---
- branch: MAIN
  date: Wed Mar 30 17:02:02 UTC 2022
  files:
  - new: '1.70'
    old: '1.69'
    path: src/sys/kern/kern_softint.c
    pathrev: src/sys/kern/kern_softint.c@1.70
    type: modified
  - new: '1.69'
    old: '1.68'
    path: src/sys/kern/kern_timeout.c
    pathrev: src/sys/kern/kern_timeout.c@1.69
    type: modified
  id: 20220330T170202Z.2f09995ea6260793413fbce041ff048bf6d1809f
  log: |
    kern: Assert softint does not net acquire kernel locks.

    This redoes previous change where I mistakenly used the CPU's biglock
    count, which is not necessarily stable -- the softint lwp may sleep
    on a mutex, and the lwp it interrupted may start up again and release
    the kernel lock, so by the time the softint lwp wakes up again and
    the softint function returns, the CPU may not be holding any kernel
    locks.  But the softint lwp should never hold kernel locks except
    when it's in a (usually, non-MPSAFE) softint function.

    Same with callout.
  module: src
  subject: 'CVS commit: src/sys/kern'
  unixtime: '1648659722'
  user: riastradh