On Tue, Nov 29, 2022 at 10:22:42PM -1000, Tejun Heo wrote: > Rolling out kernel upgrades is a slow and iterative process. At a large scale > it can take months to roll a new kernel out to a fleet of servers. While this > latency is expected and inevitable for normal kernel upgrades, it can become > highly problematic when kernel changes are required to fix bugs. Livepatch [9] > is available to quickly roll out critical security fixes to large fleets, but > the scope of changes that can be applied with livepatching is fairly limited, > and would likely not be usable for patching scheduling policies. With > sched_ext, new scheduling policies can be rapidly rolled out to production > environments. I don't think we can or should use this argument to push BPF into ever more places.
