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Subject[STATUS 2.5] February 27, 2002
The latest status update is available at http://kernelnewbies.org/status/

A couple patches aiming at providing better scalability for gazillions of
CPUs resurfaced this week, including Rusty Russell's per_cpu patch and
Russ Weight's scalable cpu bitmaps patch (see the links on the Web page
for details).

And don't forget to let me know if anything is out of date :-)
Enjoy!

-- Guillaume

-----------------------------------------------------------
Kernel 2.5 status - February 27th, 2002
(Latest kernel release is 2.5.6-pre1)


Features:

Merged
o in 2.5.1+ Rewrite of the block IO (bio) layer (Jens Axboe)
o in 2.5.2 Initial support for USB 2.0 (David Brownell, Greg Kroah-Hartman, etc.)
o in 2.5.2 Per-process namespaces, late-boot cleanups (Al Viro, Manfred Spraul)
o in 2.5.2+ New scheduler for improved scalability (Ingo Molnar)
o in 2.5.2+ New kernel device structure (kdev_t) (Linus Torvalds, etc.)
o in 2.5.3 IDE layer update (Andre Hedrick)
o in 2.5.3 New driver API for Wireless Extensions (1/2) (Jean Tourrilhes)
o in 2.5.3 Support reiserfs external journal (Reiserfs team)
o in 2.5.3 Generic ACL (Access Control List) support (Nathan Scott)
o in 2.5.3 PnP BIOS driver (Alan Cox, Thomas Hood, Dave Jones, etc.)
o in 2.5.3+ New driver model & unified device tree (Patrick Mochel)
o in 2.5.4 Add preempt kernel option (Robert Love, MontaVista team)
* in 2.5.4 Support for Next Generation POSIX Threading (NGPT team)
o in 2.5.4+ Porting all input devices over to input API (Vojtech Pavlik, James Simmons)
o in 2.5.5 Add ALSA (Advanced Linux Sound Architecture) (ALSA team)
* in 2.5.5 Pagetables in highmem support (Ingo Molnar, Arjan van de Ven)

o Pending Finalize new device naming convention (Linus Torvalds)
o in -ac 32bit UID quota support (?)

o Ready Add User-Mode Linux (UML) (Jeff Dike)
o Ready HDLC (High-level Data Link Control) update (Krzysztof Halasa)
o Ready Add hardware sensors drivers (lm_sensors team)
o Ready New kernel config system: CML2 (Eric Raymond)
o Ready Add JFS (Journaling FileSystem from IBM) (JFS team)
o Ready Read-Copy Update Mutual Exclusion (Dipankar Sarma, Rusty Russell, Andrea Arcangeli, LSE
Team)
* Ready per_cpu infrastructure (Rusty Russell)

o Beta New kernel build system (kbuild 2.5) (Keith Owens)
o Beta Add support for CPU clock/voltage scaling (Erik Mouw, Dave Jones, Russell King, Arjan van de
Ven)
o Beta Serial driver restructure (Russell King)
o Beta New IO scheduler (Jens Axboe)
o Beta NAPI Network interrupt mitigation (Jamal Hadi Salim, Robert Olsson, Alexey Kuznetsov)
o Beta Add XFS (A journaling filesystem from SGI) (XFS team)
o Beta New VM with reverse mappings (Rik van Riel)
o Beta Fix long-held locks for low scheduling latency (Andrew Morton, etc.)
o Beta Build option for Linux Trace Toolkit (LTT) (Karim Yaghmour)
o Beta Better event logging for enterprise systems (evlog team)
o Beta Add Linux Security Module (LSM) (LSM team)
o Beta Hotplug CPU support (Rusty Russell)
o Beta Per-mountpoint read-only, union-mounts, unionfs (Al Viro)
o Beta EVMS (Enterprise Volume Management System) (EVMS team)
o Beta LVM (Logical Volume Manager) v2.0 (LVM team)
o Beta Linux booting ELF images (Eric Biederman)
o Beta First pass at LinuxBIOS support (Eric Biederman)
o Beta Dynamic Probes (Suparna Bhattacharya, dprobes team)
o Beta Video for Linux (V4L) redesign (Gerd Knorr)
o Beta Scalable CPU bitmaps (Russ Weight)
* Beta Page table sharing (Daniel Phillips)

o Alpha Better support of high-end NUMA machines (NUMA team)
o Alpha Add Asynchronous IO (aio) support (Ben LaHaise)
o Alpha Overhaul PCMCIA support (David Woodhouse, David Hinds)
o Alpha Replace old NTFS driver with NTFS TNG driver (Anton Altaparmakov)
o Alpha More complete IEEE 802.2 stack (Arnaldo, Jay Schullist, from Procom donated code)
o Alpha Full compliance with IPv6 (Alexey Kuznetzov, Jun Murai, Yoshifuji Hideaki,
USAGI team)
o Alpha UMSDOS (Unix under MS-DOS) Rewrite (Al Viro)
o Alpha Scalable Statistics Counter (Ravikiran Thirumalai)
o Alpha Linux Kernel Crash Dumps (Matt Robinson, LKCD team)
o Alpha Add support for NFS v4 (NFS v4 team)

o Started Rewrite of the framebuffer layer (James Simmons)
o Started Rewrite of the console layer (James Simmons)
o Started More complete NetBEUI stack (Arnaldo Carvalho de Melo, from Procom donated code)
o Started Remove use of the BKL (Big Kernel Lock) (Alan Cox, Robert Love, Neil Brown, etc.)
o Started Change all drivers to new driver model (All maintainers)
o Started Reiserfs v4 (Reiserfs team)
o Started Move ISDN4Linux to CAPI based interface (ISDN4Linux team)

o Draft #2 New lightweight library (klibc) (Greg Kroah-Hartman)
o Draft #3 Replace initrd by initramfs (H. Peter Anvin, Al Viro)
o Planning Add thrashing control (Rik van Riel)
o Planning Remove all hardwired drivers from kernel (Alan Cox, etc.)
o Planning Generic parameter/command line interface (Keith Owens)
o Planning New mount API (Al Viro)
o Planning New MTRR (Memory Type Range Register) driver (Dave Jones)


Cleanups:

Merged
o in 2.5.3 Break Configure.help into multiple files (Linus Torvalds)
o in 2.5.3 Untangle include file dependancies (Dave Jones, Roman Zippel)
o in 2.5.4 Per network protocol slabcache & sock.h (Arnaldo Carvalho de Melo)
o in 2.5.4 Per filesystem slabcache & fs.h (Daniel Phillips, Jeff Garzik, Al Viro)

o Ready Switch to ->get_super() for file_system_type (Al Viro)
o Ready ->getattr() ->setattr() ->permission() changes (Al Viro)
o Ready Remove dcache_lock (Maneesh Soni, IBM team)

o Beta file.h and INIT_TASK (Benjamin LaHaise)
o Beta Proper UFS fixes, ext2 and locking cleanups (Al Viro)
o Beta Lifting limitations on mount(2) (Al Viro)

o Started Killing kdev_t for block devices (Al Viro)
o Started Split up x86 setup.c into managable pieces (Dave Jones, Randy Dunlap)
o Started Reorder x86 initialization (Dave Jones, Randy Dunlap)

Have some free time and want to help? Check out the Kernel Janitor TO DO list for a
list of source code cleanups you can work on. A great place to start learning more
about kernel internals!



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