sys-fs/zfs-kmod seems to be impossible to merge if you have a kernel installed and patched with Reiser4 FS support Suggestion to add to the zfs-kmod ebuild So that it will at the very least fail building while saying what option should not be enabled, probably add some ewarn notes about it, this issue is not easy to spot if you dont know what you are looking for pkg_setup() { # Fails to build if you have reiser4 kernel support patched in kernel linux-info_pkg_setup CONFIG_CHECK="!DEBUG_LOCK_ALLOC + !CONFIG_REISER4_FS EFI_PARTITION With this set and after cleaning up without reiser4 fs kernel support, package will build successfully
pkg_setup() { + # Fails to build if you have reiser4 kernel support patched in kernel linux-info_pkg_setup CONFIG_CHECK="!DEBUG_LOCK_ALLOC + !CONFIG_REISER4_FS EFI_PARTITION
That's correct. ZFS and reiser4 are incompatible to be installed at the same time. Reiser4 is an out of tree kernel module and there are no plans or collaboration happening between the ZoL and Reiser4 teams to guarantee that their filesystems can peacefully coexist within the mainline kernel.
If you need this feature, please open up a bug report with upstream ZoL and see if they want to work with reiser4 team to fix this.
Jonathan, he was asking to express this incompatibility explicitly so that people wouldn't have to figure out why things are failing.
Ah sorry for the misinterpretation. Sure, sounds like a good idea to explicitly add this message. I'll re-open this and add it later.
Exactly was not explicitly using the Reiser4 FS anymore but it was still patched in my kernels, after this i did leave it out, just so that others dont fall in the same trap :)
Thanks Denis. I added the !CONFIG_REISER4_FS check to all ZFS ebuilds. The commit can be found here: https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=df1cc0f5f518b877bc29d7b0fa15456203041d0f
For note, Richard Yao just submitted a patch for this on ZFS on Linux's repo: https://github.com/zfsonlinux/zfs/pull/7021
