• Linux_3.4

Linux 3.4 has not been released

Summary:

TableOfContents()

1. Prominent features in Linux 3.4

1.1. Feature

2. Driver and architecture-specific changes

All the driver and architecture-specific changes can be found in the [http://kernelnewbies.org/Linux_3.4_DriverArch Linux_3.4_DriverArch page]

3. Memory management

• Make swap-in readahead skip over holes: when the swapped out data has holes, swap in things back in at rates of several MB/second, instead of a few hundred kB/second [http://git.kernel.org/linus/67f96aa252e606cdf6c3cf1032952ec207ec0cf0 (commit)]

• radix-tree microoptimization: introduce bit-optimized iterator [http://git.kernel.org/linus/78c1d78488a3c45685d993130c9f17102dc79a54 (commit)]

4. Various core changes

• A new kernel parameter, "nomodule", will disable module loading [http://git.kernel.org/linus/02608bef8f774c058779546926889a2f2717a499 (commit)]

• Allow userspace service managers/supervisors mark itself as a sort of 'sub-init', able to stay as the parent for all orphaned processes created by the started services. All SIGCHLD signals will be delivered to the service manager [http://git.kernel.org/linus/ebec18a6d3aa1e7d84aab16225e87fd25170ec2b (commit)]

• Mark thread stack correctly in proc/<pid>/maps [http://git.kernel.org/linus/b76437579d1344b612cf1851ae610c636cec7db0 (commit)]

• tty: rework the pty count limits [http://git.kernel.org/linus/e9aba5158a80098447ff207a452a3418ae7ee386 (commit)]

• kgdb: add the ability to control the reboot [http://git.kernel.org/linus/bec4d62ead8096e433d624d9339893f50badd992 (commit)]

• vfs microoptimacion: use 'unsigned long' accesses for dcache name comparison [http://git.kernel.org/linus/bfcfaa77bdf0f775263e906015982a608df01c76 (commit)]

5. File systems

• Ext4

  • Remove the outdated "journal=update" mount option [http://git.kernel.org/linus/43e625d84fa7daca0ad46f1dbc965b04fd204afe (commit)]

  • Remove the "resize" mount option, no longer useful in the age of online resize2fs [http://git.kernel.org/linus/661aa520577046192e50467b28c9c5726a8a9fb1 (commit)]

• Btrfs

  • Remove the ideal caching code [http://git.kernel.org/linus/285ff5af6ce358e73f53b55c9efadd4335f4c2ff (commit)]

  • Stop silently switching single chunks to raid0 on balance [http://git.kernel.org/linus/e3176ca2769e420f64eba4b093bbddea6d7a89c3 (commit)]

• XFS

  • Scalability improvements for quotas [http://git.kernel.org/linus/f8739c3ce2ac9a01515b56026b6a066c0808234b (commit)], [http://git.kernel.org/linus/9f920f116426806bfa34c1422742e1bf7b7a2b4b (commit)], [http://git.kernel.org/linus/a05931ceb0160deadbd7798d60d01b17f2d81b09 (commit)], [http://git.kernel.org/linus/b84a3a96751f93071c1863f2962273973c8b8f5e (commit)]

• FUSE

  • O_DIRECT support for files [http://git.kernel.org/linus/4273b793ec68753cc3fcf5be7cbfd88c2be2058d (commit)],

  • allow nanosecond granularity [http://git.kernel.org/linus/0a2da9b2ef2ef76c09397597f260245b020e6522 (commit)]

• NFS

  • Make 'clientaddr' mount option optional [http://git.kernel.org/linus/31b8e2aec099f22d40277c424d8c24b2a4c95fce (commit)]

  • Add mount options 'v4.0' and 'v4.1' [http://git.kernel.org/linus/7ced286e0ade171af89d32c22b1590e1ca480542 (commit)]

• GFS2

  • FITRIM ioctl support [http://git.kernel.org/linus/66fc061bda3526650328b73f69985da3518c4256 (commit)]

  • Glock statistics gathering [http://git.kernel.org/linus/a245769f254bbbea868e2cf8dc42daa061cd276f (commit)]

• HFSplus: add an ioctl to bless files [http://git.kernel.org/linus/a051f71ce97c53cde3ac64de64eb02d658d9308e (commit)]

• CIFS: Introduce credit-based flow control [http://git.kernel.org/linus/2d86dbc97094ea4cfc2204fdefd7d07685496189 (commit)]

6. Networking

• New "plug" queuing discipline: allows userspace to plug/unplug a network output queue, using the Netlink interface [http://git.kernel.org/linus/c3059be16c9ef29c05f0876a9df5fea21f29724f (commit)]

• BATMAN: add infrastructure to change routing algorithm [http://git.kernel.org/linus/1c280471b013e26c833fc86acc231c73442cfa21 (commit)]

• TCP

  • md5: RCU conversion [http://git.kernel.org/linus/a915da9b69273815527ccb3789421cb7027b545b (commit)].

