WORK IN PROGRESS

Summary: Linux 2.6.35

This page contains details about the main features included in the kernel core and the main subsystems. For details on architecture-specific changes and driver changes, check the page [wiki:Linux_2_6_35-DriversArch Linux_2_6_35-DriversArch]

TableOfContents()

1. Prominent features (the cool stuff)

1.1. Transparent spreading of incoming network traffic load across CPUs

Recommended LWN articles: [http://lwn.net/Articles/362339/ "Receive packet steering"] and [http://lwn.net/Articles/382428/ "Receive flow steering"]

Network cards have improved the bandwith to the point where it's hard for a single modern CPU to keep up. Two new features contributed by Google aim to spread the load of network handling across the CPUs available in the system: Receive Packet Steering (RPS) and Receive Flow Steering (RFS).

RPS distributes the load of received packet processing across multiple CPUs. This solution allows protocol processing (e.g. IP and TCP) to be performed on packets in parallel (contrary to the previous code). For each device (or each receive queue in a multi-queue device) a hashing of the packet header is used to index into a mask of CPUs and decide which CPU will be used to process a packet. There are also heuristics provided by RFS code, which is a natural extension of RPS, and instead of randomly choosing the CPU from a hash, it tries to use the CPU where the application running the recvmsg() syscall is being run, to maximize cache hits. This effectively emulates what a multi-queue NIC can provide, but in software and for all kind of hardware.

Benchmarks of 500 instances of netperf TCP_RR test with 1 byte request and response show the potential benefit of this feature, a e1000e network card on 8 core Intel server goes from 104K tps at 30% CPU usage, to 303K tps at 61% CPU usage when using RPS+RFS. A RPC test which is similar in structure to the netperf RR test with 100 threads on each host, but doing more work in userspace that netperf, goes from 103K tps at 48% of CPU utilization to 223K at 73% CPU utilization and much lower latency.

Code: [http://git.kernel.org/linus/0a9627f2649a02bea165cfd529d7bcb625c2fcad (commit 1], [http://git.kernel.org/linus/df3345457a7a174dfb5872a070af80d456985038 2], [http://git.kernel.org/linus/fec5e652e58fa6017b2c9e06466cb2a6538de5b4 3)]

1.2. Btrfs improvements

• Direct I/O support: Direct I/O is a technique used to bypass the filesystem cache. This harms performance, but it's widely used by high performance software like some databases, which like to implement their own cache. Code: [http://git.kernel.org/linus/4b46fce23349bfca781a32e2707a18328ca5ae22 (commit)]

• Complete -ENOSPC support: Linux 2.6.32 already added reliable -ENOSPC support for common filesystem usage, but some corner cases hit by volume management operations were not handled. The -ENOSPC code added in this version handles all difficult corner cases like space balancing, drive management, fsync logging and many others. Code: [http://git.kernel.org/linus/b742bb82f1676d50103ade0ba89bfb79debabe73 (commit 1], [http://git.kernel.org/linus/424499dbd0c4d88742bf581b5714b27fb44b9fef 2], [http://git.kernel.org/linus/5da9d01b66458b180a6bee0e637a1d0a3effc622 3], [http://git.kernel.org/linus/f0486c68e4bd9a06a5904d3eeb3a0d73a83befb8 4], [http://git.kernel.org/linus/a22285a6a32390195235171b89d157ed1a1fe932 5], [http://git.kernel.org/linus/0ca1f7ceb1991099ed5273885ebcf4323948c72e 6], [http://git.kernel.org/linus/8929ecfa50f266163832eeacfbc3642ed5eb83b6 7], [http://git.kernel.org/linus/d68fc57b7e3245cfacf2e3b47acfed1946a11786 8], [http://git.kernel.org/linus/4a500fd178c89b96fa166a2d9e7855df33429841 9], [http://git.kernel.org/linus/3fd0a5585eb98e074fb9934549c8d85c49756c0d 10] ,[http://git.kernel.org/linus/efa56464562991b8c24f965199888806bd8c4b38 11)]

