Randall Stewart
b8d60729de
NOTE: HEADS UP read the note below if your kernel config is not including GENERIC!! This patch does a bit of cleanup on TCP congestion control modules. There were some rather interesting surprises that one could get i.e. where you use a socket option to change from one CC (say cc_cubic) to another CC (say cc_vegas) and you could in theory get a memory failure and end up on cc_newreno. This is not what one would expect. The new code fixes this by requiring a cc_data_sz() function so we can malloc with M_WAITOK and pass in to the init function preallocated memory. The CC init is expected in this case *not* to fail but if it does and a module does break the "no fail with memory given" contract we do fall back to the CC that was in place at the time. This also fixes up a set of common newreno utilities that can be shared amongst other CC modules instead of the other CC modules reaching into newreno and executing what they think is a "common and understood" function. Lets put these functions in cc.c and that way we have a common place that is easily findable by future developers or bug fixers. This also allows newreno to evolve and grow support for its features i.e. ABE and HYSTART++ without having to dance through hoops for other CC modules, instead both newreno and the other modules just call into the common functions if they desire that behavior or roll there own if that makes more sense. Note: This commit changes the kernel configuration!! If you are not using GENERIC in some form you must add a CC module option (one of CC_NEWRENO, CC_VEGAS, CC_CUBIC, CC_CDG, CC_CHD, CC_DCTCP, CC_HTCP, CC_HD). You can have more than one defined as well if you desire. Note that if you create a kernel configuration that does not define a congestion control module and includes INET or INET6 the kernel compile will break. Also you need to define a default, generic adds 'options CC_DEFAULT=\"newreno\" but you can specify any string that represents the name of the CC module (same names that show up in the CC module list under net.inet.tcp.cc). If you fail to add the options CC_DEFAULT in your kernel configuration the kernel build will also break. Reviewed by: Michael Tuexen Sponsored by: Netflix Inc. RELNOTES:YES Differential Revision: https://reviews.freebsd.org/D32693
95 lines
4.1 KiB
Plaintext
95 lines
4.1 KiB
Plaintext
# Standard kernel config items for all ARMv7 systems.
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#
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# $FreeBSD$
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options HZ=1000
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options INTRNG # All arm systems use INTRNG these days
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options PREEMPTION # Enable kernel thread preemption
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options VIMAGE # Subsystem virtualization, e.g. VNET
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options INET # InterNETworking
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options INET6 # IPv6 communications protocols
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options CC_NEWRENO # include newreno congestion control
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options CC_DEFAULT=\"newreno\" # define our default CC module it should be compiled in.
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options TCP_HHOOK # hhook(9) framework for TCP
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device crypto # core crypto support
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options IPSEC_SUPPORT # Allow kldload of ipsec and tcpmd5
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options SCTP_SUPPORT # Allow kldload of SCTP
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options FFS # Berkeley Fast Filesystem
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options SOFTUPDATES # Enable FFS soft updates support
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options UFS_ACL # Support for access control lists
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options UFS_DIRHASH # Improve performance on big directories
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options UFS_GJOURNAL # Enable gjournal-based UFS journaling
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options QUOTA # Enable disk quotas for UFS
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options NFSCL # Network Filesystem Client
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options NFSLOCKD # Network Lock Manager
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options NFS_ROOT # NFS usable as /, requires NFSCL
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options MSDOSFS # MSDOS Filesystem
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options CD9660 # ISO 9660 Filesystem
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options PROCFS # Process filesystem (requires PSEUDOFS)
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options PSEUDOFS # Pseudo-filesystem framework
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options TMPFS # Efficient memory filesystem
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options GEOM_PART_GPT # GUID Partition Tables
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options GEOM_PART_BSD # BSD partition scheme
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options GEOM_PART_MBR # MBR partition scheme
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options GEOM_LABEL # Provides labelization
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options COMPAT_43 # Compatible with BSD 4.3 [KEEP THIS!]
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options SCSI_DELAY=5000 # Delay (in ms) before probing SCSI
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options KTRACE # ktrace(1) support
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options STACK # stack(9) support
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options SYSVSHM # SYSV-style shared memory
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options SYSVMSG # SYSV-style message queues
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options SYSVSEM # SYSV-style semaphores
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options _KPOSIX_PRIORITY_SCHEDULING # POSIX P1003_1B real-time extensions
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options PRINTF_BUFR_SIZE=128 # Prevent printf output being interspersed.
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options KBD_INSTALL_CDEV # install a CDEV entry in /dev
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options HWPMC_HOOKS # Necessary kernel hooks for hwpmc(4)
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options CAPABILITY_MODE # Capsicum capability mode
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options CAPABILITIES # Capsicum capabilites
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options FREEBSD_BOOT_LOADER # Process metadata passed from loader(8)
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options VFP # Enable floating point hardware support
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options MAC # Support for Mandatory Access Control (MAC)
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options COMPAT_FREEBSD10 # Compatible with FreeBSD10
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options COMPAT_FREEBSD11 # Compatible with FreeBSD11
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options COMPAT_FREEBSD12 # Compatible with FreeBSD12
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# DTrace support
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options KDTRACE_HOOKS # Kernel DTrace hooks
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options DDB_CTF # all architectures - kernel ELF linker loads CTF data
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makeoptions WITH_CTF=1
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# Debugging support. Always need this:
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makeoptions DEBUG=-g # Build kernel with gdb(1) debug symbols
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options KDB # Enable kernel debugger support.
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options KDB_TRACE # Print a stack trace for a panic.
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# For full debugger support use (turn off in stable branch):
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options DDB # Support DDB
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options GDB # Support remote GDB
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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 MALLOC_DEBUG_MAXZONES=8 # Separate malloc(9) zones
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options ALT_BREAK_TO_DEBUGGER # Enter debugger on keyboard escape sequence
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options USB_DEBUG # Enable usb debug support code
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options VERBOSE_SYSINIT=0 # Support debug.verbose_sysinit, off by default
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# Optional extras, never enabled by default:
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#options BOOTVERBOSE
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#options DEBUG # May result in extreme spewage
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#options KTR
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#options KTR_COMPILE=KTR_ALL
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#options KTR_ENTRIES=16384
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#options KTR_MASK=(KTR_SPARE2)
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#options KTR_VERBOSE=0
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#options USB_REQ_DEBUG
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#options USB_VERBOSE
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# Enable support for the kernel PLL to use an external PPS signal,
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# under supervision of [x]ntpd(8)
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# More info in ntpd documentation: http://www.eecis.udel.edu/~ntp
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options PPS_SYNC
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