CVSROOT: /cvs
Module name: src
Changes by: m...@cvs.openbsd.org 2017/11/04 08:13:53
Modified files:
sys/kern : kern_event.c uipc_socket.c
sys/miscfs/fifofs: fifo_vnops.c
sys/sys : event.h socketvar.h
Log message:
Make it possible for multiple threads to enter kqueue_scan() in parallel.
This is a requirement to use a sleeping lock inside kqueue filters.
It is now possible, but not recommended, to sleep inside ``f_event''.
Threads iterating over the list of pending events are now recognizing
and skipping other threads' markers. knote_acquire() and knote_release()
must be used to "own" a knote to make sure no other thread is sleeping
with a reference on it.
Acquire and marker logic taken from DragonFly but the KERNEL_LOCK()
is still serializing the execution of the kqueue code.
This also enable the NET_LOCK() in socket filters.
Tested by abieber@ & juanfra@, run by naddy@ in a bulk, ok visa@, bluhm@