1.3. XFS Delayed logging

• This version adds a logging (journaling) mode called delayed logging, which is very briefly modeled after the journaling mode in the ext3/4 and reiserfs filesystems. It allows to accumulated multiple asynchronous transactions in memory instead of possibly writing them out many times. The I/O bandwidth used for the log decreases by orders of magnitude and performance on metadata intensive workloads increases massively. The log disk format is not changed, only the in-memory data structures and code. This feature is experimental, so it's not recommended for final users or production servers. Those who want to test it can enable it with the "-o delaylog" mount option. Code: [http://git.kernel.org/linus/a9a745daadab26f13884ff26a50fa38247c11ce9 (commit 1], [http://git.kernel.org/linus/71e330b593905e40d6c5afa824d38ee02d70ce5f 2)]

1.4. perf improvements

• 'perf kvm' tool for monitoring guest performance from host [http://git.kernel.org/linus/a1645ce12adb6c9cc9e19d7695466204e3f017fe (commit)]

• perf probe: Support accessing members in the data structures. With this, perf-probe accepts data-structure members (IOW, it now accepts dot '.' and arrow '->' operators) as probe arguments e.g. "perf probe --add 'schedule:44 rq->curr'" or "perf probe --add 'vfs_read file->f_op->read file->f_path.dentry'" [http://git.kernel.org/linus/7df2f32956cf0f1a45df38cd0e0fe0c3467580e8 (commit)]

• Improve --list to show current exist probes with line number and file name. This enables user easily to check which line is already probed. Code: [http://git.kernel.org/linus/fb1587d869a399554220e166d4b90b581a8ade01 (commit)]. For example:

  • /perf probe --list

    probe:vfs_read (on vfs_read:8@linux-2.6-tip/fs/read_write.c)

• Implement a console UI using newt [http://git.kernel.org/linus/f9224c5c944b60cf709db4adf1f5195264b8d194 (commit)], [http://git.kernel.org/linus/46e3e055ce69a00d735e458445ab1d24718ff751 (commit)]

• Perf probe: add --dry-run option [http://git.kernel.org/linus/f4d7da499e4fc1fdff8f26fdeb1a058d475a7a6c (commit)], add --max-probes option [http://git.kernel.org/linus/ef4a356574426877d569f8b6579325537eb7909b (commit)]

1.5. Graphic improvements

This version carries a bunch of interesting improvements to the graphics stack.

• Core DRM code: polling support for when nothing is connected [http://git.kernel.org/linus/5c4426a782bc9509573fc7958a786ebd14fafdf3 (commit)]

• i915: Support for H.264 and VC1 hardware acceleration on G45+ [http://git.kernel.org/linus/d1b851fc0d105caa6b6e3e7c92d2987dfb52cbe0 (commit)], support for the graphics in the future Intel Cougarpoint chipset [http://git.kernel.org/linus/3bad0781832e4e8c9a532f1169bfcd7257bcfd9e (commit 1], [http://git.kernel.org/linus/8db9d77b1b14fd730561f64beea8c00e4478d7c5 2], [http://git.kernel.org/linus/0f229062a13204120dcd23168ad008e559bb1376 4], [http://git.kernel.org/linus/b3b095b3b2b052f3c665b0d9e3e551fb65062db3 5], [http://git.kernel.org/linus/e3421a189447c0b8cd0aff5c299f53b5ab7c38f6 6], [http://git.kernel.org/linus/14571b4c1ac9c109f5d6d6e95cfdb92339151fe0 7], [http://git.kernel.org/linus/461ed3caee9b615393eb5beb9a8148d230354b41 8)], power monitoring support [http://git.kernel.org/linus/7648fa99eb77a2e1a90b7beaa420e07d819b9c11 (commit)], support of memory self-refresh on Ironlake [http://git.kernel.org/linus/7f8a85698f5c8a981641ec0bdf9926768786db9d (commit)] and support for interlaced display [http://git.kernel.org/linus/734b4157b367d66405f7dab80085d17c9c8dd3b5 (commit)]

