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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_shutdown.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_shutdown.c')
| -rw-r--r-- | sys/kern/kern_shutdown.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/sys/kern/kern_shutdown.c b/sys/kern/kern_shutdown.c index 9c744c7..8a6ccd8 100644 --- a/sys/kern/kern_shutdown.c +++ b/sys/kern/kern_shutdown.c @@ -63,6 +63,7 @@ #include <machine/pcb.h> #include <machine/clock.h> +#include <machine/lock.h> #include <machine/md_var.h> #include <machine/smp.h> /* smp_active, cpuid */ @@ -524,6 +525,11 @@ panic(const char *fmt, ...) va_list ap; static char buf[256]; +#ifdef SMP + /* Only 1 CPU can panic at a time */ + s_lock(&panic_lock); +#endif + bootopt = RB_AUTOBOOT | RB_DUMP; if (panicstr) bootopt |= RB_NOSYNC; @@ -537,8 +543,7 @@ panic(const char *fmt, ...) va_end(ap); printf("panic: %s\n", buf); #ifdef SMP - /* three seperate prints in case of an unmapped page and trap */ - printf("mp_lock = %08x; ", mp_lock); + /* two seperate prints in case of an unmapped page and trap */ printf("cpuid = %d; ", cpuid); printf("lapic.id = %08x\n", lapic.id); #endif |
