On 2013/04/03 10:19, Tsutomu Itoh wrote:
> Hi,
> 
> When inode_cache was specified for the mount option, I encountered the
> following messages at umount.
> 
> Step to reproduce:
> 
>   mkfs.btrfs -f /dev/sdc4
>   mount -o compress=lzo,autodefrag,inode_cache /dev/sdc4 /test1
>   dd if=/dev/zero of=/test1/file1 bs=1M count=8192
>   dd if=/test1/file1 of=/dev/null bs=1M
>   rm -f /test1/file1
>   umount /test1

The size of my test partition is about 20GB.

# df -T /test1
Filesystem     Type  1K-blocks  Used Available Use% Mounted on
/dev/sdc4      btrfs  19530752    56  17404928   1% /test1
# btrfs fi sh /dev/sdc4
Label: none  uuid: d4937df0-618d-4854-8fac-5b5c9aa3c84f
        Total devices 1 FS bytes used 28.00KB
        devid    1 size 18.63GB used 2.04GB path /dev/sdc4

Btrfs v0.20-rc1-253-g7854c8b
# btrfs fi df /test1
Data: total=8.00MB, used=0.00
System, DUP: total=8.00MB, used=4.00KB
System: total=4.00MB, used=0.00
Metadata, DUP: total=1.00GB, used=24.00KB
Metadata: total=8.00MB, used=0.00

