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| 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_subr.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_subr.c')
| -rw-r--r-- | sys/kern/kern_subr.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/sys/kern/kern_subr.c b/sys/kern/kern_subr.c index c0f7f64..d9a599a 100644 --- a/sys/kern/kern_subr.c +++ b/sys/kern/kern_subr.c @@ -42,6 +42,7 @@ #include <sys/param.h> #include <sys/systm.h> #include <sys/kernel.h> +#include <sys/ktr.h> #include <sys/proc.h> #include <sys/malloc.h> #include <sys/lock.h> @@ -52,6 +53,8 @@ #include <vm/vm_page.h> #include <vm/vm_map.h> +#include <machine/mutex.h> + static void uio_yield __P((void)); int @@ -421,10 +424,12 @@ uio_yield() int s; p = curproc; - p->p_priority = p->p_usrpri; s = splhigh(); + mtx_enter(&sched_lock, MTX_SPIN); + p->p_priority = p->p_usrpri; setrunqueue(p); p->p_stats->p_ru.ru_nivcsw++; mi_switch(); + mtx_exit(&sched_lock, MTX_SPIN); splx(s); } |