  • Allow splice() to build full TSO packets [http://git.kernel.org/linus/2f53384424251c06038ae612e56231b96ab610ee (commit)]

• Netfilter

  • Add timeout extension [http://git.kernel.org/linus/dd705072412225a97784fe38feee2ebf8d14814d (commit)], [http://git.kernel.org/linus/50978462300f74dc48aea4a38471cb69bdf741a5 (commit)]

  • ctnetlink: add NAT support for expectations [http://git.kernel.org/linus/076a0ca02644657b13e4af363f487ced2942e9cb (commit)]

  • ipset: Exceptions support added to hash:*net* [http://git.kernel.org/linus/2a7cef2a4ba64b9bf0ff9aeaa364554716c06669 (commit)]

  • Merge ipt_LOG and ip6_LOG into xt_LOG [http://git.kernel.org/linus/6939c33a757bd006c5e0b8b5fd429fc587a4d0f4 (commit)]

• Bluetooth

  • Add support for HCI monitor channel [http://git.kernel.org/linus/cd82e61c110a36e398323e422896fcfe05879fed (commit)]

  • Implement Read Supported Commands commands for mgmt [http://git.kernel.org/linus/e70bb2e89959983aebcfce28f645a1104ffa9ab2 (commit)]

  • Add support for Set SSP command [http://git.kernel.org/linus/ed2c4ee360709ca838efa0ea4d6295590aff3d24 (commit)]

  • Implement Set LE command [http://git.kernel.org/linus/06199cf86a84206cfdc96b8dc02d5c27efa8c60f (commit)]

• Socket options

  • Implement IP_UNICAST_IF/IPV6_UNICAST_IF socket options [http://git.kernel.org/linus/76e21053b5bf33a07c76f99d27a74238310e3c71 (commit)], [http://git.kernel.org/linus/c4062dfc425e94290ac427a98d6b4721dd2bc91f (commit)]

  • Add missing getsockopt for SO_NOFCS. [http://git.kernel.org/linus/bc2f7996858db66f2d5b154aac10971655f72cad (commit)]

  • Introduce the SO_PEEK_OFF sock option [http://git.kernel.org/linus/ef64a54f6e558155b4f149bb10666b9e914b6c54 (commit)]

  • Support peeking offset for datagram, seqpacket [http://git.kernel.org/linus/f55bb7f9cb82dec2f2e803d7bd0fc5929248e4d8 (commit)] and stream [http://git.kernel.org/linus/fc0d753641f7b919c7273d9bd21ae6ab45e757f3 (commit)]

  • MSG_TRUNC support for dgram sockets [http://git.kernel.org/linus/9f6f9af7694ede6314bed281eec74d588ba9474f (commit)]

7. Virtualization

• KVM

  • x86: increase recommended max vcpus to 160 [http://git.kernel.org/linus/a59cb29e4d81e025192550c2703f305637f016f6 (commit)]

  • Allow host IRQ sharing for assigned PCI 2.3 devices [http://git.kernel.org/linus/07700a94b00a4fcbbfb07d1b72dc112a0e036735 (commit)]

  • Infrastructure for software and hardware based TSC rate [http://git.kernel.org/linus/cc578287e3224d0da196cc1d226bdae6b068faa7 (commit)]

  • PPC: Paravirtualize SPRG4-7, ESR, PIR, MASn [http://git.kernel.org/linus/b59049720dd95021dfe0d9f4e1fa9458a67cfe29 (commit)], e500: MMU API [http://git.kernel.org/linus/dc83b8bc0256ee682506ed83853a98eaba529c6f (commit)]

  • s390: "Userspace controlled virtual machines" add parameter for KVM_CREATE_VM [http://git.kernel.org/linus/e08b96371625aaa84cb03f51acc4c8e0be27403a (commit)]

• hyperv

  • storvsc: Move the storage driver out of the staging area [http://git.kernel.org/linus/89ae7d709357df3a60e81c57613859d91d093ace (commit)]

  • Add support for VLAN trunking from guests [http://git.kernel.org/linus/1f5f3a75e216fe771b8d6805e0bb2f43595a6ee1 (commit)]

  • Support the newly introduced KVP messages in the driver [http://git.kernel.org/linus/fa3d5b85c681518b6e4ec515814dcb2d5b702b89 (commit)]

  • Fully support the new KVP verbs in the user level [http://git.kernel.org/linus/db425334e5bb7fa65bbbd7bea9d79842f65bcf45 (commit)]

