On Thu, Nov 30, 2023 at 08:47:33PM -0500, Daniel J Blueman wrote: > Hi Kent et al, > > On upstream bcachefs (master @ evilpiepirate.org/git/bcachefs.git) SHA > f8a1ba26, I was able to develop a minimal reproducer [1] for a page > not present oops I can provoke [2]. It appears we need further > synchronisation during unmount. > > Let me know when there is a patch I can test, or for debug.
There was a device removal that was just fixed, I've already sent the pull request to Linus but in the meantime try this branch: https://evilpiepirate.org/git/bcachefs.git/log/?h=bcachefs-for-upstream If you still hit it, I'll turn your reproducer into a ktest test and hunt it down.
