Index: head/sys/mips/conf/std.AR933X
===================================================================
--- head/sys/mips/conf/std.AR933X	(revision 310129)
+++ head/sys/mips/conf/std.AR933X	(revision 310130)
@@ -1,131 +1,133 @@
 #
 # AR91XX -- Kernel configuration base file for the Atheros AR913x SoC.
 #
 # This file (and the hints file accompanying it) are not designed to be
 # used by themselves. Instead, users of this file should create a kernel
 # config file which includes this file (which gets the basic hints), then
 # override the default options (adding devices as needed) and adding
 # hints as needed (for example, the GPIO and LAN PHY.)
 #
 # $FreeBSD$
 #
 
 machine         mips mips
 #ident		std.AR933X
 cpu		CPU_MIPS24K
 makeoptions	KERNLOADADDR=0x80050000
 options 	HZ=1000
 
 files		"../atheros/files.ar71xx"
 hints		"AR933X_BASE.hints"
 
 makeoptions	DEBUG=-g		#Build kernel with gdb(1) debug symbols
 makeoptions	MODULES_OVERRIDE="gpio ar71xx if_gif if_vlan if_gre if_tap if_tun if_bridge bridgestp usb wlan wlan_xauth wlan_acl wlan_wep wlan_tkip wlan_ccmp wlan_rssadapt wlan_amrr hwpmc ipfw ipfw_nat libalias ipfw_nptv6 rtwn rtwn_usb rtwnfw otus otusfw"
 
 options 	DDB
 options 	KDB
 options 	ALQ
 options         ALT_BREAK_TO_DEBUGGER
 
+options 	UMTX_CHAINS=16
+
 options 	SCHED_4BSD		#4BSD scheduler
 options 	INET			#InterNETworking
 #options 	INET6			#InterNETworking
 options 	TCP_HHOOK		# hhook(9) framework for TCP
 #options 	NFSCL			#Network Filesystem Client
 options 	PSEUDOFS		#Pseudo-filesystem framework
 options 	_KPOSIX_PRIORITY_SCHEDULING #Posix P1003_1B real-time extensions
 
 # Don't include the SCSI/CAM strings in the default build
 options 	SCSI_NO_SENSE_STRINGS
 options 	SCSI_NO_OP_STRINGS
 
 # .. And no sysctl strings
 options 	NO_SYSCTL_DESCR
 
 # For small memory footprints
 options		VM_KMEM_SIZE_SCALE=1
 
 # Limit IO size
 options 	NBUF=128
 
 # Limit UMTX hash size
 # options 	UMTX_NUM_CHAINS=64
 
 # PMC
 #options 	HWPMC_HOOKS
 #device		hwpmc
 #device		hwpmc_mips24k
 
 # options 	NFS_LEGACYRPC
 # Debugging for use in -current
 #options 	INVARIANTS
 #options 	INVARIANT_SUPPORT
 #options 	WITNESS
 #options 	WITNESS_SKIPSPIN
 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 	NO_FFS_SNAPSHOT		# We don't require snapshot support
 
 options		IPFIREWALL_DEFAULT_TO_ACCEPT
 
 # Wireless NIC cards
 options 	IEEE80211_DEBUG
 options 	IEEE80211_SUPPORT_MESH
 options 	IEEE80211_SUPPORT_TDMA
 options 	IEEE80211_SUPPORT_SUPERG
 options 	IEEE80211_ALQ	# 802.11 ALQ logging support
 device		wlan            # 802.11 support
 device		wlan_wep        # 802.11 WEP support
 device		wlan_ccmp       # 802.11 CCMP support
 device		wlan_tkip       # 802.11 TKIP support
 device		wlan_xauth	# 802.11 hostap support
 
 # ath(4)
 device		ath             # Atheros network device
 device		ath_rate_sample
 device		ath_ahb		# Atheros host bus glue
 options 	ATH_DEBUG
 options 	ATH_DIAGAPI
 option		ATH_ENABLE_11N
 option 		AH_DEBUG_ALQ
 
 #device		ath_hal
 device		ath_ar9300		# AR9330 HAL; no need for the others
 option		AH_DEBUG
 option		AH_SUPPORT_AR5416	# 11n HAL support
 option		AH_SUPPORT_AR9330	# Chipset support
 option		AH_AR5416_INTERRUPT_MITIGATION
 
 device		mii
 device		arge
 
 device		usb
 options 	USB_EHCI_BIG_ENDIAN_DESC        # handle big-endian byte order
 options 	USB_DEBUG
 options 	USB_HOST_ALIGN=32		# AR71XX (MIPS in general?) requires this
 device		ehci
 
 device		scbus
 device		umass
 device		da
 
 device		spibus
 device		ar71xx_spi
 device		mx25l
 device		ar71xx_wdog
 
 device		uart
 device		uart_ar933x
 
 device		ar71xx_apb
 
 device		loop
 device		ether
 device		md
 device		bpf
 device		random
 device		if_bridge
 device		gpio
 device		gpioled