As noted in ticket #6931, one test (test/shell/lvcreate-large-raid.sh) hangs
forever and may even trash the system, which then needs a hard reboot.
I've found the explanation, but really upstream is too "fedora-centric" (see
below why). In file test/lib/aux, there is this function (look at the 4 line
long comment):
----------------
have_raid() {
test "$RAID" = shared -o "$RAID" = internal || {
echo "Raid is not built-in." >&2
return 1;
}
target_at_least dm-raid "$@"
# some kernels have broken mdraid bitmaps, don't use them!
# may oops kernel, we know for sure all FC24 are currently broken
# in general any 4.1, 4.2 is likely useless unless patched
# hopefully 4.3 will be patched
case "$(uname -r)" in
4.[123].*fc24*) return 1 ;;
esac
---------------
The comment shows that mdraid is broken in kernels version 4.1 and 4.2, but
then, only fc24 kernels lead to non zero exit! Note that according to the
comment, any test using raid could be hanging too. I've only observed that for
one test.
Anyway, I tried linux-4.0.9 and linux-4.3-rc7, and the test passes on both.
Looks like 4.3 has been patched.
I'll change the book to warn against versions 4.1 and 4.2 of the kernel (in
both LVM and mdadm).
Pierre
--
http://lists.linuxfromscratch.org/listinfo/blfs-dev
FAQ: http://www.linuxfromscratch.org/blfs/faq.html
Unsubscribe: See the above information page
