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| The purpose of this page is tracking and explaining the features added in every release, just like the [http://wiki.dragonflybsd.org/index.php/DragonFly_Status Dragonfly people did]. | #pragma keywords Linux, Kernel, Operative System, Linus Torvalds, Open Source, drivers, filesystems, network, memory management, scheduler, preemtion, locking #pragma description Summary of the changes and new features merged in the Linux Kernel during the 2.6.x development |
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| It'd be nice if kernel hackers would spend some minutes adding their stuff here. The one place where you can find a comparable changelog are the fabulous LWN kernel articles: http://lwn.net/Kernel/, or the [http://lwn.net/Articles/driver-porting/ driver porting guide] - but there's no reason why the kernel community shouldn't embrace and extend those efforts ;) | List of the major changes done to each Linux kernel release. Other places to get news about the Linux kernel are [http://lwn.net/Kernel/ LWN kernel status], [http://lwn.net/Articles/2.6-kernel-api/ LWN list of API changes in 2.6], ["KernelPodcast"] or [http://www.lkml.org www.lkml.org]. List of changes of older releases can be found at Linux26Changes. If you're going to add something here look first at LinuxChangesRules! |
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| TODO: * Import relevant data from [http://www.codemonkey.org.uk/post-halloween-2.5.txt davej's post halloween document] * Keep track of what gets changed * Import [http://kernelnewbies.org/status/latest.html Kernelnewbies status] list (done - some "post-2.6.0" stuff perhaps) |
Discuss the latest Linux kernel changes on the [http://forum.kernelnewbies.org/list.php?4 Kernelnewbies web forum]. |
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| 2.6.14: 2.6.13: * x86 now uses the generic PCI bus setup code for assigning unassigned resources * [http://lwn.net/Articles/104343/ inotify] * Support for the Xtensa architecture: [http://www.tensilica.com/products/xtensa_architecture.htm 32-bit architecture] used in embedded devices * [http://lwn.net/Articles/108595/ kexec and kdump]: Kexec allows users to load a new kernel from another running kernel. By preserving the memory contents in a crash scenario, kexec allows to implement kdump. Kdump is able to get a memory dump of the previous kernel, and be used as a debugging tool. * [http://lwn.net/Articles/135472/ Execute-in-place support]: Traditionally, programs are loaded from disk to memory to be executed. However, the current wave of embedded devices store programs in a ROM/flash chip. XIP allows the kernel executing programs directly from that ROM, without being copied to RAM (saving RAM space), and bypassing the page cache/io scheduler layers (since they're not needed). * [http://lwn.net/Articles/145973/ build-time configurable clock interrupt frequency]: * [http://lwn.net/Articles/143474/ Improved CFQ IO scheduler] * Voluntary preemption patches * Removal of the devfs configuration option 2.6.12: * [http://lwn.net/Articles/140164/ API changes] * New driver for the "trusted computing" (TPM) crap^Wchip * [http://www.superh.com/products/shyway.htm SuperHyway bus support] * Multilevel security implementation for SELinux * [http://lwn.net/Articles/124703/ device mapper multipath support] * [http://lwn.net/Articles/121845/ Address space randomization] * Restore the Philips webcam driver * I/O barrier support for serial ATA drives * [http://lwn.net/Articles/134460/ "resource