Hi Franziska,

(2014/06/27 14:00), Franziska Näpelt wrote:
Hi!

After about 12 hours of booting, the system runs now

Congratulations!

The fifth harddrive is still in the btrfs-pool.

Here is the log from the crash, while the btrfs delete job runs:

Jun 25 20:34:59 hsad-srv-03 kernel: [614028.957248] ------------[ cut
here ]------------
Jun 25 20:34:59 hsad-srv-03 kernel: [614028.957268] WARNING: CPU: 3 PID:
31131 at fs/btrfs/super.c:259 __btrfs_abort_transaction+0x46/0xf8 [
btrfs]()
Jun 25 20:34:59 hsad-srv-03 kernel: [614028.957270] Modules linked in:
xts gf128mul tun parport_pc ppdev lp parport bnep rfcomm bluetooth rf
kill pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) cpufreq_powersave
cpufreq_userspace cpufreq_stats cpufreq_conservative vboxdrv(O) binfm
t_misc fuse nfsd auth_rpcgss oid_registry nfs_acl nfs lockd fscache
sunrpc ext2 dm_crypt hwmon_vid loop firewire_sbp2 snd_hda_codec_hdmi snd
_hda_intel joydev radeon ttm drm_kms_helper iTCO_wdt iTCO_vendor_support
snd_hda_controller drm i2c_algo_bit snd_hda_codec snd_hwdep snd_pcm
  i7core_edac snd_timer edac_core snd soundcore psmouse acpi_cpufreq
coretemp processor kvm_intel kvm microcode lpc_ich mfd_core pcspkr asus_
atk0110 ehci_pci mxm_wmi i2c_i801 i2c_core wmi serio_raw thermal_sys
evdev button ext4 crc16 jbd2 mbcache btrfs xor raid6_pq dm_mod raid1 md
_mod sg sd_mod crct10dif_generic crc_t10dif crct10dif_common hid_generic
usbhid hid crc32c_intel firewire_ohci r8169 firewire_core mii crc_i
tu_t sata_sil ahci libahci sata_mv uhci_hcd ehci_hcd
Jun 25 20:34:59 hsad-srv-03 kernel: libata xhci_hcd scsi_mod usbcore
usb_common
Jun 25 20:34:59 hsad-srv-03 kernel: [614028.957309] CPU: 3 PID: 31131
Comm: find Tainted: G           O  3.15.0 #1
Jun 25 20:34:59 hsad-srv-03 kernel: [614028.957310] Hardware name:
System manufacturer System Product Name/SABERTOOTH X58, BIOS 1304
08/02/2011
Jun 25 20:34:59 hsad-srv-03 kernel: [614028.957311]  0000000000000000
0000000000000009 ffffffff8138b54a ffff880001593b58
Jun 25 20:34:59 hsad-srv-03 kernel: [614028.957313]  ffffffff81039583
0000000000000000 ffffffffa01c8123 00000000000000b0
Jun 25 20:34:59 hsad-srv-03 kernel: [614028.957315]  00000000ffffffe4
ffff880625fb9000 ffff8801077e8e80 ffffffffa0247ac0
Jun 25 20:34:59 hsad-srv-03 kernel: [614028.957317] Call Trace:
Jun 25 20:34:59 hsad-srv-03 kernel: [614028.957321]
[<ffffffff8138b54a>] ? dump_stack+0x41/0x51
Jun 25 20:34:59 hsad-srv-03 kernel: [614028.957324]
[<ffffffff81039583>] ? warn_slowpath_common+0x78/0x90
Jun 25 20:34:59 hsad-srv-03 kernel: [614028.957331]
[<ffffffffa01c8123>] ? __btrfs_abort_transaction+0x46/0xf8 [btrfs]
Jun 25 20:34:59 hsad-srv-03 kernel: [614028.957333]
[<ffffffff81039633>] ? warn_slowpath_fmt+0x45/0x4a
Jun 25 20:34:59 hsad-srv-03 kernel: [614028.957340]
[<ffffffffa01c8123>] ? __btrfs_abort_transaction+0x46/0xf8 [btrfs]
Jun 25 20:34:59 hsad-srv-03 kernel: [614028.957348]
[<ffffffffa01d648a>] ? __btrfs_free_extent+0x80a/0x84d [btrfs]
Jun 25 20:34:59 hsad-srv-03 kernel: [614028.957351]
[<ffffffff8138db1c>] ? mutex_trylock+0x10/0x29
Jun 25 20:34:59 hsad-srv-03 kernel: [614028.957359]
[<ffffffffa01dabfe>] ? __btrfs_run_delayed_refs+0xae4/0xc2b [btrfs]
Jun 25 20:34:59 hsad-srv-03 kernel: [614028.957368]
[<ffffffffa01dc86c>] ? btrfs_run_delayed_refs+0x7b/0x17e [btrfs]
Jun 25 20:34:59 hsad-srv-03 kernel: [614028.957378]
[<ffffffffa01ea1d7>] ? __btrfs_end_transaction+0xe5/0x2c0 [btrfs]
Jun 25 20:34:59 hsad-srv-03 kernel: [614028.957389]
[<ffffffffa01ee9bb>] ? btrfs_dirty_inode+0x8c/0xa7 [btrfs]
Jun 25 20:34:59 hsad-srv-03 kernel: [614028.957391]
[<ffffffff8111f12d>] ? touch_atime+0xe3/0x11c
Jun 25 20:34:59 hsad-srv-03 kernel: [614028.957393]
[<ffffffff81119843>] ? iterate_dir+0x7c/0xa2
Jun 25 20:34:59 hsad-srv-03 kernel: [614028.957395]
[<ffffffff81119949>] ? SyS_getdents+0x74/0xca
Jun 25 20:34:59 hsad-srv-03 kernel: [614028.957397]
[<ffffffff811196ee>] ? filldir64+0xdd/0xdd
Jun 25 20:34:59 hsad-srv-03 kernel: [614028.957399]
[<ffffffff81394522>] ? system_call_fastpath+0x16/0x1b
Jun 25 20:34:59 hsad-srv-03 kernel: [614028.957400] ---[ end trace
8392ac15dafb7de4 ]---
Jun 25 20:34:59 hsad-srv-03 kernel: [614028.957422] BTRFS info (device
sdh): forced readonly

Your delete job seemed to fail at __btrfs_abort_transaction(),
resulted in readonly remount at that time.

In addition, if you encounter this kind of situation, setting
skip_balance mount option would help you. It skips to continue
balance at mount time. Please see also the following thread.

It's about the case which Marc tried to balance btrfs and
hanup happened.

http://comments.gmane.org/gmane.comp.file-systems.btrfs/35791

Thanks,
Satoru



After that event, there are furher entries in the messages log, but
nothing interesting, only some dhcp infos. Three minutes later, the log
stopped without any message.

Does someone need further logs?

I have no idea.

Thanks,
Satoru


best regards,
Franziska


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