loop2: rw=536871000, want=41568, limit=16894 BTRFS error (device loop2): bdev /dev/loop2 errs: wr 1, rd 0, flush 0, corrupt 0, gen 0 BTRFS: error (device loop2) in btrfs_commit_transaction:2227: errno=-5 IO failure (Error while writing out transaction) BTRFS warning (device loop2): Skipping commit of aborted transaction. ------------[ cut here ]------------ WARNING: CPU: 1 PID: 30745 at fs/btrfs/transaction.c:1850 cleanup_transaction+0x162/0x1a0 fs/btrfs/transaction.c:1850 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 30745 Comm: btrfs-transacti Not tainted 4.9.94-g8683408 #1 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801b5e4f900 ffffffff81eb0aa9 ffffffff83a484a0 00000000ffffffff 0000000000000000 0000000000000001 000000000000073a ffff8801b5e4f9c0 ffffffff8141f845 0000000041b58ab3 ffffffff841b7b48 ffffffff8141f686 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] panic+0x1bf/0x3bc kernel/panic.c:179 [] __warn.cold.9+0xc1/0x17f kernel/panic.c:542 [] warn_slowpath_fmt+0xc2/0x100 kernel/panic.c:565 [] cleanup_transaction+0x162/0x1a0 fs/btrfs/transaction.c:1850 [] btrfs_commit_transaction+0x1d33/0x2d00 fs/btrfs/transaction.c:2296 [] transaction_kthread+0x4a5/0x620 fs/btrfs/disk-io.c:1997 [] kthread+0x26d/0x300 kernel/kthread.c:211 [] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..