Comment 8 for bug 1800132

Reviewed: https://review.opendev.org/697257
Committed: https://git.openstack.org/cgit/openstack/kolla-ansible/commit/?id=bebb9bc72332b85a176e8529bbcf4fb24dc2d8fb
Submitter: Zuul
Branch: stable/rocky

commit bebb9bc72332b85a176e8529bbcf4fb24dc2d8fb
Author: Radosław Piliszek <email address hidden>
Date: Fri Nov 29 20:26:16 2019 +0100

    Fix Swift with kernel 4.19 and later

    We mount Swift volumes with xfs.
    The 'nobarrier' option we used was made noop [1]
    and deprecated [2] (with warning) in kernel 4.10.
    In 4.19 it was removed [3] resulting in an error
    when using e.g. Debian Buster as host.
    The noop patch was backported to CentOS 7 so
    it is safe to remove this option with no behavior
    change and backport to where needed.
    Ubuntu Bionic uses 4.15 which only warns.
    CentOS 8 uses 4.18 which only warns as well.
    Debian Buster uses 4.19 exactly which breaks.

    [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2291dab2c9d1880efd19469df2042e2277c8b7a4
    [2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4cf4573d899cd80d8578c050061dc342f99f3a32
    [3] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1c02d502c20809a2a5f71ec16a930a61ed779b81

    Change-Id: I006dea21321146c7fc738d0b41c401b72d271a99
    Closes-bug: #1800132
    (cherry picked from commit 21488710d68450eac4ace21bea4c5f929e0189d4)