Comment 0 for bug 1727290

Kernel 4.11.0-1014.14 azure
This test has failed on all the azure instances this cycle, it looks like it has stopped at the "rename-empty-dir" test:

 TEST rename-file.py:110: Rename file over a dir
 ./run --rename /mnt/a/foo108/ /mnt/a/empty108/ -E ENOTDIR
 ./run --rename /mnt/a/foo108/ /mnt/a/dir108/ -E ENOTDIR
 ./run --open-file /mnt/a/foo108/ -r -R :xxx:yyy:zzz -E ENOTDIR
 TEST rename-file.py:121: Rename file over parent dir
 ./run --rename /mnt/a/foo109/ /mnt/a -E ENOTDIR
 ./run --open-file /mnt/a/foo109/ -r -R :xxx:yyy:zzz -E ENOTDIR
 ***
 *** ./run --ov --ts=0 rename-empty-dir
 ***
 TEST rename-empty-dir.py:10: Rename empty dir and rename back
 ./run --rename /mnt/a/empty100 /mnt/a/no_dir100 -E EXDEV
 /mnt/a/empty100: Expected error (Invalid cross-device link) was not produced

Compare to the 4.11.0-1006.6 azure kernel test result [1], it did run through the test:
 08/17 12:25:11 DEBUG| utils:0153| [stdout] ***
 08/17 12:25:11 DEBUG| utils:0153| [stdout] *** ./run --ov --ts=0 rename-empty-dir
 08/17 12:25:11 DEBUG| utils:0153| [stdout] ***
 08/17 12:25:11 DEBUG| utils:0153| [stdout] TEST rename-empty-dir.py:10: Rename empty dir and rename back
 08/17 12:25:11 DEBUG| utils:0153| [stdout] ./run --rename /mnt/a/empty100 /mnt/a/no_dir100 -E EXDEV
 08/17 12:25:11 DEBUG| utils:0153| [stdout] ./run --rename /mnt/a/empty100 /mnt/a/no_dir100 -E EXDEV
 08/17 12:25:11 DEBUG| utils:0153| [stdout] ./run --rename /mnt/a/no_dir100 /mnt/a/empty100 -E ENOENT
 08/17 12:25:11 DEBUG| utils:0153| [stdout] ./run --rename /mnt/a/no_dir100 /mnt/a/empty100 -E ENOENT
 08/17 12:25:11 DEBUG| utils:0153| [stdout] ./run --open-file /mnt/a/empty100 -r -d
 08/17 12:25:11 DEBUG| utils:0153| [stdout] ./run --open-file /mnt/a/no_dir100 -r -d -E ENOENT

BIt's worthy to note that this test was not triggered between 4.11.0-1006.6 and 4.11.0-1014.14

[1] http://kernel.ubuntu.com/testing/4.11.0-1006.6-azure/azure--ubuntu-unionmount-overlayfs-suite--xenial__4.11.0-1006.6__2017-08-17_12-22-00/ubuntu_unionmount_overlayfs_suite/results/ubuntu_unionmount_overlayfs_suite.overlayfs/debug/ubuntu_unionmount_overlayfs_suite.overlayfs.DEBUG.html