limits"] * [http://lwn.net/Articles/127936/ cpusets] * Remove IPV6 "experimental" status 2.6.11: 2.6.10: 2.6.9: 2.6.8: 2.6.7: 2.6.6: * [http://lwn.net/Articles/80472/ full object-based reverse-mapping scheme and removal of the per-page PTE chains] * Network packet timestamping optimization * [http://www.geocities.com/wronski12/posix_ipc/index.html POSIX message queues] * Message queues for the x86_64 and s390 architectures * fsync() and fdatasync() speed improvements to ext2/3 * [http://lwn.net/Articles/77190/ addition of the fcntl() method to the file_operations structure] * [http://lwn.net/Articles/65437/ "Laptop Mode"] * 4KB kernel stacks option for the i386 architecture * Non-executable stack support for several architectures * Reiserfs updates: data=ordered support, space preallocation, laptop mode support * IPv6 support in SELinux * [http://lwn.net/Articles/79326/ The lightweight auditing framework] * A mechanism which allows block drivers to respond to queries about the congestion state of their queues * [http://lwn.net/Articles/75233/ "per-device unplugging patch"] * CFQ scheduler * External module support 2.6.5: * Netpoll infrastructure 2.6.4: * HFS rewrite 2.6.3: 2.6.2: 2.6.1: 2.6.0: 2.6.0-test9: * [http://lwn.net/Articles/44243/ libata driver architecture] 2.6.0-test6: * [http://marc.theaimsgroup.com/?l=linux-kernel&m=104344596912094&w=2 32-bit dev_t] 2.6.0-test3: * [http://www.nsa.gov/selinux/index.html SELinux] 2.6.0-test1: * [http://www.linuxvirtualserver.org/ Linux Virtual Server layer] 2.5.75: * [http://marc.theaimsgroup.com/?l=linux-mm&m=104529418208788&w=2 Anticipatory Scheduler] 2.5.74: 2.5.73: 2.5.72: 2.5.71: * [http://marc.theaimsgroup.com/?l=linux-kernel&m=104981044405395&w=2 Switch the IDE I/O layers to taskfile] 2.5.70: * [http://www.linux-usb.org/gadget USB gadget support] 2.5.69: * [http://lwn.net/Articles/29555/ New interrupt handling API] 2.5.68: 2.5.67: 2.5.66: 2.5.65: * [http://www.kerneltrap.org/node.php?id=603 Desktop Interactivity Improvements] 2.5.64: 2.5.63: * [http://high-res-timers.sourceforge.net/ POSIX timers] 2.5.62: * [http://lse.sourceforge.net/locking/dcache/dcache_lock.html Avoid dcache_lock while path walking] 2.5.61: 2.5.60: * New modversions implementation * 64-bit jiffies 2.5.59: * [http://home.arcor.de/efocht/sched/ NUMA aware scheduler extensions] 2.5.68: 2.5.57: * [http://www.zipworld.com.au/~akpm/linux/schedlat.html Remove long-held locks for low scheduling latency] 2.5.56: 2.5.55: 2.5.54: * [http://secure.netroedge.com/~lm78/ Add lm-sensors drivers for hardware health monitoring] * Support for AGP 3.0 2.5.53: * "sysenter" support 2.5.52: 2.5.51: * [http://linuxconsole.sourceforge.net/ Rewrite of the console layer] * Compatibility syscall layer 2.5.50: 2.5.49: 2.5.48: * [http://lists.insecure.org/lists/linux-kernel/2002/Oct/6214.html In-kernel module loader] 2.5.47: * [http://www.uwsg.iu.edu/hypermail/linux/kernel/0204.1/0429.html Zerocopy NFS] 2.5.46: * [http://www.xmailserver.org/linux-patches/nio-improve.html Better I/O performance with epoll] * Per-cpu hot & cold page lists * [http://lists.insecure.org/lists/linux-kernel/2002/Oct/7027.html MMU-less processor support (ucLinux)] * [http://marc.theaimsgroup.com/?l=linux-kernel&m=101095500820185&w=2 Replace initrd by initramfs] * Extended Attributes and ACLs for ext2/ext3 2.5.45: * [http://www.xs4all.nl/~zippel/lc/ New Linux configuration system: kconfig] * [http://samba.org/~jamesm/crypto/ CryptoAPI] * [ftp://ftp.linux-ipv6.org/pub/usagi/patch/ipsec/ IPSEC] * [http://www.linuxtv.org/dvb/ Digital Video