Author: rwatson
Date: Mon Dec 13 12:34:35 2010
New Revision: 216406
URL: http://svn.freebsd.org/changeset/base/216406
Log:
Merge r216365 from head to stable/8:
Derive the XENHVM kernel from GENERIC, adding only the options required
to support PV drivers (such as xenpci), and non-adptive locking (along
with a comment about why).
This change eliminates the synchronisation problem between GENERIC and
XENHVM, which had become severely rotted in HEAD, and in 8-STABLE
included non-production kernel debugging features such as WITNESS.
However, it comes at the cost of enabling devices and options that may
not be present under Xen (such as random ethernet cards). For now, opt
for a simpler kernel configuration file rather than using nooptions/
nodevice to enumerate and eliminate them. This leads to a somewhat
larger XENHVM kernel.
This is an MFC candidate for 8-STABLE before 8.2, in order to provide
a production-worthy XENHVM kernel configuration for amd64.
Discussed with: gibbs, cperciva
Reported by: Piete Brooks <Piete.Brooks at cl.cam.ac.uk>
Sponsored by: DARPA, AFRL
Approved by: re (kib)
Modified:
stable/8/sys/amd64/conf/XENHVM
Directory Properties:
stable/8/sys/ (props changed)
stable/8/sys/amd64/include/xen/ (props changed)
stable/8/sys/cddl/contrib/opensolaris/ (props changed)
stable/8/sys/contrib/dev/acpica/ (props changed)
stable/8/sys/contrib/pf/ (props changed)
Modified: stable/8/sys/amd64/conf/XENHVM
==============================================================================
--- stable/8/sys/amd64/conf/XENHVM Mon Dec 13 12:15:46 2010
(r216405)
+++ stable/8/sys/amd64/conf/XENHVM Mon Dec 13 12:34:35 2010
(r216406)
@@ -1,161 +1,23 @@
#
# XENHVM -- Xen HVM kernel configuration file for FreeBSD/amd64
#
-# For more information on this file, please read the config(5) manual page,
-# and/or 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.
-#
# $FreeBSD$
-
-cpu HAMMER
-ident XENHVM
-
-# To statically compile in device wiring instead of /boot/device.hints
-#hints "GENERIC.hints" # Default places to look for devices.
-
-# Use the following to compile in values accessible to the kernel
-# through getenv() (or kenv(1) in userland). The format of the file
-# is 'variable=value', see kenv(1)
#
-# env "GENERIC.env"
+include GENERIC
+ident XENHVM
-makeoptions DEBUG=-g # Build kernel with gdb(1) debug symbols
makeoptions MODULES_OVERRIDE=""
-options SCHED_ULE # ULE scheduler
-options PREEMPTION # Enable kernel thread preemption
-options INET # InterNETworking
-options INET6 # IPv6 communications protocols
-options SCTP # Stream Control Transmission Protocol
-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 NFSCLIENT # Network Filesystem Client
-options NFSSERVER # Network Filesystem Server
-options NFSLOCKD # Network Lock Manager
-options NFS_ROOT # NFS usable as /, requires NFSCLIENT
-options MSDOSFS # MSDOS Filesystem
-options CD9660 # ISO 9660 Filesystem
-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 (sgtty)
-options COMPAT_FREEBSD32 # Compatible with i386 binaries
-options COMPAT_FREEBSD4 # Compatible with FreeBSD4
-options COMPAT_FREEBSD5 # Compatible with FreeBSD5
-options COMPAT_FREEBSD6 # Compatible with FreeBSD6
-options COMPAT_FREEBSD7 # Compatible with FreeBSD7
-options SCSI_DELAY=5000 # 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 HWPMC_HOOKS # Necessary kernel hooks for hwpmc(4)
-options AUDIT # Security event auditing
-#options KDTRACE_FRAME # Ensure frames are compiled in
-#options KDTRACE_HOOKS # Kernel DTrace hooks
+#
+# Adaptive locks rely on a lock-free pointer read to determine the run state
+# of the thread holding a lock when under contention; under a virtualisation
+# system, the thread run state may not accurately reflect whether the thread
+# (or rather its host VCPU) is actually executing. As such, disable this
+# optimisation.
+#
options NO_ADAPTIVE_MUTEXES
options NO_ADAPTIVE_RWLOCKS
-# Debugging for use in -current
-options KDB # Enable kernel debugger support.
-options DDB # Support DDB.
-options GDB # Support remote GDB.
-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
-
-# Make an SMP-capable kernel by default
-options SMP # Symmetric MultiProcessor Kernel
-
-# CPU frequency control
-device cpufreq
-
-# Bus support.
-device acpi
-device pci
-
-# Floppy drives
-device fdc
-
# Xen HVM support
options XENHVM
device xenpci
-
-# ATA and ATAPI devices
-device ata
-device atadisk # ATA disk drives
-device ataraid # ATA RAID drives
-device atapicd # ATAPI CDROM drives
-device atapifd # ATAPI floppy drives
-device atapist # ATAPI tape drives
-options ATA_STATIC_ID # Static device numbering
-
-# SCSI peripherals
-device scbus # SCSI bus (required for SCSI)
-device ch # SCSI media changers
-device da # Direct Access (disks)
-device sa # Sequential Access (tape etc)
-device cd # CD
-device pass # Passthrough device (direct SCSI access)
-device ses # SCSI Environmental Services (and SAF-TE)
-
-
-# atkbdc0 controls both the keyboard and the PS/2 mouse
-device atkbdc # AT keyboard controller
-device atkbd # AT keyboard
-device psm # PS/2 mouse
-
-device kbdmux # keyboard multiplexer
-
-device vga # VGA video card driver
-
-device splash # Splash screen and screen saver support
-
-# syscons is the default console driver, resembling an SCO console
-device sc
-
-device agp # support several AGP chipsets
-
-# Serial (COM) ports
-device uart # Generic UART driver
-
-# PCI Ethernet NICs that use the common MII bus controller code.
-# NOTE: Be sure to keep the 'device miibus' line in order to use these NICs!
-device miibus # MII bus support
-device re # RealTek 8139C+/8169/8169S/8110S
-
-# Pseudo devices.
-device loop # Network loopback
-device random # Entropy device
-device ether # Ethernet support
-device tun # Packet tunnel.
-device pty # BSD-style compatibility pseudo ttys
-device md # Memory "disks"
-device gif # IPv6 and IPv4 tunneling
-device faith # IPv6-to-IPv4 relaying (translation)
-device firmware # firmware assist module
-
-# The `bpf' device enables the Berkeley Packet Filter.
-# Be aware of the administrative consequences of enabling this!
-# Note that 'bpf' is required for DHCP.
-device bpf # Berkeley packet filter
_______________________________________________
svn-src-all@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/svn-src-all
To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
