March 20, 2002

The latest status update for the 2.5 series is available at
http://kernelnewbies.org/status/ with links for each item.

Of note since last week is the merge of NAPI, which is a way to deal with high network packet load -- networking drivers authors may want to take a look at the porting guide. Also merged is a big ACPI patch, which should pave the way for better power management in Linux.

As usual, please let me know of anything incorrect or missing. Cheers,

-- Guillaume

------------------------------------------
Kernel 2.5 status - March 20th, 2002
(Latest kernel release is 2.5.7)

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 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)

o 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)
o in 2.5.5    Pagetables in highmem support                   (Ingo Molnar, 

Arjan van de Ven)
o in 2.5.5 New architecture: AMD 64-bit (x86-64) (Andi Kleen,
x86-64 Linux team)
o in 2.5.5 New architecture: PowerPC 64-bit (ppc64) (Anton
Blanchard, ppc64 team)

o in 2.5.6    Add JFS (Journaling FileSystem from IBM)        (JFS team)
o in 2.5.6    per_cpu infrastructure                          (Rusty 

Russell)
o in 2.5.6 HDLC (High-level Data Link Control) update (Krzysztof
Halasa)
o in 2.5.6 smbfs Unicode and large file support (Urban
Widmark)
o in 2.5.7 New driver API for Wireless Extensions (Jean
Tourrilhes)
o in 2.5.7 Video for Linux (V4L) redesign (Gerd Knorr)
o in 2.5.7 Futexes (Fast Lightweight Userspace Semaphores) (Rusty
Russell, etc.)
o in 2.5.7+ NAPI network interrupt mitigation (Jamal Hadi
Salim, Robert Olsson, Alexey Kuznetsov)
* in 2.5.7+ ACPI (Advanced Configuration & Power Interface) (Andy Grover,
ACPI team)

o Pending Finalize new device naming convention (Linus
Torvalds)
o in -dj Rewrite of the framebuffer layer (James
Simmons)

* in -ac      Strict address space accounting                 (Alan Cox)
* in -ac      PCMCIA Zoom video support                       (Alan Cox)

o Ready Add hardware sensors drivers (lm_sensors
team)

o Ready       New kernel config system: CML2                  (Eric Raymond)
o Ready       Read-Copy Update Mutual Exclusion               (Dipankar 

Sarma, Rusty Russell, Andrea Arcangeli, LSE Team)
o Ready Better event logging for enterprise systems (Larry
Kessler, evlog team)
o Ready New quota system supporting plugins (Jan Kara)

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        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, Robert Love, etc.)
o Beta        Build option for Linux Trace Toolkit (LTT)      (Karim 
Yaghmour)
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        Scalable CPU bitmasks                           (Russ Weight)
o Beta        Page table sharing                              (Daniel 

Phillips)
o Beta Rewrite of the console layer (James
Simmons)
o Beta ext2/ext3 online resize support (Andreas
Dilger)
o Beta Radix-tree pagecache (Momchil
Velikov, Christoph Hellwig)
o Beta Replace old NTFS driver with NTFS TNG driver (Anton
Altaparmakov)

o Beta        Fast walk dcache                                (Hanna Linder)
o Beta        Add User-Mode Linux (UML)                       (Jeff Dike)

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 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 Alpha       ext2/ext3 large directory support: HTree index  (Daniel 

Phillips, Christopher Li, Ted Ts'o)
o Alpha Delayed disk block allocation (Andrew
Morton)
* Alpha Improved i2o (Intelligent Input/Ouput) layer (Alan Cox)

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 in 2.5.6 Killing kdev_t for block devices (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 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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