• Radeon: Initial power management support [http://git.kernel.org/linus/2031f77ca9c17133869b265210418959a909d259 (commit 1], [http://git.kernel.org/linus/a424816fb37f894a37585cf86dfdd6b8b1dc681f 2], [http://git.kernel.org/linus/78930b1c39dd4a5afd5aa873eec11b5bd7079866 3], [http://git.kernel.org/linus/536fcd5124df6af3b95f1bffc925d9ccb6d5b9df 4)], simplification and improvement of the GPU reset handling [http://git.kernel.org/linus/225758d8ba4fdcc1e8c9cf617fd89529bd4a9596 (commit 1], [http://git.kernel.org/linus/90aca4d2740255bd130ea71a91530b9920c70abe 2)], implement several important pieces needed to support the Evergreen harware [http://git.kernel.org/linus/49f6598277635af13d60e7d2601963356bc48bd8 (commit 1], [http://git.kernel.org/linus/08c5c51507614ffd6fee8f3517c33ac5e1576e82 2], [http://git.kernel.org/linus/0fcdb61e78050f8f0b31029eeafa5ae013ce0f35 3], [http://git.kernel.org/linus/747943ea187e5acceb7ffc762ff2c84cb3449745 4], [http://git.kernel.org/linus/32fcdbf4084544c3d8fa413004d57e5dc6f2eefe 5], [http://git.kernel.org/linus/fe251e2fffa1ebc17c8e6e895b0374ae4e732fa5 6], [http://git.kernel.org/linus/45f9a39bedc3afab3fc85567792efc0103f34a55 7], [http://git.kernel.org/linus/0ca2ab52d451c25764e53d3d289e1be357c977d7 8], [http://git.kernel.org/linus/cb5fcbd540b438a5d311bd15dc910841d01ed140 9], [http://git.kernel.org/linus/7ac9aa5a1f1b87adb69bcbec2b89e228f074103a 10], [http://git.kernel.org/linus/9349d5cc920c10845693f906ebd67f394f1d0d04 11)], and enable use of unmappable VRAM [http://git.kernel.org/linus/6b8b1786a8c29ce6e32298b93ac8d4a18a2b11c4 (commit)]

1.6. Support for multiple multicast route tables

Normally, a multicast router runs a userspace daemon and decides what to do with a multicast packet based on the source and destination addresses. This feature adds support for multiple independant multicast routing instances, so the kernel is able to take interfaces and packet marks into account and run multiple instances of userspace daemons simultaneously, each one handling a single table. Code: [http://git.kernel.org/linus/f0ad0860d01e47a3ffd220564c5c653b3afbe962 (commit)], [http://git.kernel.org/linus/d1db275dd3f6e4182c4c4b4a1ac6287925d60569 (commit)], [http://git.kernel.org/linus/5b285cac3570a935aaa28312c1ea28f9e01c5452 (commit)]

1.7. L2TP Version 3 (RFC 3931) support

This version adds support for Layer 2 Tunneling Protocol (L2TP) version 3, [http://www.ietf.org/rfc/rfc3931.txt RFC 3931]. L2TP provides a dynamic mechanism for tunneling Layer 2 (L2) "circuits" across a packet-oriented data network (e.g., over IP). L2TP, as originally defined in RFC 2661, is a standard method for tunneling Point-to-Point Protocol (PPP) [RFC1661] sessions. L2TP has since been adopted for tunneling a number of other L2 protocols, including ATM, Frame Relay, HDLC and even raw ethernet frames, this is the version 3. Code: [http://git.kernel.org/linus/f7faffa3ff8ef6ae712ef16312b8a2aa7a1c95fe (commit)], [http://git.kernel.org/linus/e0d4435f93905f517003cfa7328a36ea19788147 (commit)], [http://git.kernel.org/linus/0d76751fad7739014485ba5bd388d4f1b4fd4143 (commit)], [http://git.kernel.org/linus/789a4a2c61d843df67988d69e7c3f3a4bca97e8e (commit)]

