Filebench varmail can not run in btrfs of kernel 3.8.2

Filebench varmail can not run in btrfs of kernel 3.8.2

[ZHANG, Benlong]

Hello,
    When I run filebench varmail test under btrfs of Linux kernel 3.8.2, I got this error:

[11496.552440] WARNING: at fs/btrfs/tree-log.c:3825 btrfs_log_inode_parent+0x28e/0x2f1 [btrfs]()
[11496.552560] Hardware name: PowerEdge R910
[11496.552644] Modules linked in: brd loop dm_crypt mperf coretemp kvm_intel snd_pcm kvm snd_timer snd usb_storage tpm_tis soundcore joydev psmouse snd_page_alloc tpm processor thermal_sys lpc_ich hid_generic serio_raw dcdbas ehci_pci evdev pcspkr tpm_bios microcode mfd_core button ext3 jbd mbcache dm_mod btrfs zlib_deflate crc32c libcrc32c sg sr_mod cdrom ses sd_mod enclosure crc_t10dif ata_generic usbhid hid qla2xxx scsi_transport_fc scsi_tgt crc32c_intel ata_piix uhci_hcd libata ehci_hcd megaraid_sas usbcore scsi_mod usb_common bnx2
[11496.556105] Pid: 4865, comm: filebench Tainted: G      D W    3.8.2-debug #60
[11496.556198] Call Trace:
[11496.556291]  [<ffffffff81040a43>] warn_slowpath_common+0x80/0x98
[11496.556384]  [<ffffffff81040a70>] warn_slowpath_null+0x15/0x17
[11496.556506]  [<ffffffffa027e34c>] btrfs_log_inode_parent+0x28e/0x2f1 [btrfs]
[11496.556634]  [<ffffffffa027e443>] btrfs_log_dentry_safe+0x38/0x51 [btrfs]
[11496.556758]  [<ffffffffa025e597>] btrfs_sync_file+0x162/0x1e5 [btrfs]
[11496.556854]  [<ffffffff8114e37d>] vfs_fsync_range+0x18/0x21
[11496.556944]  [<ffffffff8114e39d>] vfs_fsync+0x17/0x19
[11496.557033]  [<ffffffff8114e558>] do_fsync+0x35/0x53
[11496.557125]  [<ffffffff811ef729>] ? lockdep_sys_exit_thunk+0x35/0x67
[11496.557218]  [<ffffffff8114e593>] sys_fsync+0xb/0xf
[11496.557309]  [<ffffffff813ba7a9>] system_call_fastpath+0x16/0x1b
[11496.557400] ---[ end trace 568976af2f674ce7 ]---

And the benchmark will subsequently terminate in exception.  Is there any path towards this problem?

Thanks.

Re: Filebench varmail can not run in btrfs of kernel 3.8.2

[Liu Bo]

On Sat, Jun 22, 2013 at 03:35:23PM +0800, ZHANG, Benlong wrote:
> Hello,
>     When I run filebench varmail test under btrfs of Linux kernel 3.8.2, I got this error:
> 
> [11496.552440] WARNING: at fs/btrfs/tree-log.c:3825 btrfs_log_inode_parent+0x28e/0x2f1 [btrfs]()
> [11496.552560] Hardware name: PowerEdge R910
> [11496.552644] Modules linked in: brd loop dm_crypt mperf coretemp kvm_intel snd_pcm kvm snd_timer snd usb_storage tpm_tis soundcore joydev psmouse snd_page_alloc tpm processor thermal_sys lpc_ich hid_generic serio_raw dcdbas ehci_pci evdev pcspkr tpm_bios microcode mfd_core button ext3 jbd mbcache dm_mod btrfs zlib_deflate crc32c libcrc32c sg sr_mod cdrom ses sd_mod enclosure crc_t10dif ata_generic usbhid hid qla2xxx scsi_transport_fc scsi_tgt crc32c_intel ata_piix uhci_hcd libata ehci_hcd megaraid_sas usbcore scsi_mod usb_common bnx2
> [11496.556105] Pid: 4865, comm: filebench Tainted: G      D W    3.8.2-debug #60
> [11496.556198] Call Trace:
> [11496.556291]  [<ffffffff81040a43>] warn_slowpath_common+0x80/0x98
> [11496.556384]  [<ffffffff81040a70>] warn_slowpath_null+0x15/0x17
> [11496.556506]  [<ffffffffa027e34c>] btrfs_log_inode_parent+0x28e/0x2f1 [btrfs]
> [11496.556634]  [<ffffffffa027e443>] btrfs_log_dentry_safe+0x38/0x51 [btrfs]
> [11496.556758]  [<ffffffffa025e597>] btrfs_sync_file+0x162/0x1e5 [btrfs]
> [11496.556854]  [<ffffffff8114e37d>] vfs_fsync_range+0x18/0x21
> [11496.556944]  [<ffffffff8114e39d>] vfs_fsync+0x17/0x19
> [11496.557033]  [<ffffffff8114e558>] do_fsync+0x35/0x53
> [11496.557125]  [<ffffffff811ef729>] ? lockdep_sys_exit_thunk+0x35/0x67
> [11496.557218]  [<ffffffff8114e593>] sys_fsync+0xb/0xf
> [11496.557309]  [<ffffffff813ba7a9>] system_call_fastpath+0x16/0x1b
> [11496.557400] ---[ end trace 568976af2f674ce7 ]---
> 
> And the benchmark will subsequently terminate in exception.  Is there any path towards this problem?

3.8.2 is quite old, and we've folded a great many fixes upon this part,
so the best bet is moving forward to the latest.

But I guess this warning issues EEXIST.

thanks,
liubo