrfs/SV'
# umount /mnt/btrfs
[67847.557519] ------------[ cut here ]------------
[67847.557550] WARNING: at /source/fs/btrfs/extent-tree.c:4366
btrfs_free_block_groups+0x2ce/0x370 [btrfs]()
[67847.557553] Hardware name: Bochs
[67847.557554] Modules linked in: btrfs(O) libcrc32c deflate zlib_deflate
ctr twofish_generic twofish_x86_64_3way glue_helper lrw xts gf128mul
twofish_x86_64 twofish_common camellia_generic serpent_generic
blowfish_generic blowfish_x86_64 blowfish_common cast5_generic des_generic
xcbc rmd160 sha512_generic crypto_null af_key xfrm_algo kvm ppdev microcode
psmouse nfsv4 serio_raw nfsd nfs_acl auth_rpcgss nfs fscache lockd sunrpc
parport_pc mac_hid i2c_piix4 lp parport floppy [last unloaded: btrfs]
[67847.557614] Pid: 10706, comm: umount Tainted: G W O
3.7.0-560-generic #57ba86c00f9573b63b8c06810d4f6915efed2442
[67847.557616] Call Trace:
[67847.557629] [<ffffffff81056d4f>] warn_slowpath_common+0x7f/0xc0
[67847.557635] [<ffffffff81056daa>] warn_slowpath_null+0x1a/0x20
[67847.557651] [<ffffffffa037ba2e>] btrfs_free_block_groups+0x2ce/0x370
[btrfs]
[67847.557669] [<ffffffffa0388817>] close_ctree+0x1c7/0x310 [btrfs]
[67847.557678] [<ffffffff8119f07e>] ? evict_inodes+0xce/0x130
[67847.557689] [<ffffffffa035e6d9>] btrfs_put_super+0x19/0x20 [btrfs]
[67847.557697] [<ffffffff811863a2>] generic_shutdown_super+0x62/0xf0
[67847.557703] [<ffffffff811864c6>] kill_anon_super+0x16/0x30
[67847.557714] [<ffffffffa03625ca>] btrfs_kill_super+0x1a/0x90 [btrfs]
[67847.557720] [<ffffffff81186a6c>] deactivate_locked_super+0x3c/0x90
[67847.557725] [<ffffffff8118740e>] deactivate_super+0x4e/0x70
[67847.557730] [<ffffffff811a3276>] mntput_no_expire+0x106/0x160
[67847.557734] [<ffffffff811a4836>] sys_umount+0x66/0xe0
[67847.557742] [<ffffffff8169d719>] system_call_fastpath+0x16/0x1b
[67847.557745] ---[ end trace 0b7f0b925e0b604a ]---
[67847.557747] ------------[ cut here ]------------
[67847.557761] WARNING: at /source/fs/btrfs/extent-tree.c:4367
btrfs_free_block_groups+0x368/0x370 [btrfs]()
[67847.557763] Hardware name: Bochs
[67847.557765] Modules linked in: btrfs(O) libcrc32c deflate zlib_deflate
ctr twofish_generic twofish_x86_64_3way glue_helper lrw xts gf128mul
twofish_x86_64 twofish_common camellia_generic serpent_generic
blowfish_generic blowfish_x86_64 blowfish_common cast5_generic des_generic
xcbc rmd160 sha512_generic crypto_null af_key xfrm_algo kvm ppdev microcode
psmouse nfsv4 serio_raw nfsd nfs_acl auth_rpcgss nfs fscache lockd sunrpc
parport_pc mac_hid i2c_piix4 lp parport floppy [last unloaded: btrfs]
[67847.557803] Pid: 10706, comm: umount Tainted: G W O
3.7.0-560-generic #57ba86c00f9573b63b8c06810d4f6915efed2442
[67847.557805] Call Trace:
[67847.557811] [<ffffffff81056d4f>] warn_slowpath_common+0x7f/0xc0
[67847.557816] [<ffffffff81056daa>] warn_slowpath_null+0x1a/0x20
[67847.557863] [<ffffffffa037bac8>] btrfs_free_block_groups+0x368/0x370
[btrfs]
