Comment # 6 on bug 957052 from Srinidhi B S

I'm still seeing the crash! :(

# uname -r
3.16.7-116.gdca8990-desktop

# dmesg
...
[103019.303858] ------------[ cut here ]------------
[103019.303882] WARNING: CPU: 3 PID: 28239 at ../fs/btrfs/super.c:259
__btrfs_abort_transaction+0x4b/0x110 [btrfs]()
[103019.303883] BTRFS: Transaction aborted (error -17)
[103019.303884] Modules linked in: ppdev parport_pc lp parport uinput tun ctr
ccm rfcomm fuse af_packet vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O)
bnep xfs libcrc32c ecb btusb bluetooth 6lowpan_iphc uvcvideo videobuf2_vmalloc
videobuf2_memops videobuf2_core v4l2_common videodev rtsx_pci_ms rtsx_pci_sdmmc
mmc_core iTCO_wdt memstick iTCO_vendor_support arc4 snd_hda_codec_realtek
snd_hda_codec_generic snd_hda_codec_hdmi x86_pkg_temp_thermal intel_powerclamp
coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel
aesni_intel aes_x86_64 lrw gf128mul glue_helper iwlmvm snd_hda_intel
snd_hda_controller ablk_helper snd_hda_codec cryptd mac80211 snd_hwdep snd_pcm
snd_timer iwlwifi tpm_tis thinkpad_acpi cfg80211 tpm ac rfkill joydev snd
e1000e mei_me ptp mei lpc_ich rtsx_pci pps_core mfd_core
[103019.303906]  thermal soundcore serio_raw processor i2c_i801 shpchp pcspkr
wmi battery intel_smartconnect dm_mod hid_logitech_dj btrfs xor raid6_pq
crc32c_intel xhci_hcd i915 i2c_algo_bit drm_kms_helper drm video button sg
[103019.303916] CPU: 3 PID: 28239 Comm: snapperd Tainted: G           O 
3.16.7-116.gdca8990-desktop #1
[103019.303917] Hardware name: LENOVO 20ARS16H00/20ARS16H00, BIOS GJET84WW
(2.34 ) 06/22/2015
[103019.303918]  0000000000000009 ffffffff8161d46f ffff88011a9cba88
ffffffff8105cae7
[103019.303919]  00000000ffffffef ffff88011a9cbad8 ffff8801e2986de0
ffffffffa02bb090
[103019.303921]  0000000000000513 ffffffff8105cb4c ffffffffa02bf350
ffffffff00000020
[103019.303922] Call Trace:
[103019.303930]  [<ffffffff810051ee>] dump_trace+0x8e/0x350
[103019.303933]  [<ffffffff81005556>] show_stack_log_lvl+0xa6/0x190
[103019.303935]  [<ffffffff81006aa1>] show_stack+0x21/0x50
[103019.303939]  [<ffffffff8161d46f>] dump_stack+0x49/0x6a
[103019.303943]  [<ffffffff8105cae7>] warn_slowpath_common+0x77/0x90
[103019.303945]  [<ffffffff8105cb4c>] warn_slowpath_fmt+0x4c/0x50
[103019.303951]  [<ffffffffa02140cb>] __btrfs_abort_transaction+0x4b/0x110
[btrfs]
[103019.303965]  [<ffffffffa0240848>] create_pending_snapshot+0x578/0x960
[btrfs]
[103019.303989]  [<ffffffffa0240cb9>] create_pending_snapshots+0x89/0xb0
[btrfs]
[103019.304012]  [<ffffffffa0242b3c>]
btrfs_commit_transaction.part.21+0x3ec/0x9f0 [btrfs]
[103019.304040]  [<ffffffffa02759d3>] btrfs_mksubvol.isra.29+0x553/0x5a0
[btrfs]
[103019.304082]  [<ffffffffa0275bb1>]
btrfs_ioctl_snap_create_transid+0x191/0x1a0 [btrfs]
[103019.304143]  [<ffffffffa0275d21>] btrfs_ioctl_snap_create_v2+0xf1/0x160
[btrfs]
[103019.304188]  [<ffffffffa0277def>] btrfs_ioctl+0xcaf/0x2b20 [btrfs]
[103019.304229]  [<ffffffff811caff7>] do_vfs_ioctl+0x2e7/0x4c0
[103019.304235]  [<ffffffff811cb251>] SyS_ioctl+0x81/0xa0
[103019.304238]  [<ffffffff8162414d>] system_call_fastpath+0x1a/0x1f
[103019.304242]  [<00007f3f4c413ba7>] 0x7f3f4c413ba6
[103019.304244] ---[ end trace 2d2398d9c684ec3a ]---
[103019.304246] BTRFS: error (device sdb1) in create_pending_snapshot:1299:
errno=-17 Object already exists
[103019.304248] BTRFS info (device sdb1): forced readonly
[103019.304249] BTRFS warning (device sdb1): Skipping commit of aborted
transaction.
[103019.304251] BTRFS: error (device sdb1) in cleanup_transaction:1577:
errno=-17 Object already exists