1.8. CAIF Protocol support

Support for the CAIF protocol. CAIF is a MUX protocol used by ST-Ericsson cellular modems for communication between Modem and host. The host processes can open virtual AT channels, initiate GPRS Data connections, Video channels and Utility Channels. The Utility Channels are general purpose pipes between modem and host. ST-Ericsson modems support a number of transports between modem and host. Currently, UART and Loopback are available for Linux [http://git.kernel.org/linus/70596b612c04694806a31dd389bd796c035085fa (commit 1], [http://git.kernel.org/linus/09009f30de188c847d72039e6250bfea56a0f887 2], [http://git.kernel.org/linus/f671c54207d8a47129f35a84569fdfda614d2439 3], [http://git.kernel.org/linus/2721c5b9dd2a56a9710021c00146bb26ba8dd7b3 4], [http://git.kernel.org/linus/b482cd2053e3b90a7b33a78c63cdb6badf2ec383 5], [http://git.kernel.org/linus/15c9ac0c80e390df09ce5730a7b08b13e07a8dd5 6], [http://git.kernel.org/linus/c72dfae2f77620e5b3fcee1beeee7e536a42b2ad 7], [http://git.kernel.org/linus/e6f95ec8db312491235b4f06343fbd991a82ce20 8], [http://git.kernel.org/linus/cc36a070b5901cd54386348b4d79d2daac91ce75 9], [http://git.kernel.org/linus/3908c6902372206cc582ecf459af889b09a150c9 10], [http://git.kernel.org/linus/edc7616c307ad315159a8aa050142237f524e079 11], [http://git.kernel.org/linus/9b27105b4a44c54bf91ecd7d0315034ae75684f7 12)]

1.9. ACPI Platform Error Interface support

Support for the ACPI Platform Error Interface (APEI). This improves NMI handling especially. In addition it supports the APEI Error Record Serialization Table (ERST), the APEI Generic Hardware Error Source and APEI Error INJection (EINJ) and saving of MCE (Machine Check Exception) errors into flash. For more information about APEI, please refer to [http://www.acpi.info/DOWNLOADS/ACPIspec40a.pdf ACPI Specification version 4.0], chapter 17. Code: [http://git.kernel.org/linus/15651291a2f8c11e7e6a42d8bfde7a213ff13262 (commit 1], [http://git.kernel.org/linus/a643ce207f3e70030bdb431e2a363cc111a60c1a 2], [http://git.kernel.org/linus/9dc966641677795f4d6b0a9ba630d6a3a3e24a57 3], [http://git.kernel.org/linus/ea8c071cad789b1919355fc7a67182a5c9994e6b 4], [http://git.kernel.org/linus/e40213450b53157967a1f83eda50e9a941c13a08 5], [http://git.kernel.org/linus/affb72c3a8984ba55e055b0a0228c3ea1a056758 6], [http://git.kernel.org/linus/801eab8118f61255d8e2be35939c572042618742 7], [http://git.kernel.org/linus/fab1c23242528771a955c475ef23d99156a71a7f 8], [http://git.kernel.org/linus/d334a49113a4a33109fd24e46073280ecd1bea0d 9], [http://git.kernel.org/linus/06d65deade9aabba58e0518df86dcd324e86b832 10], [http://git.kernel.org/linus/a08f82d08053fb6e3aa3635c2c26456d96337c8b 11], [http://git.kernel.org/linus/482908b49ebfa453dd0455910c951c750567c05d 12], [http://git.kernel.org/linus/6e320ec1d98f9eb93d5b2a5d70e2f40dce923f1b 13)]

2. CPU scheduler

• The following features have no use today and are being removed: AFFINE_WAKEUPS [http://git.kernel.org/linus/beac4c7e4a1cc6d57801f690e5e82fa2c9c245c8 (commit)], ASYM_GRAN [http://git.kernel.org/linus/13814d42e45dfbe845a0bbe5184565d9236896ae (commit)], avg_overlap [http://git.kernel.org/linus/e12f31d3e5d36328c7fbd0fce40a95e70b59152c (commit)], avg_wakeup [http://git.kernel.org/linus/b42e0c41a422a212ddea0666d5a3a0e3c35206db (commit)], FAIR_SLEEPERS feature [http://git.kernel.org/linus/5ca9880c6f4ba4c84b517bc2fed5366adf63d191 (commit)], NORMALIZED_SLEEPER [http://git.kernel.org/linus/6bc6cf2b61336ed0c55a615eb4c0c8ed5daf3f08 (commit)], SYNC_WAKEUPS feature [http://git.kernel.org/linus/c6ee36c423c3ed1fb86bb3eabba9fc256a300d16 (commit)], WAKEUP_SYNC feature [http://git.kernel.org/linus/f2e74eeac03ffb779d64b66a643c5e598145a28b (commit)]

• Tweak sched_latency and min_granularity, speeds up a tiny bit tbench [http://git.kernel.org/linus/21406928afe43f1db6acab4931bb8c886f4d04ce (commit)]