  • hvc_xen: implement multiconsole support [http://git.kernel.org/linus/02e19f9c7cacfb33d7b2f5cace7972fa60f92319 (commit)], [http://git.kernel.org/linus/cf8e019b523a8caa95b56ff0ce62a4856b14395f (commit)]

  • Support enumeration from all the pools [http://git.kernel.org/linus/adc80ae60eae24a43a357bf5b30fb496f34aa605 (commit)]

• Xen

  • Xen ACPI processor: C and P-state driver that uploads said data to hypervisor [http://git.kernel.org/linus/59a56802918100c1e39e68c30a2e5ae9f7d837f0 (commit)]

  • netfront: add netconsole support [http://git.kernel.org/linus/cf66f9d48a9c95baf8f13b199a633ce1c4cf952a (commit)]

• virtio-pci: S3 support [http://git.kernel.org/linus/04c2322bee841121cfdd7f284e1d4274e9e60e33 (commit)]

• rpmsg: add virtio-based remote processor messaging bus [http://git.kernel.org/linus/ac8954a413930dae3c53f7e782f09a94e7eae88b (commit)]

8. Crypto

• caam: add sha224 and sha384 variants to existing [http://git.kernel.org/linus/e863f9ccc7658883be7b42eb63851aef9da7630c (commit)]

• camellia: add assembler implementation for x86_64 [http://git.kernel.org/linus/0b95ec56ae19f61ca664e83766a2180057f0e351 (commit)]

• Driver for Tegra AES hardware [http://git.kernel.org/linus/f1df57d02a0f83e764b4dc9187f58665d70f190e (commit)]

• crc32: add slice-by-8 algorithm to existing code [http://git.kernel.org/linus/324eb0f17d9dcead3c60c133aa244f6b3631fec9 (commit)]

9. Security

• Apparmor

  • Add "file" details to securityfs [http://git.kernel.org/linus/a9bf8e9fd561ba9ff1f0f2a1d96e439fcedaaaa4 (commit)]

  • Add initial "features" directory to securityfs [http://git.kernel.org/linus/e74abcf3359d0130e99a6511ac484a3ea9e6e988 (commit)]

10. Block

• Make cfq_target_latency tunable through sysfs. [http://git.kernel.org/linus/5bf14c0727a07ded1bd9fa6d77923d7e6dc32833 (commit)]

• Device Manager (DM):

  • raid10: support resizing some RAID10 arrays. [http://git.kernel.org/linus/006a09a0ae0a494473a8cd82c8d1d653e37e6663 (commit)]

  • thin target: support discards [http://git.kernel.org/linus/104655fd4dcebd50068ef30253a001da72e3a081 (commit)]

11. Perf profiling

• ftrace: Add enable/disable ftrace_ops control interface [http://git.kernel.org/linus/e248491ac283b516958ca9ab62c8e74b6718bca8 (commit)]

• perf bench: Allow passing an iteration count to "bench mem [http://git.kernel.org/linus/e3e877e79b7c6a322f9f628e87052c13581238cc (commit)]

• perf report

  • Add --symbol-filter option [http://git.kernel.org/linus/b14ffaca44c60da1c900aa36131ef3d9858001fc (commit)]

  • Add a simple GTK2-based 'perf report' browser [http://git.kernel.org/linus/c31a94570552dcaa517c4f7a043ffd28835016be (commit)]

  • Enable TUI in branch view mode [http://git.kernel.org/linus/a68c2c58171391ef368fced32a555b2f0ff106e5 (commit)]

• script: Add option resolving vmlinux path [http://git.kernel.org/linus/0bc8d20580af74c9a8a39c200e269261e5cded05 (commit)]

• tools: Add code to support PERF_SAMPLE_BRANCH_STACK [http://git.kernel.org/linus/b5387528f31d98acedf06e930554b563d87e2383 (commit)]

• perf tools: Add config options support for event parsing [http://git.kernel.org/linus/8f707d843c2f4023490a873dbc182f632a3a5906 (commit)]

• perf tools: Add parser generator for events parsing [http://git.kernel.org/linus/89812fc81f8d62d70433a8ff63d26819f372e8ec (commit)]

• perf tools: Add perf pmu object to access pmu format definition [http://git.kernel.org/linus/cd82a32e9924d3a82bd27f830755d23e4ded25bc (commit)]

• perf tools: Add support to specify pmu style event [http://git.kernel.org/linus/5f537a26590e696466aae7f41e6b77e92c8486d1 (commit)]

• perf ui browser: Add 's' key to filter by symbol name [http://git.kernel.org/linus/938a23ae7f656ffde9dd67e83dddf4406f85d773 (commit)]

• perf: Adding sysfs group format attribute for pmu device [http://git.kernel.org/linus/641cc938815dfd09f8fa1ec72deb814f0938ac33 (commit)]

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