UPDATING revision 143099
1Updating Information for FreeBSD current users 2 3This file is maintained and copyrighted by M. Warner Losh 4<imp@village.org>. See end of file for further details. For commonly 5done items, please see the COMMON ITEMS: section later in the file. 6 7Items affecting the ports and packages system can be found in 8/usr/ports/UPDATING. Please read that file before running 9portupgrade. 10 11NOTE TO PEOPLE WHO THINK THAT FreeBSD 6.x IS SLOW: 12 FreeBSD 6.x has many debugging features turned on, in 13 both the kernel and userland. These features attempt to detect 14 incorrect use of system primitives, and encourage loud failure 15 through extra sanity checking and fail stop semantics. They 16 also substantially impact system performance. If you want to 17 do performance measurement, benchmarking, and optimization, 18 you'll want to turn them off. This includes various WITNESS- 19 related kernel options, INVARIANTS, malloc debugging flags 20 in userland, and various verbose features in the kernel. Many 21 developers choose to disable these features on build machines 22 to maximize performance. 23 2420050227: 25 The on-disk format of LC_CTYPE files was changed to be machine 26 independent. Please make sure NOT to use NO_CLEAN buildworld 27 when crossing this point. 28 2920050225: 30 The ifi_epoch member of struct if_data has been changed to 31 contain the uptime at which the interface was created or the 32 statistics zeroed rather then the wall clock time because 33 wallclock time may go backwards. This should have no impact 34 unless an snmp implementation is using this value (I know of 35 none at this point.) 36 3720050224: 38 The acpi_perf and acpi_throttle drivers are now part of the 39 acpi(4) main module. They are no longer built separately. 40 4120050223: 42 The layout of struct image_params has changed. You have to 43 recompile all compatibility modules (linux, svr4, etc) for use 44 with the new kernel. 45 4620050223: 47 The p4tcc driver has been merged into cpufreq(4). This makes 48 "options CPU_ENABLE_TCC" obsolete. Please load cpufreq.ko or 49 compile in "device cpufreq" to restore this functionality. 50 5120050220: 52 The responsibility of recomputing the file system summary of 53 a SoftUpdates-enabled dirty volume has been transferred to the 54 background fsck. A rebuild of fsck(8) utility is recommended 55 if you have updated the kernel. 56 57 To get the old behavior (recompute file system summary at mount 58 time), you can set vfs.ffs.compute_summary_at_mount=1 before 59 mounting the new volume. 60 6120050206: 62 The cpufreq import is complete. As part of this, the sysctls for 63 acpi(4) throttling have been removed. The power_profile script 64 has been updated, so you can use performance/economy_cpu_freq in 65 rc.conf(5) to set AC on/offline cpu frequencies. 66 6720050206: 68 NG_VERSION has been increased. Recompiling kernel (or ng_socket.ko) 69 requires recompiling libnetgraph and userland netgraph utilities. 70 7120050114: 72 Support for abbreviated forms of a number of ipfw options is 73 now deprecated. Warnings are printed to stderr indicating the 74 correct full form when a match occurs. Some abbreviations may 75 be supported at a later date based on user feedback. To be 76 considered for support, abbreviations must be in use prior to 77 this commit and unlikely to be confused with current key words. 78 7920041221: 80 By a popular demand, a lot of NOFOO options were renamed 81 to NO_FOO (see bsd.compat.mk for a full list). The old 82 spellings are still supported, but will cause annoying 83 warnings on stderr. Make sure you upgrade properly (see 84 the COMMON ITEMS: section later in this file). 85 8620041219: 87 Auto-loading of ancillary wlan modules such as wlan_wep has 88 been temporarily disabled; you need to statically configure 89 the modules you need into your kernel or explicitly load them 90 prior to use. Specifically, if you intend to use WEP encryption 91 with an 802.11 device load/configure wlan_wep; if you want to 92 use WPA with the ath driver load/configure wlan_tkip, wlan_ccmp, 93 and wlan_xauth as required. 94 9520041213: 96 The behaviour of ppp(8) has changed slightly. If lqr is enabled 97 (``enable lqr''), older versions would revert to LCP ECHO mode on 98 negotiation failure. Now, ``enable echo'' is required for this 99 behaviour. The ppp version number has been bumped to 3.4.2 to 100 reflect the change. 