On Tue, 12 Jan 2021, Jann Horn wrote: > [This is not something I intend to work on myself. But since I > stumbled over this issue, I figured I should at least document/report > it, in case anyone is willing to pick it up.] Well yeah all true. There is however a slabinfo tool that has an -s option to shrink all slabs. slabinfo -s So you could put that somewhere that executes if the system is idle or put it into cron or so. This is a heavy handed operation through. You could switch off partial cpu slabs completely to avoid the issue. Nothing came to mind in the past on how to solve this without sacrificing significant performance or cause some system processing at random times while the shrinking runs. No one wants any of that. Being able to do it from userspace cleanly shifts the burden to userspace ;-) You can even do random heavy system processing from user space if you put a sleep there for random seconds between the shrinking runs.
