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Subject[STATUS 2.5] May 1, 2002
This week's status update is available at the usual place:

A couple items have been merged since last week, including the
new NTFS driver, the fast walk dcache patch, the start of the
new framebuffer layer, as well as some more delayed disk block
allocation bits.

There has also been a lot of work done by various people to
remove the BKL from many places, which leads to my question:
does anyone has a URL with a list of all the places where the
BKL should eventually be removed and who's working on it?

It seems like it would be most useful if someone was willing
to maintain something like this, but it might be a lot of
work - I don't know how long the list would be...

Anyway, as usual, if I missed anything, let me know!

-- Guillaume

Kernel 2.5 status - May 1st, 2002
(Latest kernel release is 2.5.12)


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
o in 2.5.3 Support reiserfs external journal (Reiserfs
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
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 2.5.5+ IDE subsystem major cleanup (Martin
Dalecki, Vojtech Pavlik)
o in 2.5.6 Add JFS (Journaling FileSystem from IBM) (JFS team)
o in 2.5.6 per_cpu infrastructure (Rusty
o in 2.5.6 HDLC (High-level Data Link Control) update (Krzysztof
o in 2.5.6 smbfs Unicode and large file support (Urban
o in 2.5.7 New driver API for Wireless Extensions (Jean
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)
o in 2.5.7+ ACPI (Advanced Configuration & Power Interface) (Andy Grover,
ACPI team)
o in 2.5.8 Syscall interface for CPU task affinity (Robert Love)
o in 2.5.8 Radix-tree pagecache (Momchil
Velikov, Christoph Hellwig)
o in 2.5.8+ Delayed disk block allocation (Andrew
o in 2.5.9 Smarter IRQ balancing (Ingo Molnar)
o in 2.5.11 Replace old NTFS driver with NTFS TNG driver (Anton
o in 2.5.11 Fast walk dcache (Hanna Linder)
o in 2.5.11+ Rewrite of the framebuffer layer (James

o in -dj Rewrite of the console layer (James
o in -ac Strict address space accounting (Alan Cox)
o in -ac PCMCIA Zoom video support (Alan Cox)
o in -ac More complete IEEE 802.2 stack (Arnaldo, Jay
Schullist, from Procom donated code)

o Ready Better event logging for enterprise systems (Larry
Kessler, evlog team)
o Ready New quota system supporting plugins (Jan Kara)
o Ready Linux booting ELF images (Eric
o Ready First pass at LinuxBIOS support (Eric
o Ready Build option for Linux Trace Toolkit (LTT) (Karim

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 Add Linux Security Module (LSM) (LSM team)
o Beta Hotplug CPU support (Rusty
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 Dynamic Probes (Suparna
Bhattacharya, dprobes team)
o Beta Scalable CPU bitmasks (Russ Weight)
o Beta Page table sharing (Daniel
o Beta ext2/ext3 online resize support (Andreas
o Beta Add User-Mode Linux (UML) (Jeff Dike)
o Beta UDF Write support for CD-R/RW (packet writing) (Jens Axboe,
Peter Osterlund)
o Beta Add hardware sensors drivers (lm_sensors
o Beta New kernel config system: CML2 (Eric Raymond)
o Beta Read-Copy Update Mutual Exclusion (Dipankar
Sarma, Rusty Russell, Andrea Arcangeli, LSE Team)
o Beta USB device (not host) support (Stuart
Lynne, Greg Kroah-Hartman)
o Beta Support for IDE TCQ (Tagged Command Queueing) (Jens Axboe)

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 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
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 Improved i2o (Intelligent Input/Ouput) layer (Alan Cox)
o Alpha New MTRR (Memory Type Range Register) driver (Patrick
o Alpha Remove use of the BKL (Big Kernel Lock) (Alan Cox,
Robert Love, Neil Brown, Dave Hansen, etc.)
o Alpha Zerocopy NFS (Hirokazu

o Started More complete NetBEUI stack (Arnaldo
Carvalho de Melo, from Procom donated code)
o Started Change all drivers to new driver model (All
o Started Reiserfs v4 (Reiserfs
o Started Move ISDN4Linux to CAPI based interface (ISDN4Linux

o Draft #2 New lightweight library (klibc) (Greg Kroah-
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,
o Planning Generic parameter/command line interface (Keith Owens)
o Planning New mount API (Al Viro)
o Planning Implement new device naming convention (Device
naming team)


o in 2.5.3 Break into multiple files (Linus
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 Beta file.h and INIT_TASK (Benjamin
o Beta Proper UFS fixes, ext2 and locking cleanups (Al Viro)
o Beta Lifting limitations on mount(2) (Al Viro)
o Beta Remove dcache_lock (Maneesh
Soni, IBM team)

o Alpha Split up x86 setup.c into managable pieces (Patrick

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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