John Baldwin 688ebe120c - Close races with signals and other AST's being triggered while we are in ... the process of exiting the kernel. The ast() function now loops as long as the PS_ASTPENDING or PS_NEEDRESCHED flags are set. It returns with preemption disabled so that any further AST's that arrive via an interrupt will be delayed until the low-level MD code returns to user mode. - Use u_int's to store the tick counts for profiling purposes so that we do not need sched_lock just to read p_sticks. This also closes a problem where the call to addupc_task() could screw up the arithmetic due to non-atomic reads of p_sticks. - Axe need_proftick(), aston(), astoff(), astpending(), need_resched(), clear_resched(), and resched_wanted() in favor of direct bit operations on p_sflag. - Fix up locking with sched_lock some. In addupc_intr(), use sched_lock to ensure pr_addr and pr_ticks are updated atomically with setting PS_OWEUPC. In ast() we clear pr_ticks atomically with clearing PS_OWEUPC. We also do not grab the lock just to test a flag. - Simplify the handling of Giant in ast() slightly. Reviewed by: bde (mostly)		2001-08-10 22:53:32 +00:00
..
aio.h
ksched.c	- Close races with signals and other AST's being triggered while we are in	2001-08-10 22:53:32 +00:00
mqueue.h
p1003_1b.c	o Replace calls to p_can(..., P_CAN_xxx) with calls to p_canxxx().	2001-07-05 17:10:46 +00:00
posix4_mib.c	Add $FreeBSD$.	2000-04-22 15:13:06 +00:00
posix4.h
sched.h
semaphore.h	Track libc_r addition of semaphores implementation.	2000-01-20 07:55:42 +00:00