Broadcasting (DVB) layer] * [http://www.sistina.com/products_lvm.htm Device mapper for Logical Volume Manager (LVM2)] 2.5.44: * New sysfs filesystem (formerly known as driverfs) * Plug'N Play Layer Rewrite * [http://lwn.net/Articles/9042/ x86 BIOS Enhanced Disk Device (EDD) polling] 2.5.43: * [http://www.psc.edu/general/filesys/afs/ Andrew File System (AFS) support] * [http://oprofile.sourceforge.net/ OProfile, a low-overhead profiler] * [http://lse.sourceforge.net/locking Read-Copy Update (RCU) Mutual Exclusion] * [http://www.citi.umich.edu/projects/nfsv4/ Add support for NFS v4] * Remove kiobufs 2.5.42: * [http://marc.theaimsgroup.com/?l=linux-kernel&m=103298446916066&w=2 ext2/ext3 large directory support: HTree index] * [http://us1.samba.org/samba/Linux_CIFS_client.html Add new CIFS (Common Internet File System)] * [http://www.gelato.unsw.edu.au/ Remove the 2TB block device limit] * Improved i2o (Intelligent Input/Ouput) layer 2.5.41: 2.5.40: * [http://lse.sourceforge.net/numa Parallelizing page replacement] * [http://lse.sourceforge.net/numa NUMA topology support * [http://www.brodo.de/cpufreq/ Add support for CPU clock/voltage scaling] 2.5.39: * New IO scheduler ("deadline") 2.5.38: 2.5.37: * [http://users.pandora.be/bart.de.schuymer/ebtables/ Ethernet bridge tables support] * Remove the global tasklist 2.5.36: * Hugepage support * [http://oss.sgi.com/projects/xfs/ XFS filesystem from SGI] 2.5.35: * Serial ATA support * [http://user-mode-linux.sourceforge.net/index.html Add User-Mode Linux (UML)] 2.5.34: * POSIX threading support for signals * [http://lse.sourceforge.net/numa discontigmem support (ia32)] 2.5.33: * TCP segmentation offload * [http://www.sf.net/projects/lksctp SCTP (Stream Control Transmission Protocol)] 2.5.32: * [http://people.redhat.com/drepper/nptl-design.pdf Improved POSIX threading support] * [http://freshmeat.net/projects/linux-aio/ Asynchronous IO (aio) support] * Porting all input devices over to input API * New MTRR (Memory Type Range Register) driver 2.5.31: * Support insane number of processes * Disk description cleanups * Remove incomplete SPX network stack 2.5.30: * Remove khttpd 2.5.29: * Strict address space accounting * [http://lsm.immunix.org/ Add Linux Security Module (LSM)] * [http://people.redhat.com/mingo/tls-patches/ Thread-Local Storage (TLS) support] 2.5.28: * Remove the "Big IRQ lock" * Serial driver restructure 2.5.27: * [http://surriel.com/patches/ New VM with reverse mappings] 2.5.26: * Direct pagecache <-> BIO disk I/O 2.5.25: * [http://www.uwsg.iu.edu/hypermail/linux/kernel/0207.0/0741.html Faster internal kernel clock frequency] * Unified naming for disk devices 2.5.24: 2.5.23: * [http://www.kernel.org/pub/linux/kernel/people/rusty/patches/Hotcpu/ Hotplug CPU support] * [http://bazar.conectiva.com.br/~acme/patches/wip More complete IEEE 802.2 stack] 2.5.22: 2.5.21: 2.5.20: 2.5.19: 2.5.18: * [http://falcon.sch.bme.hu/~seasons/linux/swsusp.html Software suspend (to disk & RAM)] * ->getattr() ->setattr() ->permission() changes 2.5.17: * Move ISDN4Linux to CAPI based interface * [http://marc.theaimsgroup.com/?l=linux-fsdevel&m=101586205801483&w=2 New quota system supporting plugins] 2.5.16: 2.5.15: 2.5.14: * Bluetooth support (no longer experimental!) * [http://www.uwsg.iu.edu/hypermail/linux/kernel/0204.1/1250.html Support for IDE TCQ (Tagged Command Queueing)] 2.5.13: 2.5.12: * Rewrite of the buffer layer 2.5.11: * Rewrite of the framebuffer layer * [http://www.ussg.iu.edu/hypermail/linux/kernel/0204.3/0129.html Fast walk dcache] * [http://linux-ntfs.sourceforge.net/ Replace old NTFS driver with NTFS TNG driver] 2.5.10: 2.5.9: * Smarter IRQ balancing 2.5.8: * [http://www.uwsg.iu.edu/hypermail/linux/kernel/0204.1/0215.html Radix-tree pagecache] * [http://www.kernel.org/pub/linux/kernel/people/rml/cpu-affinity Syscall interface for CPU task affinity] 2.5.7: * [http://sourceforge.net/projects/acpi/ ACPI (Advanced Configuration & Power Interface)] * [ftp://robur.slu.se/pub/Linux/net-development/NAPI/ NAPI network interrupt mitigation] * [http://www.uwsg.iu.edu/hypermail/linux/kernel/0203.0/0884.html Futexes (Fast Lightweight Userspace Semaphores] * [http://www.uwsg.iu.edu/hypermail/linux/kernel/0203.0/0335.html Video for Linux (V4L) redesign] * [http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/Tools.html New driver API for Wireless Extensions] 2.5.6: * [http://www.hojdpunkten.ac.se/054/samba/ http://www.hojdpunkten.ac.se/054/samba/] * [http://www.cs.helsinki.fi/linux/linux-kernel/2002-01/0438.html HDLC (High-level Data Link Control) update] * [http://www.uwsg.iu.edu/hypermail/linux/kernel/0202.2/0920.html per_cpu infrastructure] * [http://www-124.ibm.com/jfs/ Add JFS (Journaling FileSystem from IBM)] * Killing kdev_t for block devices 2.5.5: * [http://linuxppc64.org/ New architecture: PowerPC 64-bit (ppc64)] * [http://www.x86-64.org/ New architecture: AMD 64-bit (x86-64)] * [http://www.uwsg.iu.edu/hypermail/linux/kernel/0202.2/0297.html Pagetables in highmem support] * [http://www.alsa-project.org/ Add ALSA (Advanced Linux Sound Architecture] 2.5.4: * [http://www-124.ibm.com/developerworks/oss/pthreads/ Support for Next Generation POSIX Threading] * [ftp://ftp.kernel.org/pub/linux/kernel/people/rml/preempt-kernel/ Add preempt kernel option] * Per network protocol slabcache & sock.h * [http://marc.theaimsgroup.com/?l=linux-kernel&m=100942323913586&w=2 Per filesystem slabcache & fs.h] 2.5.3: * [http://kernel.org/pub/linux/kernel/people/mochel/doc/ New driver model & unified device tree] * [http://www.uwsg.iu.edu/hypermail/linux/kernel/0109.3/1341.html PnP BIOS driver] * [http://www.geocrawler.com/mail/msg.php3?msg_id=7686796&list=35 Generic Extended Attribute support] * [http://marc.theaimsgroup.com/?l=linux-kernel&m=101077476005939&w=2 Support reiserfs external journal] * [http://marc.theaimsgroup.com/?l=linux-kernel&m=101121711408999&w=2 IDE layer update] * [http://www.uwsg.iu.edu/hypermail/linux/kernel/0202.0/0260.html Untangle sched.h & fs.h include dependancies] * [http://www.geocrawler.com/lists/3/Linux/35/100/7642826/ Break Configure.help into multiple files] 2.5.2: * [http://marc.theaimsgroup.com/?l=linux-kernel&m=100992347220716&w=2 New kernel device structure (kdev_t)] * [http://people.redhat.com/mingo/O(1)-scheduler/ O(1) scheduler for improved scalability] * [http://marc.theaimsgroup.com/?l=linux-fsdevel&m=98307457705210&w=2 Filesystem per-process namespaces, late-boot cleanups] * [http://www.linux-usb.org/usb2.html Initial support for USB 2.0] 2.5.1: * Rewrite of the block IO (bio) layer |
[[Include(Linux_3.4)]] |
List of the major changes done to each Linux kernel release. Other places to get news about the Linux kernel are [http://lwn.net/Kernel/ LWN kernel status], [http://lwn.net/Articles/2.6-kernel-api/ LWN list of API changes in 2.6], ["KernelPodcast"] or [http://www.lkml.org www.lkml.org]. List of changes of older releases can be found at Linux26Changes. If you're going to add something here look first at LinuxChangesRules!
Discuss the latest Linux kernel changes on the [http://forum.kernelnewbies.org/list.php?4 Kernelnewbies web forum].