Upgrading to New Kernel - Hung on Boot

[APseudoUtopia]

Hey,

I have a FreeBSD 7.0-RELEASE system. I'm trying to upgrade to 7.2,
specifically the RELENG_7_2 tag.

I synced my sources via csup, built world, built kernel, and installed
kernel. All went well. I rebooted into single user mode, and the
kernel hung. The loader menu came up, but when the kernel starts
loading it hangs.

I recovered it by dropping to a loader prompt and loading kernel.old.
It booted up fine.

I have attached the kernel config I used to buildkernel. I'm guessing
it has something to do with this.

In case it's relevant, the system is a dual-core Intel Xeon, with
HyperThreading disabled.

Thanks.
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#
# Kernel configuration file for FreeBSD/i386
#
# An exhaustive list of options and more detailed explanations of the
# device lines is also present in the ../../conf/NOTES and NOTES files.
# If you are in doubt as to the purpose or necessity of a line, check first
# in NOTES.
#

cpu		I686_CPU
ident		KERN

options 	SCHED_ULE		# ULE scheduler
options 	PREEMPTION		# Enable kernel thread preemption
options 	INET			# InterNETworking
options 	FFS			# Berkeley Fast Filesystem
options 	SOFTUPDATES		# Enable FFS soft updates support
#options 	UFS_ACL			# Support for access control lists
#options 	UFS_DIRHASH		# Improve performance on big directories
options 	UFS_GJOURNAL		# Enable gjournal-based UFS journaling
#options 	MD_ROOT			# MD is a potential root device
options 	PROCFS			# Process filesystem (requires PSEUDOFS)
options 	PSEUDOFS		# Pseudo-filesystem framework
options 	GEOM_PART_GPT		# GUID Partition Tables.
options 	GEOM_LABEL		# Provides labelization
options 	COMPAT_43TTY		# BSD 4.3 TTY compat [KEEP THIS!]
options 	SCSI_DELAY=100		# Delay (in ms) before probing SCSI
#options 	KTRACE			# ktrace(1) support
#options 	STACK			# stack(9) support
options 	SYSVSHM			# SYSV-style shared memory
options 	SYSVMSG			# SYSV-style message queues
options 	SYSVSEM			# SYSV-style semaphores
options 	_KPOSIX_PRIORITY_SCHEDULING # POSIX P1003_1B real-time extensions
options 	KBD_INSTALL_CDEV	# install a CDEV entry in /dev
options 	ADAPTIVE_GIANT		# Giant mutex is adaptive.
options 	STOP_NMI		# Stop CPUS using NMI instead of IPI
#options 	AUDIT			# Security event auditing
#options 	KDTRACE_HOOKS		# Kernel DTrace hooks

# SMP
options 	SMP			# Symmetric MultiProcessor Kernel
device		apic			# I/O APIC
options		IPI_PREEMPTION		# Preempt threads running on other CPUs if needed

# Networking
options		DEVICE_POLLING
options		HZ=1000
device		em			# Intel PRO/1000 Gigabit Ethernet Family
device		loop			# Network loopback
device		ether			# Ethernet support
device		tun			# Packet tunnel.
device		bpf			# Berkeley packet filter
device		pf			# OpenBSD's Packet Filter
device		pflog
options		ALTQ
options		ALTQ_RED		# Random Early Detection
options		ALTQ_RIO		# RED In/Out
options		ALTQ_PRIQ		# Priority Queueing
options		ALTQ_NOPCC		# Required for SMP
options		ACCEPT_FILTER_DATA
options		ACCEPT_FILTER_HTTP

# Misc
device		pci			# PCI Bus Support
options		PANIC_REBOOT_WAIT_TIME=-1	# Wait indefinitely after kernel panic

# ATA and ATAPI devices
device		ata
device		atadisk			# ATA disk drives
options 	ATA_STATIC_ID		# Static device numbering

# atkbdc0 controls both the keyboard and the PS/2 mouse
#device		atkbdc			# AT keyboard controller
#device		atkbd			# AT keyboard
#device		kbdmux			# keyboard multiplexer
#device		splash			# Splash screen and screen saver support

# syscons is the default console driver, resembling an SCO console
#device		sc

# Pseudo devices.
device		random			# Entropy device
device		pty			# Pseudo-ttys (telnet etc)