[67847.557883] [<ffffffffa0388817>] close_ctree+0x1c7/0x310 [btrfs]
[67847.557889] [<ffffffff8119f07e>] ? evict_inodes+0xce/0x130
[67847.557900] [<ffffffffa035e6d9>] btrfs_put_super+0x19/0x20 [btrfs]
[67847.557906] [<ffffffff811863a2>] generic_shutdown_super+0x62/0xf0
[67847.557912] [<ffffffff811864c6>] kill_anon_super+0x16/0x30
[67847.557923] [<ffffffffa03625ca>] btrfs_kill_super+0x1a/0x90 [btrfs]
[67847.557929] [<ffffffff81186a6c>] deactivate_locked_super+0x3c/0x90
[67847.557934] [<ffffffff8118740e>] deactivate_super+0x4e/0x70
[67847.557938] [<ffffffff811a3276>] mntput_no_expire+0x106/0x160
[67847.557942] [<ffffffff811a4836>] sys_umount+0x66/0xe0
[67847.557948] [<ffffffff8169d719>] system_call_fastpath+0x16/0x1b
[67847.557951] ---[ end trace 0b7f0b925e0b604b ]---
[67847.557954] ------------[ cut here ]------------
[67847.557967] WARNING: at /source/fs/btrfs/extent-tree.c:7659
btrfs_free_block_groups+0x262/0x370 [btrfs]()
[67847.557969] Hardware name: Bochs
[67847.557970] Modules linked in: btrfs(O) libcrc32c deflate zlib_deflate
ctr twofish_generic twofish_x86_64_3way glue_helper lrw xts gf128mul
twofish_x86_64 twofish_common camellia_generic serpent_generic
blowfish_generic blowfish_x86_64 blowfish_common cast5_generic des_generic
xcbc rmd160 sha512_generic crypto_null af_key xfrm_algo kvm ppdev microcode
psmouse nfsv4 serio_raw nfsd nfs_acl auth_rpcgss nfs fscache lockd sunrpc
parport_pc mac_hid i2c_piix4 lp parport floppy [last unloaded: btrfs]
[67847.558010] Pid: 10706, comm: umount Tainted: G W O
3.7.0-560-generic #57ba86c00f9573b63b8c06810d4f6915efed2442
[67847.558011] Call Trace:
[67847.558017] [<ffffffff81056d4f>] warn_slowpath_common+0x7f/0xc0
[67847.558022] [<ffffffff81056daa>] warn_slowpath_null+0x1a/0x20
[67847.558035] [<ffffffffa037b9c2>] btrfs_free_block_groups+0x262/0x370
[btrfs]
[67847.558050] [<ffffffffa0388817>] close_ctree+0x1c7/0x310 [btrfs]
[67847.558055] [<ffffffff8119f07e>] ? evict_inodes+0xce/0x130
[67847.558067] [<ffffffffa035e6d9>] btrfs_put_super+0x19/0x20 [btrfs]
[67847.558073] [<ffffffff811863a2>] generic_shutdown_super+0x62/0xf0
[67847.558078] [<ffffffff811864c6>] kill_anon_super+0x16/0x30
[67847.558089] [<ffffffffa03625ca>] btrfs_kill_super+0x1a/0x90 [btrfs]
[67847.558095] [<ffffffff81186a6c>] deactivate_locked_super+0x3c/0x90
[67847.558100] [<ffffffff8118740e>] deactivate_super+0x4e/0x70
[67847.558104] [<ffffffff811a3276>] mntput_no_expire+0x106/0x160
[67847.558108] [<ffffffff811a4836>] sys_umount+0x66/0xe0
[67847.558113] [<ffffffff8169d719>] system_call_fastpath+0x16/0x1b
[67847.558116] ---[ end trace 0b7f0b925e0b604c ]---
[67847.558119] space_info 4 has 1073647616 free, is not full
[67847.558122] space_info total=1082130432, used=28672, pinned=0,
reserved=0, may_use=196608, readonly=8454144
Is this an expected behavior? Am I doing anything wrong here?
Thanks,
-Lev.
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