Em 26-10-2015 18:11, Pierre Labastie escreveu:
> 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).
Yes, good change for all users end developers.
And I left one comment in the ticket.
Thanks again for your deep investigation about these so problematic checks.
--
[]s,
Fernando, aka SÃsifo
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