diff options
| author | jasone <jasone@FreeBSD.org> | 2000-09-07 01:33:02 +0000 |
|---|---|---|
| committer | jasone <jasone@FreeBSD.org> | 2000-09-07 01:33:02 +0000 |
| commit | 769e0f974d8929599ba599ac496510fffc90ff34 (patch) | |
| tree | 9387522900085835de81e7830e570ef3f6b3ea80 /sys/kern/kern_threads.c | |
| parent | acf1927de02afda4855ec278b1128fd9446405ea (diff) | |
| download | FreeBSD-src-769e0f974d8929599ba599ac496510fffc90ff34.zip FreeBSD-src-769e0f974d8929599ba599ac496510fffc90ff34.tar.gz | |
Major update to the way synchronization is done in the kernel. Highlights
include:
* Mutual exclusion is used instead of spl*(). See mutex(9). (Note: The
alpha port is still in transition and currently uses both.)
* Per-CPU idle processes.
* Interrupts are run in their own separate kernel threads and can be
preempted (i386 only).
Partially contributed by: BSDi (BSD/OS)
Submissions by (at least): cp, dfr, dillon, grog, jake, jhb, sheldonh
Diffstat (limited to 'sys/kern/kern_threads.c')
| -rw-r--r-- | sys/kern/kern_threads.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sys/kern/kern_threads.c b/sys/kern/kern_threads.c index 3531e2c..ba2b4bf 100644 --- a/sys/kern/kern_threads.c +++ b/sys/kern/kern_threads.c @@ -52,10 +52,13 @@ #include <sys/param.h> #include <sys/systm.h> #include <sys/kernel.h> +#include <sys/ktr.h> #include <sys/proc.h> #include <sys/resourcevar.h> #include <sys/sysproto.h> +#include <machine/mutex.h> + /* * Low level support for sleep/wakeup paradigm * If a timeout is specified: @@ -145,10 +148,12 @@ yield(struct proc *p, struct yield_args *uap) { p->p_retval[0] = 0; s = splhigh(); + mtx_enter(&sched_lock, MTX_SPIN); p->p_priority = MAXPRI; setrunqueue(p); p->p_stats->p_ru.ru_nvcsw++; mi_switch(); + mtx_exit(&sched_lock, MTX_SPIN); splx(s); return(0); |
