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
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atpic_vector.S
clock.c
icu_ipl.s
icu_ipl.S
icu_vector.s
icu_vector.S
icu.h
intr_machdep.c	Add ACPI S2-S4BIOS Suspend/Resume code.	2001-07-20 06:07:34 +00:00
intr_machdep.h	Add ACPI S2-S4BIOS Suspend/Resume code.	2001-07-20 06:07:34 +00:00
isa_dma.c
isa_dma.h
isa.c
isa.h
ithread.c
nmi.c	Add ACPI S2-S4BIOS Suspend/Resume code.	2001-07-20 06:07:34 +00:00
npx.c	- Close races with signals and other AST's being triggered while we are in	2001-08-10 22:53:32 +00:00
timerreg.h
vector.s
vector.S