Hello, For those who have received this message twice already, I sincerely apologize. Yesterday I filed an issue in the CentOS bug tracker (#9297[1]) and the Red Hat Bugzilla (#1255512[2]) about OverlayFS with Btrfs as the upper layer. The issue was discovered by a colleague of mine, and we verified the issue exists in the EL7 kernel and mainline kernels (tested on Arch Linux). I additionally verified the problem exists in Fedora kernels. Rather than quoting the issue, I'll just note that the issue is described quite well in the filed bugs noted earlier. In the linked bugs, there's a simple Bash script that will reliably reproduce the problem. While the script uses tmpfs at the lower layer, we originally discovered the problem with ext4 as the lower layer and verified that it doesn't matter which lower layer filesystem it is, the problem exists. Additionally, the problem doesn't exist when using ext4 as the upper layer. I was advised by Josh Boyer to email you guys (and the mailing lists, to be sure to get everyone a chance to look over it) about the problem, since it affects mainline. [1]: https://bugs.centos.org/view.php?id=9297 [2]: https://bugzilla.redhat.com/show_bug.cgi?id=1255512 -- Neal Gompa (FAS: ngompa) -- To unsubscribe from this list: send the line "unsubscribe linux-unionfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
