On Tue, 8 Apr 2025 20:18:26 +0200 Matthieu Baerts wrote: > On 02/04/2025 19:23, Stanislav Fomichev wrote: > > Recent change [0] resulted in a "BUG: using __this_cpu_read() in > > preemptible" splat [1]. PREEMPT kernels have additional requirements > > on what can and can not run with/without preemption enabled. > > Expose those constrains in the debug kernels. > > Good idea to suggest this to find more bugs! > > I did some quick tests on my side with our CI, and the MPTCP selftests > seem to take a bit more time, but without impacting the results. > Hopefully, there will be no impact in slower/busy environments :)
What kind of slow down do you see? I think we get up to 50% more time spent in the longer tests. Not sure how bad is too bad.. I'm leaning towards applying this to net-next and we can see if people running on linux-next complain? Let me CC kselftests, patch in question: https://lore.kernel.org/all/20250402172305.1775226-1-...@fomichev.me/
