Balance fails due to ENOSPC on 5.11.0-rc2+.
[ 2460.219094] BTRFS info (device sdb6): balance: start -f
-dconvert=single -mconvert=single -sconvert=single
[ 2460.219224] BTRFS info (device sdb6): relocating block group
194572713984 flags data
[ 2460.241299] ------------[ cut here ]------------
[ 2460.241302] BTRFS: Transaction aborted (error -28)
[ 2460.241328] WARNING: CPU: 3 PID: 4135 at fs/btrfs/volumes.c:3003
btrfs_remove_chunk+0x60e/0x6c0 [btrfs]
::
[ 2460.241447] RIP: 0010:btrfs_remove_chunk+0x60e/0x6c0 [btrfs]
::
[ 2460.241497] Call Trace:
[ 2460.241500] btrfs_relocate_chunk+0x9d/0xd0 [btrfs]
[ 2460.241533] __btrfs_balance+0x413/0xa30 [btrfs]
[ 2460.241566] btrfs_balance+0x436/0x4d0 [btrfs]
[ 2460.241597] btrfs_ioctl_balance+0x2d5/0x380 [btrfs]
[ 2460.241647] btrfs_ioctl+0x565/0x22b0 [btrfs]
[ 2460.241693] ? selinux_file_ioctl+0x174/0x220
[ 2460.241698] ? handle_mm_fault+0xd7/0x2b0
[ 2460.241702] __x64_sys_ioctl+0x91/0xc0
[ 2460.241705] ? __x64_sys_ioctl+0x91/0xc0
[ 2460.241707] do_syscall_64+0x38/0x50
[ 2460.241711] entry_SYSCALL_64_after_hwframe+0x44/0xa9
::
[ 2460.241735] ---[ end trace 95b8b7b84503a477 ]---
[ 2460.241738] BTRFS: error (device sdb6) in btrfs_remove_chunk:3003:
errno=-28 No space left
[ 2460.241743] BTRFS info (device sdb6): forced readonly
[ 2460.242646] BTRFS info (device sdb6): 1 enospc errors during balance
[ 2460.242649] BTRFS info (device sdb6): balance: ended with status: -30
btrfs fi us /Volumes/
Overall:
Device size: 154.97GiB
Device allocated: 154.97GiB
Device unallocated: 2.00MiB
Device missing: 0.00B
Used: 147.91GiB
Free (estimated): 2.75GiB (min: 2.75GiB)
Data ratio: 1.99
Metadata ratio: 1.52
Global reserve: 183.72MiB (used: 0.00B)
Data,single: Size:894.00MiB, Used:0.00B (0.00%)
/dev/sdb6 894.00MiB
Data,RAID1: Size:75.53GiB, Used:73.23GiB (96.96%)
/dev/sdb6 75.53GiB
/dev/sdc2 75.53GiB
Metadata,single: Size:964.00MiB, Used:0.00B (0.00%)
/dev/sdb6 964.00MiB
Metadata,RAID1: Size:1.00GiB, Used:737.25MiB (72.00%)
/dev/sdb6 1.00GiB
/dev/sdc2 1.00GiB
System,single: Size:32.00MiB, Used:0.00B (0.00%)
/dev/sdb6 32.00MiB
System,RAID1: Size:32.00MiB, Used:16.00KiB (0.05%)
/dev/sdb6 32.00MiB
/dev/sdc2 32.00MiB
Unallocated:
/dev/sdb6 1.00MiB
/dev/sdc2 1.00MiB
