On Tue, Jan 9, 2018 at 10:10 AM, 林自均 <johnl...@gmail.com> wrote:
> Hi folks, > > I saw the following lines in README: > > > REQUIREMENTS: > > Linux kernel >= 3.13 > > Linux kernel >= 4.2 for unified cgroup hierarchy support > > I guess it means that some part of the whole systemd project requires > Linux kernel 3.13. What if I don't need that part and only pid1 is relevant > to me? Is such information provided somewhere? > There's no full list. You can only check commit logs to find out why the requirement was bumped (git log -p README), but once the new dependency is published, it's always possible that other parts of systemd code will start implicitly depending on *other* kernel features available in that release. For example, here's what prompted each bump: 3.13 - DM_DEFERRED_REMOVE (dcce98a4bdc3) 3.12 - %P in core_pattern (58015d7815bc) 3.11 - arbitrary (a0c3e16b7bce) 3.7 - kernel-based firmware loading (be2ea723b1d0) 3.0 - cgroup.procs (e946948eff51) 2.6.39 - oh come on ~ In short, if it says "REQUIREMENTS: Linux ≥ 3.13", that's what you need to use. Anything below that is at your own risk. -- Mantas Mikulėnas
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