• Rate-limit nohz [http://git.kernel.org/linus/39c0cbe2150cbd848a25ba6cdb271d1ad46818ad (commit)]

• sysfs: Implement sysfs tagged directory support. [http://git.kernel.org/linus/3ff195b011d7decf501a4d55aeed312731094796 (commit)]

3. Filesystems

• OCFS2

  • Implement allocation reservations [http://git.kernel.org/linus/d02f00cc057809d96c044cc72d5b9809d59f7d49 (commit)], [http://git.kernel.org/linus/4fe370afaae49c57619bb0bedb75de7e7c168308 (commit)], [http://git.kernel.org/linus/e3b4a97dbe9741a3227c3ed857a0632532fcd386 (commit)], [http://git.kernel.org/linus/6b82021b9e91cd689fdffadbcdb9a42597bbe764 (commit)], [http://git.kernel.org/linus/83f92318fa33cc084e14e64dc903e605f75884c1 (commit)],

  • Optimize punching-hole code. [http://git.kernel.org/linus/c1631d4a484fbb498e35d661f1aebd64c86b66bf (commit)]

  • Discontiguous block groups. [http://git.kernel.org/linus/798db35f4649eac2778381c390ed7d12de9ec767 (commit)], [http://git.kernel.org/linus/4cbe4249d6586d5d88ef271e07302407a14c8443 (commit)], [http://git.kernel.org/linus/1a934c3e57594588c373aea858e4593cdfcba4f4 (commit)]

  • Make nointr a default mount option [http://git.kernel.org/linus/4b37fcb7d41ce3b9264b9562d6ffd62db9294bd1 (commit)]

• Squashfs: XATTR support [http://git.kernel.org/linus/67f66cc6c728de183d9d43c243cb163c1ebd8e04 (commit)], [http://git.kernel.org/linus/f41d207cbedecd82f797adcce83890aa96f1c9e9 (commit)], [http://git.kernel.org/linus/4b5397dc24ab12afaac85be3d0863b7f6eb8b0f0 (commit)], [http://git.kernel.org/linus/01e5b4e4e897fce8c7e6236bc933c9721c7ee237 (commit)]

• Ext2: Remove BKL from ext2 filesystem [http://git.kernel.org/linus/e0a5cbac029db69032758000c67465c2ed7a5736 (commit)]

• Ext4: check for a good block group before loading buddy pages [http://git.kernel.org/linus/8a57d9d61a6e361c7bb159dda797672c1df1a691 (commit)]

• UFS: permit mounting of Borderware filesystems [http://git.kernel.org/linus/d27d7a9a7838587fcdcc6f2b042f5610eb4984a1 (commit)]

• NILFS2: change default of 'errors' mount option to 'remount-ro' mode [http://git.kernel.org/linus/277a6a34175dcb0ee98dceee619e0e3190347a25 (commit)]

4. Networking

• L2TP (Layer 2 Tunneling Protocol)

  • Add netlink control API for L2TP [http://git.kernel.org/linus/309795f4bec2d69cd507a631f82065c2198a0825 (commit)]

  • Add L2TP ethernet pseudowire support [http://git.kernel.org/linus/d9e31d17ceba5f0736f5a34bbc236239cd42b420 (commit)]

  • Add debugfs files for dumping l2tp debug info [http://git.kernel.org/linus/0ad6614048cf722e4d27909665b4846805357f1b (commit)]

• IPv6

  • Add GSO support on forwarding path [http://git.kernel.org/linus/0aa68271510ae2b221d4b60892103837be63afe4 (commit)]

  • Complete IPV6_DONTFRAG support [http://git.kernel.org/linus/4b340ae20d0e2366792abe70f46629e576adaf5e (commit)]

  • Convert addrconf hash list to RCU [http://git.kernel.org/linus/5c578aedcb21d79eeb4e9cf04ca5b276ac82614c (commit)]

  • Add support for the Generic TTL security mechanism ([http://tools.ietf.org/html/rfc5082 RFC 5082]), equivalent to the IPv4 functionality merged in 2.6.34 [http://git.kernel.org/linus/e802af9cabb011f09b9c19a82faef3dd315f27eb (commit)]

• mac80211 (wireless stack)

