On Mon, 2020-11-30 at 17:32 +0100, Sebastian Andrzej Siewior wrote: > On 2020-11-30 17:27:17 [+0100], Mike Galbraith wrote: > > > This just passed. It however killed my git-gc task which wasn't done. > > > Let me try tomorrow with your config. > > > > FYI, I tried 5.9-rt (after fixing 5.9.11), it exploded in the same way, > > so (as expected) it's not some devel tree oopsie. > > v5.9 has the same missing local-lock init due to merged local-lock > upstream. I don't remember when this get_cpu_ptr() came it. Looks like get_cpu_ptr() arrived in 4.14. I patched up zswap/z3fold in my old 5.1-rt tree (old forward port of 4.19-rt), turned them on with a script, and it all worked fine, so the RT zswap allergy lies somewhere upstream of there it seems. If I were to start merging zswap and friends forward, I'd likely eventually meet whatever RT is allergic to. I might try that, but won't be the least surprised if it turns into a god awful mess of dependencies. Hopping forward in rt branches first and patching them up will bracket the little bugger a lot quicker. -Mike
