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

6 files changed, 20 insertions, 2 deletions

diff --git a/sys/conf/files b/sys/conf/files
index 7b086d4..70ea3a5 100644
--- a/sys/conf/files
+++ b/sys/conf/files
@@ -433,9 +433,11 @@ kern/kern_event.c	standard
 kern/kern_exec.c	standard
 kern/kern_exit.c	standard
 kern/kern_fork.c	standard
+kern/kern_idle.c	standard
 kern/kern_intr.c	standard
 kern/kern_jail.c	standard
 kern/kern_kthread.c	standard
+kern/kern_ktr.c		optional ktr
 kern/kern_ktrace.c	standard
 kern/kern_linker.c	standard
 kern/kern_lock.c	standard
@@ -443,6 +445,7 @@ kern/kern_lockf.c	standard
 kern/kern_malloc.c	standard
 kern/kern_mib.c		standard
 kern/kern_module.c	standard
+kern/kern_mutex.c	standard
 kern/kern_ntptime.c	standard
 kern/kern_physio.c	standard
 kern/kern_proc.c	standard
diff --git a/sys/conf/files.alpha b/sys/conf/files.alpha
index bb746e1..6e8ba94 100644
--- a/sys/conf/files.alpha
+++ b/sys/conf/files.alpha
@@ -67,6 +67,7 @@ alpha/alpha/perfmon.c		optional	perfmon	profiling-routine
 alpha/alpha/perfmon.c		optional	perfmon
 alpha/alpha/pmap.c		standard
 alpha/alpha/procfs_machdep.c	standard
+alpha/alpha/mp_machdep.c	standard
 alpha/alpha/prom.c		standard
 alpha/alpha/promcons.c		standard
 alpha/alpha/prom_disp.s		standard
@@ -75,6 +76,7 @@ alpha/alpha/simplelock.s	optional	smp
 alpha/alpha/support.s		standard
 alpha/alpha/swtch.s		standard
 alpha/alpha/sys_machdep.c	standard
+alpha/alpha/synch_machdep.c	standard
 alpha/alpha/trap.c		standard
 alpha/alpha/userconfig.c	optional	userconfig
 alpha/alpha/vm_machdep.c	standard
diff --git a/sys/conf/files.i386 b/sys/conf/files.i386
index f5fa25a..e9a7acd 100644
--- a/sys/conf/files.i386
+++ b/sys/conf/files.i386
@@ -188,7 +188,6 @@ i386/i386/mp_clock.c		optional	smp
 i386/i386/mp_machdep.c		optional	smp
 i386/i386/mpapic.c		optional	smp
 i386/i386/mpboot.s		optional	smp
-i386/i386/mplock.s		optional	smp
 i386/i386/nexus.c		standard
 i386/i386/perfmon.c		optional	perfmon
 i386/i386/perfmon.c		optional	perfmon	profiling-routine
@@ -198,6 +197,7 @@ i386/i386/simplelock.s		optional	smp
 i386/i386/support.s		standard
 i386/i386/swtch.s		standard
 i386/i386/sys_machdep.c		standard
+i386/i386/synch_machdep.c	standard
 i386/i386/trap.c		standard
 i386/i386/userconfig.c		optional	userconfig
 i386/i386/vm86.c		standard
@@ -242,6 +242,7 @@ i386/isa/if_wi.c		optional	wi card
 i386/isa/if_wl.c		count		wl
 i386/isa/if_wlp.c		optional	wlp
 i386/isa/intr_machdep.c		standard
+i386/isa/ithread.c		standard
 i386/isa/ipl_funcs.c		standard				\
 	compile-with	"${CC} -c ${CFLAGS} ${DEFINED_PROF:S/^$/-fomit-frame-pointer/} ${.IMPSRC}"
 i386/isa/isa.c			optional	isa
diff --git a/sys/conf/files.pc98 b/sys/conf/files.pc98
index bcb6773..2e8481e 100644
--- a/sys/conf/files.pc98
+++ b/sys/conf/files.pc98
@@ -175,7 +175,6 @@ i386/i386/mp_clock.c		optional	smp
 i386/i386/mp_machdep.c		optional	smp
 i386/i386/mpapic.c		optional	smp
 i386/i386/mpboot.s		optional	smp
-i386/i386/mplock.s		optional	smp
 i386/i386/nexus.c		standard
 i386/i386/perfmon.c		optional	perfmon
 i386/i386/perfmon.c		optional	perfmon	profiling-routine
diff --git a/sys/conf/options b/sys/conf/options
index ddd04a3..8093240 100644
--- a/sys/conf/options
+++ b/sys/conf/options
@@ -454,6 +454,15 @@ PCFCLOCK_VERBOSE	opt_pcfclock.h
 PCFCLOCK_MAX_RETRIES	opt_pcfclock.h
 TDFX_LINUX opt_tdfx.h
 
+KTR			opt_global.h
+KTR_MASK		opt_global.h
+KTR_CPUMASK		opt_global.h
+KTR_COMPILE		opt_global.h
+KTR_ENTRIES		opt_global.h
+KTR_EXTEND		opt_global.h
+SMP_DEBUG		opt_global.h
+WITNESS			opt_global.h
+
 # options for ACPI support
 ACPI_DEBUG		opt_acpi.h
 AML_DEBUG		opt_acpi.h
diff --git a/sys/conf/options.alpha b/sys/conf/options.alpha
index 8260cb0..7d53c37 100644
--- a/sys/conf/options.alpha
+++ b/sys/conf/options.alpha
@@ -64,3 +64,7 @@ KBD_MAXRETRY		opt_kbd.h
 KBD_MAXWAIT		opt_kbd.h
 KBD_RESETDELAY		opt_kbd.h
 KBDIO_DEBUG		opt_kbd.h
+
+# Clock options
+CLK_USE_I8254_CALIBRATION	opt_clock.h
+TIMER_FREQ			opt_clock.h