  • Add offload channel switch support [http://git.kernel.org/linus/5ce6e438d5d9ed8ed775cd1e94f92002c8da2bad (commit)]

  • Add support for connection quality monitoring [http://git.kernel.org/linus/1e4dcd012423b6a28f968a55886d2b27896a1586 (commit)], [http://git.kernel.org/linus/a97c13c34509be460dea23c86f31c02daa2428b5 (commit)]

  • Enable QoS explicitly in AP mode [http://git.kernel.org/linus/0af26b278bc1d747370b451595b7586cb7b3455c (commit)]

  • Implement ap isolation support [http://git.kernel.org/linus/7b7b5e56d7bdfdd0eb5ea13e6c9613b16b8eac46 (commit)]

  • Use different MAC addresses for virtual interfaces automatically [http://git.kernel.org/linus/fa9029f8c34576e121a4b6ddbbd645081fe50c74 (commit)]

  • Allow controlling aggregation manually in debugfs [http://git.kernel.org/linus/a75b4363eaafa99d909da4f1192322a78b074c73 (commit)]

• cfg80211 (wifi configuration layer)

  • Add ap isolation support [http://git.kernel.org/linus/fd8aaaf3519f3fd3c82594e90bc6808072b94d54 (commit)]

  • Add connection quality monitoring support to nl80211 [http://git.kernel.org/linus/d6dc1a386358979e12366d1f35eeb68fc181e101 (commit)]

  • Add local-state-change-only auth/deauth/disassoc [http://git.kernel.org/linus/d5cdfacb35ed886271d1ccfffbded98d3447da17 (commit)]

• Bridge

  • per-cpu (scalable) packet statistics [http://git.kernel.org/linus/14bb4789833a2e2610f30e2d3e1451701ac96ec1 (commit)]

  • IPv6 MLD support. [http://git.kernel.org/linus/08b202b6726459626c73ecfa08fcdc8c3efc76c2 (commit)]

• Bluetooth

  • Add sockopt configuration for txWindow on L2CAP [http://git.kernel.org/linus/14b5aa71ec506f4e38ca6a1dc02ecd668ecfd902 (commit)]

  • Add SOCK_STREAM support to L2CAP [http://git.kernel.org/linus/bd3c9e255e76ae232d417e3914ca5d80ca3e9485 (commit)]

  • Implement 'Send IorRRorRNR' event [http://git.kernel.org/linus/d5392c8f1e9faef089bb7cb66c3314da8bddd1fe (commit)]

• 9P

  • Add support for 9p2000.L protocol [http://git.kernel.org/linus/9b6533c9b331ddbba9a40c972d82222ecffbc359 (commit)], [http://git.kernel.org/linus/c56e4acf55c804cbeea0ddb696ef698c73d39826 (commit)], [http://git.kernel.org/linus/4681dbdacb5cdc4d3273c3a97a1858d6e00a5fe7 (commit)], [http://git.kernel.org/linus/bda8e7752063cdbdd1d308bc1705400a8cec1aeb (commit)]

• flow: structurize flow cache [http://git.kernel.org/linus/d7997fe1f4584da12e9c29fb682c18e9bdc13b73 (commit)]

• netpoll: add generic support for bridge and bonding devices [http://git.kernel.org/linus/0e34e93177fb1f642cab080e0bde664c06c7183a (commit)], [http://git.kernel.org/linus/c06ee961d3c0e51009cbd0e123b61fbb97f37d0b (commit)], [http://git.kernel.org/linus/f6dc31a85cd46a959bdd987adad14c3b645e03c1 (commit)]

• Add netlink support for virtual port management (was iovnl) [http://git.kernel.org/linus/57b610805ce92dbd79fc97509f80fa5391b99623 (commit)]

• alloc_skb() speedup [http://git.kernel.org/linus/ec7d2f2cf3a1b76202986519ec4f8ec75b2de232 (commit)]

• Expose all network devices in a namespaces in sysfs [http://git.kernel.org/linus/a1b3f594dc5faab91d3a218c7019e9b5edd9fe1a (commit)]

• Netfilter xtables: merge xt_CONNMARK into xt_connmark [http://git.kernel.org/linus/b8f00ba27e4acc4a2224360ce3aa8a22354434c5 (commit)], merge xt_MARK into xt_mark [http://git.kernel.org/linus/28b949885f80efb87d7cebdcf879c99db12c37bd (commit)], inclusion of xt_TEE [http://git.kernel.org/linus/e281b19897dc21c1071802808d461627d747a877 (commit)]

