freebsd-skq/sys/mips/conf/XLRN32
Jonathan T. Looney bd79708dbf In the TCP stack, the hhook(9) framework provides hooks for kernel modules
to add actions that run when a TCP frame is sent or received on a TCP
session in the ESTABLISHED state. In the base tree, this functionality is
only used for the h_ertt module, which is used by the cc_cdg, cc_chd, cc_hd,
and cc_vegas congestion control modules.

Presently, we incur overhead to check for hooks each time a TCP frame is
sent or received on an ESTABLISHED TCP session.

This change adds a new compile-time option (TCP_HHOOK) to determine whether
to include the hhook(9) framework for TCP. To retain backwards
compatibility, I added the TCP_HHOOK option to every configuration file that
already defined "options INET". (Therefore, this patch introduces no
functional change. In order to see a functional difference, you need to
compile a custom kernel without the TCP_HHOOK option.) This change will
allow users to easily exclude this functionality from their kernel, should
they wish to do so.

Note that any users who use a custom kernel configuration and use one of the
congestion control modules listed above will need to add the TCP_HHOOK
option to their kernel configuration.

Reviewed by:	rrs, lstewart, hiren (previous version), sjg (makefiles only)
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D8185
2016-10-12 02:16:42 +00:00

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# XLRN32 -- Kernel configuration file for N32 kernel on XLR/XLS
#
# For more information on this file, please read the handbook section on
# Kernel Configuration Files:
#
# http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig-config.html
#
# The handbook is also available locally in /usr/share/doc/handbook
# if you've installed the doc distribution, otherwise always see the
# FreeBSD World Wide Web server (http://www.FreeBSD.org/) for the
# latest information.
#
# 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.
#
# $FreeBSD$
machine mips mipsn32
ident XLRN32
include "../rmi/std.xlr"
makeoptions MODULES_OVERRIDE=""
makeoptions DEBUG=-g # Build kernel with gdb(1) debug symbols
makeoptions ARCH_FLAGS="-march=mips64 -mabi=n32"
makeoptions KERNLOADADDR=0x80100000
#profile 2
options SCHED_ULE # ULE scheduler
#options VERBOSE_SYSINIT
#options SCHED_4BSD # 4BSD scheduler
options SMP
options PREEMPTION # Enable kernel thread preemption
#options FULL_PREEMPTION # Enable kernel thread preemption
options INET # InterNETworking
options INET6 # IPv6 communications protocols
options TCP_HHOOK # hhook(9) framework for TCP
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 NFSCL
options NFS_ROOT
#
options BOOTP
options BOOTP_NFSROOT
options BOOTP_NFSV3
options BOOTP_WIRED_TO=nlge0
options BOOTP_COMPAT
options ROOTDEVNAME=\"nfs:10.1.1.8:/usr/extra/nfsroot\"
#
#options MD_ROOT # MD is a potential root device
#options MD_ROOT_SIZE=27000
#options MD_ROOT_SIZE=5120
#options ROOTDEVNAME=\"ufs:md0\"
options _KPOSIX_PRIORITY_SCHEDULING # POSIX P1003_1B real-time extensions
options HZ=1000
options NO_SWAPPING
#Debugging options
options KTRACE # ktrace(1) support
#options DDB
#options KDB
#options GDB
#options ALT_BREAK_TO_DEBUGGER
#options DEADLKRES #Enable the deadlock resolver
options INVARIANTS #Enable calls of extra sanity checking
options INVARIANT_SUPPORT #Extra sanity checks of internal structures, required by INVARIANTS
#options WITNESS #Enable checks to detect deadlocks and cycles
#options WITNESS_SKIPSPIN #Don't run witness on spinlocks for speed
#options KTR # ktr(4) and ktrdump(8) support
#options KTR_COMPILE=(KTR_LOCK|KTR_PROC|KTR_INTR|KTR_CALLOUT|KTR_UMA|KTR_SYSC)
#options KTR_ENTRIES=131072
#options LOCK_PROFILING
#options SLEEPQUEUE_PROFILING
#options TURNSTILE_PROFILING
device pci
#device ata
#options XLR_PERFMON # Enable XLR processor activity monitoring
options BREAK_TO_DEBUGGER
device uart
# Pseudo
device loop
device random
device md
device bpf
# Network
device miibus
device nlge
device ether
device re
device msk
device da
device scbus
#device ohci # OHCI PCI->USB interface
device ehci # EHCI PCI->USB interface (USB 2.0)
device usb # USB Bus (required)
options USB_DEBUG # enable debug msgs
#device udbp # USB Double Bulk Pipe devices
#device ugen # Generic
#device uhid # "Human Interface Devices"
device umass # Disks/Mass storage - Requires scbus and da
#device cfi
#i2c
device ic
device iic
device iicbb
device iicbus
device ds1374 # RTC on XLR boards
device max6657 # Temparature sensor on XLR boards
device at24co2n # EEPROM on XLR boards
#crypto
# Not yet
#device cryptodev
#device crypto
#device rmisec