Comment 3 for bug 1706132

Consistent reproducer:

inaddy@iscsixfs:~$ uname -a
Linux iscsixfs 4.4.0-87-generic #110~14.04.1-Ubuntu SMP Tue Jul 18 14:51:32 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

inaddy@iscsixfs:~$ dmesg | grep xfs

[ 381.648984] XFS (sda1): xfs_do_force_shutdown(0x2) called from line 1197 of file /build/linux-lts-xenial-N0BD4p/linux-lts-xenial-4.4.0/fs/xfs/xfs_log.c. Return address = 0xffffffffc02a16a8
[ 381.700064] XFS (sda1): xfs_log_force: error -5 returned.

inaddy@iscsixfs:~$ lsmod | grep xfs
xfs 954368 1
libcrc32c 16384 1 xfs

inaddy@iscsixfs:~$ sudo umount /xfs01
[ 449.785939] sd 2:0:0:1: rejecting I/O to offline device
[ 449.789923] blk_update_request: I/O error, dev sda, sector 0

inaddy@iscsixfs:~$ sudo rmmod xfs
[ 452.928198] =============================================================================
[ 452.929647] BUG xfs_log_ticket (Not tainted): Objects remaining in xfs_log_ticket on kmem_cache_close()
[ 452.931259] -----------------------------------------------------------------------------
[ 452.931259]
[ 452.933002] INFO: Slab 0xffffea0002e67a80 objects=22 used=3 fp=0xffff8800b99eaf18 flags=0xffffc000000080
[ 452.934773] INFO: Object 0xffff8800b99ea000 @offset=0
[ 452.935693] INFO: Object 0xffff8800b99ea228 @offset=552
[ 452.936675] INFO: Object 0xffff8800b99ea2e0 @offset=736
[ 452.937642] kmem_cache_destroy xfs_log_ticket: Slab cache still has objects