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Diffstat (limited to 'sys/doc/Changes')
| -rw-r--r-- | sys/doc/Changes | 277 |
1 files changed, 277 insertions, 0 deletions
diff --git a/sys/doc/Changes b/sys/doc/Changes new file mode 100644 index 000000000000..685f1f3173b5 --- /dev/null +++ b/sys/doc/Changes @@ -0,0 +1,277 @@ +Hello, Emacs, this is an -*- Indented-Text -*- file! + +$Id: Changes,v 1.5 1994/04/20 19:22:38 wollman Exp $ + +This file is intended to keep track of important kernel and user +changes in FreeBSD between releases. Entries are in reverse +chronological order; userids can be decoded with the chart at the end +of this file. + +--------------- +Since 1.1 BETA: +--------------- + +- I/O clustering is implemented for all block devices. This should + substantially improve the performance of disk drives which don't + have write-behind caches, especially on IDE drives. (dyson/davidg) + +- Allow mbufs to point to other ``external'' objects than just + clusters, and add in performance enhancements for NFS from Yuval + Yarom. (davidg) + +- Yet more VM system improvements. (dyson/davidg) + o 4-MB systems should now spend substantially less time in the VM + system. + o General cleanup and some portability fixes. + o A new system process is now responsible for keeping page + statistics, rather than making the pagedaemon do it, which was + getting impractical. Performance is improved on small-memory + machines. + o Process resource usage counters are now properly updated for + faults and swaps. + +- Fixed bugs in truncating mapped files. (dyson/davidg) + +- A new version of the interrupt-handler glue code has been added, which + is faster and architecturally cleaner than the previous version. The + beginnings of better profiling support have also been added. (bde/davidg) + +- This file moved from /sys/i386/doc to /sys/doc. (wollman) + +- Bounce buffers have been implemented for ISA devices which use + DMA (although not all devices can make use of it yet). (davidg/dyson) + +- The set*id() functions have been changed (wollman): + o A significant security hole involving the POSIX saved uid and gid + has been plugged. + o The setreuid() and setregid() functions now never change the real + ID, but rather only ensure that you will be able to change the + EFFECTIVE ID back to what you specified as a real ID. This change + breaks the setruid() and setrgid() functions, which were a bad + idea in a POSIX environment anyway. Logic taken from 4.4BSD. + o The SUGID process flag bit has been implemented as in 4.4, and the + `ps' program modified to print it out. + +- The scheduling algorithm has been changed to penalize + processes that fork a lot, like `make', which should enhance + interactive performance during such operations significantly. + (davidg/dyson) + +- MCLBYTES is now 4096, so each mbuf cluster is given a whole page, in + preparation for page flipping. (davidg/dyson) + +- More VM system improvements (dyson/davidg): + o Pre-faulting of initial pages on process startup and mmap (faster + than starting and immediately taking a fault). + o Even more efficient physical map (pmap) code. + o Pageouts are now clustered, similar to pagein clustering in 1.1. + o The pageout code is more efficient and keeps better statistics. + o The procfs can now provide more information from the VM system. + o Some pager bugs have been fixed. + +- Improved IP checksum and bzero routines. (bde/dyson) + +- The Mitsumi CD-ROM driver is more careful about recognizing Ethernet + cards as CD-ROMs. (jkh) + +- `struct tty's now allocated dynamically, and ring buffers can be + deallocated. (guido) + + +--------------------------- +Between 1.1 BETA and 1.0.2: +--------------------------- + +- QIC-40 and QIC-80 tapes are now supported, using the `ft' driver + from Jim Babb. (alm/nate) + +- Improved lpt driver, should no longer lock up when lprm is done on + an active job. Fixed up the probe routine so that it works on most + if not all printers now. (csgr/rgrimes) + +- Substantial changes to system configuration; you MUST re-build + `config' before attempting to build a 1.1 kernel. (nate/martin) + +- Improved the quality of the information given to the user when + a fatal trap occurs. (davidg) + +- Added support in the if_ed driver for the WD8013W, WD8003W, and + WD8003EB. (davidg) + +- Change to generic console code to eliminate console hangs with all + `pc' consoles. (davidg) + +- Upgrade to new version of syscons which handles the `hanging console' + problem and adds some new features and code cleanup. (nate) + +- Various TCP bugs fixed - don't forward loopback packets; Nagel + congestion avoidence - immediately ack small packets. (davidg) + +- TCP debugging code is now truly optional, thus reducing kernel size + when it is disabled (the default). (davidg) + +- Because the `sio' FIFOs are now configurable, the `com' driver is no + longer supported. (team sighs with relief) + +- Performance and stylistic improvements to the `sio' serial driver. + Probe code now works somewhat better for oddball devices. The 16550 + FIFO length is now configurable using `flags' in the config + declaration. (ache/bde) + +- Performance improvements and complete implementation of POSIX VMIN + and VTIME for the generic TTY code. (ache/bde) + +- Crash dumps on SCSI disks now work and are standard. (rgrimes/davidg) + +- QMAGIC is now the official default executable format. (davidg) + +- Network booting is now supported, as is booting from DOS. (martin) + +- Local LDTs are now supported for WINE (based on work by John Brezak). + (hsu/davidg) + +- DDB will now print symbolic arguments and line numbers in + backtraces (from John