101 10220041201: 103 The wlan support has been updated to split the crypto support 104 into separate modules. For static WEP you must configure the 105 wlan_wep module in your system or build and install the module 106 in place where it can be loaded (the kernel will auto-load 107 the module when a wep key is configured). 108 10920041201: 110 The ath driver has been updated to split the tx rate control 111 algorithm into a separate module. You need to include either 112 ath_rate_onoe or ath_rate_amrr when configuring the kernel. 113 11420041116: 115 Support for systems with an 80386 CPU has been removed. Please 116 use FreeBSD 5.x or earlier on systems with an 80386. 117 11820041110: 119 We have had a hack which would mount the root filesystem 120 R/W if the device were named 'md*'. As part of the vnode 121 work I'm doing I have had to remove this hack. People 122 building systems which use preloaded MD root filesystems 123 may need to insert a "/sbin/mount -u -o rw /dev/md0 /" in 124 their /etc/rc scripts. 125 12620041104: 127 FreeBSD 5.3 shipped here. 128 12920041102: 130 The size of struct tcpcb has changed again due to the removal 131 of RFC1644 T/TCP. You have to recompile userland programs that 132 read kmem for tcp sockets directly (netstat, sockstat, etc.) 133 13420041022: 135 The size of struct tcpcb has changed. You have to recompile 136 userland programs that read kmem for tcp sockets directly 137 (netstat, sockstat, etc.) 138 13920041016: 140 RELENG_5 branched here. For older entries, please see updating 141 in the RELENG_5 branch. 142 143COMMON ITEMS: 144 145 General Notes 146 ------------- 147 Avoid using make -j when upgrading. From time to time in the 148 past there have been problems using -j with buildworld and/or 149 installworld. This is especially true when upgrading between 150 "distant" versions (eg one that cross a major release boundary 151 or several minor releases, or when several months have passed 152 on the -current branch). 153 154 Sometimes, obscure build problems are the result of environment 155 poisoning. This can happen because the make utility reads its 156 environment when searching for values for global variables. 157 To run your build attempts in an "environmental clean room", 158 prefix all make commands with 'env -i '. See the env(1) manual 159 page for more details. 160 161 To build a kernel 162 ----------------- 163 If you are updating from a prior version of FreeBSD (even one just 164 a few days old), you should follow this procedure. With a 165 /usr/obj tree with a fresh buildworld, 166 make -DALWAYS_CHECK_MAKE buildkernel KERNCONF=YOUR_KERNEL_HERE 167 make -DALWAYS_CHECK_MAKE installkernel KERNCONF=YOUR_KERNEL_HERE 168 169 To just build a kernel when you know that it won't mess you up 170 -------------------------------------------------------------- 171 This assumes you are already running a 5.X system. Replace 172 ${arch} with the architecture of your machine (e.g. "i386", 173 "alpha", "amd64", "ia64", "pc98", "sparc64", etc). 174 175 cd src/sys/${arch}/conf 176 config KERNEL_NAME_HERE 177 cd ../compile/KERNEL_NAME_HERE 178 make depend 179 make 180 make install 181 182 If this fails, go to the "To build a kernel" section. 183 184 To rebuild everything and install it on the current system. 185 ----------------------------------------------------------- 186 # Note: sometimes if you are running current you gotta do more than 187 # is listed here if you are upgrading from a really old current. 188 189 <make sure you have good level 0 dumps> 190 <maybe fix /etc/fstab> [7] 191 make buildworld 192 make kernel KERNCONF=YOUR_KERNEL_HERE 193 [1] 194 <reboot in single user> [3] 195 src/etc/rc.d/preseedrandom [10] 196 mergemaster -p [5] 197 make installworld 198 mergemaster [4] 199 <reboot> 200 201 202 To cross-install current onto a separate partition 203 -------------------------------------------------- 204 # In this approach we use a separate partition to hold 205 # current's root, 'usr', and 'var' directories. A partition 206 # holding "/", "/usr" and "/var" should be about 2GB in 207 # size. 208 209 <make sure you have good level 0 dumps> 210 <boot into -stable> 211 make buildworld 212 make buildkernel KERNCONF=YOUR_KERNEL_HERE 213 <maybe newfs current's root partition> 214 <mount current's root partition on directory ${CURRENT_ROOT}> 215 make installworld DESTDIR=${CURRENT_ROOT} 216 cd src/etc; make distribution DESTDIR=${CURRENT_ROOT} # if newfs'd 217 make installkernel KERNCONF=YOUR_KERNEL_HERE DESTDIR=${CURRENT_ROOT} 218 cp /etc/fstab ${CURRENT_ROOT}/etc/fstab # if newfs'd 219 <edit ${CURRENT_ROOT}/etc/fstab to mount "/" from the correct partition> 220 <reboot into current> 221 <do a "native" rebuild/install as described in the previous section> 222 <maybe install compatibility libraries from src/lib/compat> 223 <reboot> 224 225 226 To upgrade in-place from 5.x-stable to current 227 ---------------------------------------------- 228 <make sure you have good level 0 dumps> 229 make buildworld [9] 230 make kernel KERNCONF=YOUR_KERNEL_HERE [8] 231 [1] 232 <reboot in single user> [3] 233 mergemaster -p [5] 234 make installworld 235 mergemaster -i [4] 236 <reboot> 237 238 Make sure that you've read the UPDATING file to understand the 239 tweaks to various things you need. At this point in the life 240 cycle of current, things change often and you are on your own 241 to cope. The defaults can also change, so please read ALL of 242 the UPDATING entries. 243 244 Also, if you are tracking -current, you must be subscribed to 245 freebsd-current@freebsd.org. Make sure that before you update 246 your sources that you have read and understood all the recent 247 messages there. If in doubt, please track -stable which has 248 much fewer pitfalls. 249 250 [1] If you have third party modules, such as vmware, you 251 should disable them at this point so they don't crash your 252 system on reboot. 253 254 [3] From the bootblocks, boot -s, and then do 255 fsck -p 256 mount -u / 257 mount -a 258 cd src 259 adjkerntz -i # if CMOS is wall time 260 Also, when doing a major release upgrade, it is required that 261 you boot into single user mode to do the installworld. 262 263 [4] Note: This step is non-optional. Failure to do this step 264 can result in a significant reduction in the functionality of the 265 system. Attempting to do it by hand is not recommended and those 266 that pursue this avenue should read this file carefully, as well 267 as the archives of freebsd-current and freebsd-hackers mailing lists 268 for potential gotchas. 269 270 [5] Usually this step is a noop. However, from time to time 271 you may need to do this if you get unknown user in the following 272 step. It never hurts to do it all the time. You may need to 273 install a new mergemaster (cd src/usr.sbin/mergemaster && make 274 install) after the buildworld before this step if you last updated 275 from current before 20020224 or from -stable before 20020408. 276 277 [8] In order to have a kernel that can run the 4.x binaries 278 needed to do an installworld, you must include the COMPAT_FREEBSD4 279 option in your kernel. Failure to do so may leave you with a system 280 that is hard to boot to recover. 281 282 Make sure that you merge any new devices from GENERIC since the 283 last time you updated your kernel config file. 284 285 [9] When checking out sources, you must include the -P flag to have 286 cvs prune empty directories. 287 288 If CPUTYPE is defined in your /etc/make.conf, make sure to use the 289 "?=" instead of the "=" assignment operator, so that buildworld can 290 override the CPUTYPE if it needs to. 291 292 MAKEOBJDIRPREFIX must be defined in an environment variable, and 293 not on the command line, or in /etc/make.conf. buildworld will 294 warn if it is improperly defined. 295FORMAT: 296 297This file contains a list, in reverse chronological order, of major 298breakages in tracking -current. Not all things will be listed here, 299and it only starts on October 16, 2004. Updating files can found in 300previous releases if your system is older than this. 301 302Copyright information: 303 304Copyright 1998-2005 M. Warner Losh. All Rights Reserved. 305 306Redistribution, publication, translation and use, with or without 307modification, in full or in part, in any form or format of this 308document are permitted without further permission from the author. 309 310THIS DOCUMENT IS PROVIDED BY WARNER LOSH ``AS IS'' AND ANY EXPRESS OR 311IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 312WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 313DISCLAIMED. IN NO EVENT SHALL WARNER LOSH BE LIABLE FOR ANY DIRECT, 314INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 315(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 316SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 317HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 318STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 319IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 320POSSIBILITY OF SUCH DAMAGE. 321 322If you find this document useful, and you want to, you may buy the 323author a beer. 324 325Contact Warner Losh if you have any questions about your use of 326this document. 327 328$FreeBSD: head/UPDATING 143099 2005-03-03 08:44:33Z imp $ 329