Looks like the transaction abort ends up causing the no space, if
that's at all helpful. Lot's of free space seems to be irrelevant.
Any chance this will be getting better soon? Seems to happen to me a
lot these days, and adding space doesn't change anything.
[282713.823416] WARNING: CPU: 4 PID: 3978 at
fs/btrfs/extent-tree.c:6549 __btrfs_free_extent+0x98c/0x9a8 [btrfs]()
[282713.823466] BTRFS: Transaction aborted (error -28)
[282713.823467] Modules linked in: ipmi_si mpt3sas raid_class
scsi_transport_sas dell_rbu nfsv3 nfsv4 nfsd auth_rpcgss oid_registry
nfs_acl nfs lockd grace fscache sunrpc ext2 intel_powerclamp coretemp
crct10dif_pclmul crc32_pclmul sha256_generic hmac drbg aesni_intel
joydev aes_x86_64 glue_helper lrw gf128mul evdev ipmi_devintf iTCO_wdt
ablk_helper cryptd iTCO_vendor_support dcdbas psmouse serio_raw pcspkr
i7core_edac edac_core lpc_ich mfd_core ipmi_msghandler
acpi_power_meter button processor loop autofs4 ext4 crc16 mbcache jbd2
btrfs xor raid6_pq hid_generic usbhid hid sg sd_mod crc32c_intel
uhci_hcd ehci_pci ehci_hcd megaraid_sas ixgbe mdio usbcore ptp
usb_common pps_core scsi_mod bnx2 [last unloaded: ipmi_si]
[282713.823891] CPU: 4 PID: 3978 Comm: btrfs-transacti Tainted: G
I 4.4.3 #1
[282713.823979] 0000000000000006 ffffffff811eba76 ffff8807c4fbbb50
0000000000000009
[282713.824029] ffffffff810442ee ffffffffa0160c9e 00000000ffffffe4
ffff8807c4fbbba8
[282713.824080] ffff88041e0e8000 0000000000000000 ffffffff81044346
ffffffffa01db5aa
[282713.824130] Call Trace:
[282713.824155] [<ffffffff811eba76>] ? dump_stack+0x46/0x59
[282713.824185] [<ffffffff810442ee>] ? warn_slowpath_common+0x94/0xa9
[282713.824222] [<ffffffffa0160c9e>] ? __btrfs_free_extent+0x98c/0x9a8 [btrfs]
[282713.824252] [<ffffffff81044346>] ? warn_slowpath_fmt+0x43/0x4b
[282713.824288] [<ffffffffa0160c9e>] ? __btrfs_free_extent+0x98c/0x9a8 [btrfs]
[282713.824319] [<ffffffff811182d7>] ? __cache_free.isra.49+0x1df/0x1ee
[282713.824358] [<ffffffffa01b124e>] ?
btrfs_merge_delayed_refs+0x59/0x23d [btrfs]
[282713.824412] [<ffffffffa016438b>] ?
__btrfs_run_delayed_refs+0xad5/0xc83 [btrfs]
[282713.824466] [<ffffffffa0165c63>] ?
btrfs_run_delayed_refs+0x6a/0x1a7 [btrfs]
[282713.824519] [<ffffffffa01666ec>] ?
btrfs_write_dirty_block_groups+0xd0/0x219 [btrfs]
[282713.824573] [<ffffffffa01d2e7a>] ? commit_cowonly_roots+0x1dd/0x275 [btrfs]
[282713.824613] [<ffffffffa0176ccd>] ?
btrfs_commit_transaction+0x476/0x924 [btrfs]
[282713.824668] [<ffffffffa017745c>] ? start_transaction+0x2e1/0x46f [btrfs]
[282713.824708] [<ffffffffa0172b53>] ? transaction_kthread+0xde/0x18e [btrfs]
[282713.824749] [<ffffffffa0172a75>] ?
btrfs_cleanup_transaction+0x3ee/0x3ee [btrfs]
[282713.824794] [<ffffffff81059f1a>] ? kthread+0xa7/0xaf
[282713.824820] [<ffffffff81059e73>] ? kthread_parkme+0x16/0x16
[282713.824849] [<ffffffff813c6d5f>] ? ret_from_fork+0x3f/0x70
[282713.824876] [<ffffffff81059e73>] ? kthread_parkme+0x16/0x16
[282713.824902] ---[ end trace 2857e44546172518 ]---
[282713.824946] BTRFS: error (device sdh) in __btrfs_free_extent:6549:
errno=-28 No space left
[282713.824995] BTRFS info (device sdh): forced readonly
[282713.825021] BTRFS: error (device sdh) in
btrfs_run_delayed_refs:2927: errno=-28 No space left
[282713.856362] BTRFS warning (device sdh): Skipping commit of aborted
transaction.
[282713.856413] BTRFS: error (device sdh) in cleanup_transaction:1746:
errno=-28 No space left
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