2013-09-04 20:34:36 +00:00
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#
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# GXEMUL "oldtestmips" sample kernel configuration.
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#
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# $FreeBSD$
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#
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ident GXEMUL
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machine mips mips
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cpu CPU_MIPS4KC
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options HZ=100
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makeoptions KERNLOADADDR=0x80100000
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include "../gxemul/std.gxemul"
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hints "GXEMUL.hints" #Default places to look for devices.
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makeoptions DEBUG=-g #Build kernel with gdb(1) debug symbols
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makeoptions MODULES_OVERRIDE=""
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options DDB
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options KDB
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# Make an SMP-capable kernel by default
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options SMP # Symmetric MultiProcessor Kernel
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options SCHED_ULE
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options INET # InterNETworking
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options INET6 # IPv6 communications protocols
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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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options TCP_HHOOK # hhook(9) framework for TCP
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2013-09-04 20:34:36 +00:00
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options FFS #Berkeley Fast Filesystem
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# Debugging for use in -current
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#options DEADLKRES #Enable the deadlock resolver
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options INVARIANTS #Enable calls of extra sanity checking
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options INVARIANT_SUPPORT #Extra sanity checks of internal structures, required by INVARIANTS
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#options WITNESS #Enable checks to detect deadlocks and cycles
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#options WITNESS_SKIPSPIN #Don't run witness on spinlocks for speed
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options ROOTDEVNAME=\"ufs:gxemul_disk0\"
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device gxemul_cons
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device gxemul_disk
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device gxemul_ether
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# Pseudo devices.
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device loop # Network loopback
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device random # Entropy device
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device ether # Ethernet support
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device tun # Packet tunnel.
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device md # Memory "disks"
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device gif # IPv6 and IPv4 tunneling
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# The `bpf' device enables the Berkeley Packet Filter.
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# Be aware of the administrative consequences of enabling this!
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# Note that 'bpf' is required for DHCP.
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device bpf # Berkeley packet filter
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