Brezak). (davidg) + +- Added four pattern memory test to eliminate problems with buggy + chipsets that incorrectly map memory, and to find problems with + defective memory. The memory sizing code has been improved to + further eliminate problems with buggy chipsets/BIOSs. (davidg) + +- USE_486_WRITE_PROTECT is now gone; the system will automatically + detect 486 CPUs and behave accordingly. (davidg) + +- Added SysV IPC, messaging, and semaphore code by Danny Boulet. + (hsu/davidg) + +- Because of the VM system changes, Paul Kranenburg's process + filesystem is now MANDATORY in order for `ps' and friends to be able + to dig up process information which has been paged out. (davidg) + +- Substantial VM system improvements: (dyson/davidg) + o FreeBSD once again works on 4-MB machines. + o Maximum and default size limits set to reasonable values. + o The user area is now in the process address space, and can + now be paged out along with the rest of the process. + o Process page tables can now be paged out. + o The physical map (pmap) module has been mostly rewritten for + efficiency, and is considerably faster than it used to be. + o The pageout system now actually implements modified LRU. + o Process RSS soft limits implemented. Hooks are in place for + RSS hard limits. + o Pagers can now do multiple-page operations ("page fault + clustering"), and page fault read behind and read ahead + have been implemented to take advantage of this. + o The vnode pager no longer drags pages through the buffer + cache, eliminating an expensive memory copy and flushing + of cached data. + o When the system runs out of swap space, the faulting process + is killed off (with a message to syslog); the old code would + just deadlock. + o Swap space allocation is much more efficient, and swap + striping actually works now. It's now possible for every + last block of swap space to be used before the systems runs + out. + o The pagedaemon's algorithms are considerably improved, thus + reducing the amount of CPU time used by the pagedaemon. + o All kernels MUST now load at virtual address 0xf010000, and + the lower 640k is reclaimed for system use. This removes + the 640K kernel size limit. + o VM object cache size is now dynamic and a function of the + kernel `maxusers' parameter. + o Memory in the I/O hole is explicitly marked non-cacheable. + +- Added 3C509 driver written by Herb Peyerl. (ats/nate) + +- Added a new `wd' driver which does a much better job of probing, handles + stray interrupts better, and supports multiple controllers. In addition + this driver supports DOS partitions much better and conforms to ATA specs + much better. NB: configuration lines for this driver are different + than those for pervious versions; see a GENERIC for details. + (nate/bde/guido) + +- Added support in the if_ed driver for the Toshiba ethernet cards.The + support must be enabled with an "options TOSH_ETHER" in the config + file. Done it this way, because I don't know how widespread the cards + are. (ats) + +- Added support in the if_ed driver for the SMC Ultra via patches from + Glen Lowe. (davidg) + +- Updated Mitsumi CD driver to work with FX models. (jkh/Gary + Clark II) + +- Add extended formats set to floppy driver, improve autoconfiguration, + add "fdformat" utility for floppy formatting. + The format of floppy disk minor numbers has changed, thus + necessitating a new `MAKEDEV fd'. (ache/joerg/Serge Vakulenko) + +- Add XNTPD to contrib section, and (un-compilable) kernel support for + same to /sys/kern. (wollman) + +- Use linker-constructed sets to initialize certain system tables + rather than manually enumerating all the options in the source files. + This makes certain pseudo-devices and all image activators drop-in at + link time, if desired. (wollman) + +- Added YP code from Theo Deraadt. (paul/nate) + +- Make all mandatory options ``standard''. (wollman) + +- Update `wt' driver to support more devices and controllers. The + driver will also auto-detect tape density on models which support + it. The structure of `wt' device minor numbers has changed; + `MAKEDEV wt' must be run to create the new device nodes. + +- Re-design execve() system call to allow for multiple ``image activators'' + which recognize and load various file formats. Currently only + a.out and interpreted formats are recognized. (davidg) + +- Provide the address of the faulting reference to signal handlers, to + make life easier for smart garbage-collection algorithms. (hsu) + +- New, improved process tracing code from Sean Eric Fagan. (davidg) + +- Re-organize locore into several different source files according to + function. (davidg) + +- On panic, don't reboot right away but give the user some time to + abort the reboot or at least write down the panic message. (davidg) + +- Kernel timezone handling is now delegated to an external program, + `adjkerntz'. No more bogus summer time jumps. (ache) + +- Separate all IP-related variables that users might want to modify into + netinet/in_var.c. (wollman) + +- New, redesigned SCSI system; should run faster and have fewer bugs. + (julian) + +- Make it possible to mmap(2) /dev/mem. (julian) + + +----------------------- +Userids map as follows: +----------------------- +ache Andrew Chernov +alm Andrew Moore +ats Andreas Schulz +chmr Christoph Robitscho +csgr Geoff Rehmet +davidg David Greenman +dyson John Dyson +guido Guido van Rooij +hsu Jeffrey Hsu +jkh Jordan Hubbard +joerg Joerg Wunsch +jtc J.T. Conklin +ljo L. Jonas Olson +martin Martin Renters +nate Nate Williams +paul Paul Richards +proven Chris Provenzano +rich Rich Murphey +rls Rob Shady +smace Scott Mace +swallace Steven Wallace +wollman Garrett Wollman |