- Tsutomu

> 
> Thanks,
> Tsutomu
> 
> ==========================================================================================
> 
> Apr  3 09:42:29 luna kernel: [  511.911342] btrfs: use lzo compression
> Apr  3 09:42:29 luna kernel: [  511.911348] btrfs: enabling auto defrag
> Apr  3 09:42:29 luna kernel: [  511.911352] btrfs: enabling inode map caching
> Apr  3 09:42:29 luna kernel: [  511.911353] btrfs: disk space caching is 
> enabled
> Apr  3 09:43:12 luna kernel: [  554.638768] ------------[ cut here 
> ]------------
> Apr  3 09:43:12 luna kernel: [  554.638815] WARNING: at fs/btrfs/super.c:255 
> __btrfs_abort_transaction+0x55/0xdc [btrfs]()
> Apr  3 09:43:12 luna kernel: [  554.638818] Hardware name: PRIMERGY
> Apr  3 09:43:12 luna kernel: [  554.638822] Modules linked in: btrfs(O) 
> raid6_pq zlib_deflate xor crc32c libcrc32c ebtable_nat ebtables bnx2i cnic 
> uio xt_CHECKSUM cxgb4i iptable_mangle cxgb4 cxgb3i cxgb3 mdio libcxgbi bridge 
> stp llc iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi nfsd auth_rpcgss 
> acpi_cpufreq mperf vhost_net freq_table coretemp tun nfs_acl lockd kvm 
> dm_mirror dm_region_hash iTCO_wdt dm_log dm_mod iTCO_vendor_support tg3 
> shpchp sunrpc lpc_ich mfd_core ptp pci_hotplug i3000_edac edac_core pps_core 
> microcode i2c_i801 pcspkr i2c_core uinput ipv6 autofs4 ext4 crc16 jbd2 
> mbcache sr_mod cdrom sd_mod crc_t10dif ata_piix libata megaraid_sas scsi_mod
> Apr  3 09:43:12 luna kernel: [  554.638898] Pid: 1749, comm: btrfs-transacti 
> Tainted: G           O 3.9.0-rc5 #1
> Apr  3 09:43:12 luna kernel: [  554.638900] Call Trace:
> Apr  3 09:43:12 luna kernel: [  554.638909]  [<ffffffff8103e52f>] 
> warn_slowpath_common+0x83/0x9e
> Apr  3 09:43:12 luna kernel: [  554.638914]  [<ffffffff8103e5ed>] 
> warn_slowpath_fmt+0x46/0x48
> Apr  3 09:43:12 luna kernel: [  554.638931]  [<ffffffffa040db62>] 
> __btrfs_abort_transaction+0x55/0xdc [btrfs]
> Apr  3 09:43:12 luna kernel: [  554.638960]  [<ffffffffa04601e4>] ? 
> btrfs_truncate_free_space_cache+0x6c/0x122 [btrfs]
> Apr  3 09:43:12 luna kernel: [  554.638981]  [<ffffffffa0426513>] 
> btrfs_save_ino_cache+0x190/0x2f9 [btrfs]
> Apr  3 09:43:12 luna kernel: [  554.639003]  [<ffffffffa042cc6c>] 
> commit_fs_roots.isra.27+0xa6/0x14e [btrfs]
> Apr  3 09:43:12 luna kernel: [  554.639026]  [<ffffffff81064690>] ? 
> should_resched+0x9/0x28
> Apr  3 09:43:12 luna kernel: [  554.639045]  [<ffffffff813dc287>] ? 
> _cond_resched+0xe/0x22
> Apr  3 09:43:12 luna kernel: [  554.639079]  [<ffffffffa042e434>] 
> btrfs_commit_transaction+0x471/0x898 [btrfs]
> Apr  3 09:43:12 luna kernel: [  554.639084]  [<ffffffff8105a8d2>] ? 
> bit_waitqueue+0x7a/0x7a
> Apr  3 09:43:12 luna kernel: [  554.639106]  [<ffffffffa0427820>] 
> transaction_kthread+0xef/0x190 [btrfs]
> Apr  3 09:43:12 luna kernel: [  554.639127]  [<ffffffffa0427731>] ? 
> try_to_freeze+0x32/0x32 [btrfs]
> Apr  3 09:43:12 luna kernel: [  554.639130]  [<ffffffff8105a2b9>] 
> kthread+0x8d/0x95
> Apr  3 09:43:12 luna kernel: [  554.639134]  [<ffffffff8105a22c>] ? 
> __kthread_parkme+0x65/0x65
> Apr  3 09:43:12 luna kernel: [  554.639138]  [<ffffffff813e3f2c>] 
> ret_from_fork+0x7c/0xb0
> Apr  3 09:43:12 luna kernel: [  554.639142]  [<ffffffff8105a22c>] ? 
> __kthread_parkme+0x65/0x65
> Apr  3 09:43:12 luna kernel: [  554.639145] ---[ end trace ab791b60ae901bf9 
> ]---
> Apr  3 09:43:12 luna kernel: [  554.639149] BTRFS error (device sdc4) in 
> btrfs_save_ino_cache:471: error 28
> Apr  3 09:43:12 luna kernel: [  554.639153] btrfs is forced readonly
> Apr  3 09:43:12 luna kernel: [  554.640329] BTRFS warning (device sdc4): 
> Skipping commit of aborted transaction.
> Apr  3 09:43:12 luna kernel: [  554.640335] BTRFS error (device sdc4) in 
> cleanup_transaction:1455: error 28
> Apr  3 09:43:12 luna kernel: [  554.832554] ------------[ cut here 
> ]------------
> Apr  3 09:43:12 luna kernel: [  554.832587] WARNING: at 
> fs/btrfs/extent-tree.c:130 btrfs_put_block_group+0x4e/0x66 [btrfs]()
> Apr  3 09:43:12 luna kernel: [  554.832590] Hardware name: PRIMERGY
> Apr  3 09:43:12 luna kernel: [  554.832592] Modules linked in: btrfs(O) 
> raid6_pq zlib_deflate xor crc32c libcrc32c ebtable_nat ebtables bnx2i cnic 
> uio xt_CHECKSUM cxgb4i iptable_mangle cxgb4 cxgb3i cxgb3 mdio libcxgbi bridge 
> stp llc iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi nfsd auth_rpcgss 
> acpi_cpufreq mperf vhost_net freq_table coretemp tun nfs_acl lockd kvm 
> dm_mirror dm_region_hash iTCO_wdt dm_log dm_mod iTCO_vendor_support tg3 
> shpchp sunrpc lpc_ich mfd_core ptp pci_hotplug i3000_edac edac_core pps_core 
> microcode i2c_i801 pcspkr i2c_core uinput ipv6 autofs4 ext4 crc16 jbd2 
> mbcache sr_mod cdrom sd_mod crc_t10dif ata_piix libata megaraid_sas scsi_mod
> Apr  3 09:43:12 luna kernel: [  554.832663] Pid: 1787, comm: umount Tainted: 
> G        W  O 3.9.0-rc5 #1
> Apr  3 09:43:12 luna kernel: [  554.832665] Call Trace:
> Apr  3 09:43:12 luna kernel: [  554.832674]  [<ffffffff8103e52f>] 
> warn_slowpath_common+0x83/0x9e
> Apr  3 09:43:12 luna kernel: [  554.832679]  [<ffffffff8103e564>] 
> warn_slowpath_null+0x1a/0x1c
> Apr  3 09:43:12 luna kernel: [  554.832697]  [<ffffffffa0419c0f>] 
> btrfs_put_block_group+0x4e/0x66 [btrfs]
> Apr  3 09:43:12 luna kernel: [  554.832717]  [<ffffffffa0420182>] 
> btrfs_free_block_groups+0xec/0x286 [btrfs]
> Apr  3 09:43:12 luna kernel: [  554.832740]  [<ffffffffa042ae0d>] 
> close_ctree+0x200/0x32f [btrfs]
> Apr  3 09:43:12 luna kernel: [  554.832745]  [<ffffffff81133f91>] ? 
> evict_inodes+0xe0/0xef
> Apr  3 09:43:12 luna kernel: [  554.832761]  [<ffffffffa040abec>] 
> btrfs_put_super+0x19/0x1b [btrfs]
> Apr  3 09:43:12 luna kernel: [  554.832766]  [<ffffffff81121106>] 
> generic_shutdown_super+0x57/0xd3
> Apr  3 09:43:12 luna kernel: [  554.832770]  [<ffffffff8112124c>] 
> kill_anon_super+0x14/0x20
> Apr  3 09:43:12 luna kernel: [  554.832785]  [<ffffffffa040aa2b>] 
> btrfs_kill_super+0x17/0x23 [btrfs]
> Apr  3 09:43:12 luna kernel: [  554.832789]  [<ffffffff81121639>] 
> deactivate_locked_super+0x26/0x52
> Apr  3 09:43:12 luna kernel: [  554.832793]  [<ffffffff8112186e>] 
> deactivate_super+0x38/0x3d
> Apr  3 09:43:12 luna kernel: [  554.832798]  [<ffffffff8113710d>] 
> mntput_no_expire+0x11e/0x126
> Apr  3 09:43:12 luna kernel: [  554.832802]  [<ffffffff81137f0d>] 
> sys_umount+0x2fa/0x31b
> Apr  3 09:43:12 luna kernel: [  554.832806]  [<ffffffff813e3fd9>] 
> system_call_fastpath+0x16/0x1b
> Apr  3 09:43:12 luna kernel: [  554.832809] ---[ end trace ab791b60ae901bfa 
> ]---
> 
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