[CentOS-virt] Xen-kernel: Update to 4.14 or 4.19?
karljohnson.it at gmail.com
Thu Mar 7 18:55:39 UTC 2019
On Thu, Mar 7, 2019 at 1:42 PM Sarah Newman <srn at prgmr.com> wrote:
> On 3/7/19 10:30 AM, Akemi Yagi wrote:
> > On Thu, Mar 7, 2019 at 9:42 AM George Dunlap <dunlapg at umich.edu> wrote:
> >> Hey all,
> >> We've been on 4.9 for some time now, and while it's still supported, I
> >> think it's time to start thinking about upgrading, and I'd like input
> >> from the community about which version to move up to.
> >> 4.19 has been out for almost 5 months now. It will include PVH domU
> >> support, and PVH dom0 support in what _is believed_ to be the final
> >> form; so when the Virt SIG moves to a version of Xen that supports PVH
> >> dom0, the kernel will already be in place with no need to upgrade.
> >> The other option would be to move to 4.14: Probably more stable (as
> >> it's been out for over a year now), but doesn't have either PVH domU
> >> or PVH dom0 support.
> >> I'd suggest 4.19. Any other opinions?
> >> -George
> > You may also want to consider each version's EOL:
> > 4.9 Jan, 2023
> > 4.14 Jan, 2020
> > 4.19 Dec, 2020
> Regardless of EOL date, I think it's worth trying to upgrade when Xen has
> stable PVH dom0 support.
> I am pretty sure historically that there have been difficulties
> backporting some of the side channel mitigations as they can be quite
> invasive. That
> may be another reason to upgrade sooner rather than later.
+1 for 4.19. However, this version requires a recent GCC version so it wont
build at least for el6 on the CBS. We would have to build them with recent
GCC from devtoolset like I do in my pull request (gcc 7.3.1).
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