CVSROOT: /cvs
Module name: src
Changes by: clau...@cvs.openbsd.org 2024/08/06 02:44:54
Modified files:
sys/kern : kern_event.c kern_exec.c kern_exit.c
kern_fork.c kern_sig.c
sys/sys : event.h proc.h
Log message:
Stop using KERNEL_LOCK to protect the per process kqueue list
Instead of the KERNEL_LOCK use the ps_mtx for most operations.
If the ps_klist is modified an additional global rwlock (kqueue_ps_list_lock)
is required. This includes the knotes with NOTE_FORK and NOTE_EXIT since
in either cases a ps_klist is changed. In the NOTE_FORK | NOTE_TRACK case
the call to kqueue_register() can sleep this is why a global rwlock is used.
Adjust the reaper() to call knote_processexit() without KERNEL_LOCK.
Double lock idea from visa@
OK mvs@
