CVSROOT: /cvs
Module name: src
Changes by: bl...@cvs.openbsd.org 2024/01/06 03:58:45
Modified files:
sys/net : if.c
sys/netinet : in.c
Log message:
Take net lock before kernel lock.
Doing KERNEL_LOCK() just before NET_LOCK() does not make sense.
Net lock is a rwlock that releases kernel lock during sleep. To
avoid an unnecessary release and take kernel lock cycle, move
KERNEL_LOCK() after NET_LOCK().
There is no lock order reversal deadlock issue. Both locks are
used in any order thoughout the kernel. As NET_LOCK() releases the
kernel lock when it cannot take the lock immediately and has to
sleep, we always end in the order kernel lock before net lock after
sleeping.
OK sashan@