• Add IFLA_STATS64 support [http://git.kernel.org/linus/10708f37ae729baba9b67bd134c3720709d4ae62 (commit)]

5. Tracing/Profiling

6. Crypto

• aesni-intel - Add AES-NI accelerated CTR mode [http://git.kernel.org/linus/12387a46bb150f5608de4aa9a90dfdddbf991e3f (commit)]

• mv_cesa - Add sha1 and hmac(sha1) async hash drivers [http://git.kernel.org/linus/750052dd2400cd09e0864d75b63c2c0bf605056f (commit)]

• n2 - Add Niagara2 crypto driver [http://git.kernel.org/linus/0a625fd2abaa0aa0a6852b153d429dbc784748cc (commit)]

• omap - sha1 & md5 driver [http://git.kernel.org/linus/8628e7c89075834fc7b44629d09ff4f9043af114 (commit)]

• talitos - add hash algorithms [http://git.kernel.org/linus/497f2e6b8b21407625a4fb34bc04b50eff098085 (commit)], add support for sha224 [http://git.kernel.org/linus/60f208d7836216885cdcd6f77a02f31dbc66f169 (commit)]

7. Virtualization

8. MD

• Add support for Raid0->Raid10 takeover [http://git.kernel.org/linus/dab8b29248b3f14f456651a2a6ee9b8fd16d1b3c (commit)]

• Add support for Raid0->Raid5 takeover [http://git.kernel.org/linus/54071b3808ee3dc8624d9d6f1b06c4fd5308fa3b (commit)]

• Add support for Raid5->Raid0 and Raid10->Raid0 takeover [http://git.kernel.org/linus/9af204cf720cedf369cf823bbd806c350201f7ea (commit)]

• Add support for raid5 -> raid4 takeover [http://git.kernel.org/linus/a78d38a1a16c8e009aa512caa71d483757fefc1c (commit)]

• Add support for raid0 -> raid4 takeover [http://git.kernel.org/linus/f1b29bcae116409db5e543622aadab43041c9ae9 (commit)]

9. Block

• laptop-mode: Make flushes per-device, to avoid waking up unnecesarily devices that have nothing to flush [http://git.kernel.org/linus/31373d09da5b7fe21fe6f781e92bd534a3495f00 (commit)]

• Block I/O controller (blkio)

  • Add the following statistics: io_service_time, io_wait_time, io_serviced, io_service_bytes [http://git.kernel.org/linus/303a3acb2362f16c7e7f4c53b40c2f4b396dc8d5 (commit)], io_merged stat [http://git.kernel.org/linus/812d402648f4fc1ab1091b2172a46fc1b367c724 (commit)] and, io_queued and avg_queue_size [http://git.kernel.org/linus/cdc1184cf4a7bd99f5473a91244197accc49146b (commit)]

  • Add more debug-only per-cgroup stats (group_wait_time, empty_time, idle_time) [http://git.kernel.org/linus/812df48d127365ffd0869aa139738f572a86759c (commit)]

  • Add a new interface "weight_device" for IO-Controller [http://git.kernel.org/linus/34d0f179d6dd711d3fc13c0820a456c59aae8048 (commit)], [http://git.kernel.org/linus/da69da184c06f365b335a0e013dc6360a82abe85 (commit)]

  • Add a reset_stats interface to reset statistics [http://git.kernel.org/linus/84c124da9ff50bd71fab9c939ee5b7cd8bef2bd9 (commit)]

• brd: support discard [http://git.kernel.org/linus/b7c335713ea130d707c22d7f7c57a8eca75ded7e (commit)]

10. Security

• TOMOYO: Add pathname grouping support. [http://git.kernel.org/linus/7762fbfffdbce8191f5236d5053b290035d3d749 (commit)]

11. Various

• crc32: major optimization [http://git.kernel.org/linus/836e2af92503f1642dbc3c3281ec68ec1dd39d2e (commit)]

• char drivers: RAM oops/panic logger [http://git.kernel.org/linus/56d611a04fb2db77334e06274de4daed92e2c626 (commit)]