#pragma section-numbers on
#pragma keywords Linux, Kernel, Operative System, Changes, changelog, File system, Linus Torvalds, Open Source, drivers
#pragma description Summary of the changes and new features merged in the Linux kernel during the 3.4 development cycle



/!\ /!\ /!\ Linux 3.4 has not been released /!\ /!\ /!\

'''''Summary''''': 

[[TableOfContents()]]
= Prominent features in Linux 3.4 =
== Feature ==


= 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]

= Various core changes =
 * Add kernel param to force disable module load [http://git.kernel.org/linus/  (commit)]
 * Add driver probe deferral mechanism [http://git.kernel.org/linus/  (commit)]
 * PM
  * Introduce "late suspend" and "early resume" of [http://git.kernel.org/linus/  (commit)]
  * Introduce generic callbacks for new device PM [http://git.kernel.org/linus/  (commit)]
  * Add min/max_freq limit requested by users. [http://git.kernel.org/linus/  (commit)]
 * prctl: add PR_{SET,GET}_CHILD_SUBREAPER to allow simple [http://git.kernel.org/linus/  (commit)]
 * procfs: mark thread stack correctly in proc/<pid>/maps [http://git.kernel.org/linus/  (commit)]
 * tty: rework pty count limiting [http://git.kernel.org/linus/  (commit)]
vfs: use 'unsigned long' accesses for dcache name comparison [http://git.kernel.org/linus/  (commit)]

= Memory Management =
 * Make swapin 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/  (commit)]
 * radix-tree: introduce bit-optimized iterator [http://git.kernel.org/linus/  (commit)]
 * SLAB Out-of-memory diagnostics [http://git.kernel.org/linus/  (commit)]
 * kgdb: add the ability to control the reboot [http://git.kernel.org/linus/  (commit)]

= File systems =
 * Ext4
  * Address scalability issue by removing extent cache statistics [http://git.kernel.org/linus/;a=commit;h=9cd70b347e9761ea2d2ac3d758c529a48a8193e6 (commit)]
  * Remove the journal=update mount option [http://git.kernel.org/linus/  (commit)]
  * Remove the resize mount option [http://git.kernel.org/linus/  (commit)]

 * Fuse
  * O_DIRECT support for files [http://git.kernel.org/linus/;a=commit;h=4273b793ec68753cc3fcf5be7cbfd88c2be2058d (commit)], 
  * allow nanosecond granularity [http://git.kernel.org/linus/;a=commit;h=0a2da9b2ef2ef76c09397597f260245b020e6522 (commit)]
 * NFS
  * Make clientaddr= optional [http://git.kernel.org/linus/  (commit)]
  * add mount options 'v4.0' and 'v4.1' [http://git.kernel.org/linus/  (commit)]
 * Initial qnx6fs addition [http://git.kernel.org/linus/  (commit)]
 * Hfsplus: add an ioctl to bless files [http://git.kernel.org/linus/  (commit)]

 * CIFS: Introduce credit-based flow control [http://git.kernel.org/linus/  (commit)]
 * GFS2
  * FITRIM ioctl support [http://git.kernel.org/linus/  (commit)]
  * glock statistics gathering [http://git.kernel.org/linus/  (commit)]


= Networking =
 * New "plug" queuing discipline: allows userspace to plug/unplug a network output queue, using the netlink interface [http://git.kernel.org/linus/  (commit)]
 * Add missing getsockopt for SO_NOFCS. [http://git.kernel.org/linus/  (commit)]
 * Implement IP_UNICAST_IF/IPV6_UNICAST_IF socket options [http://git.kernel.org/linus/  (commit)], implement IPV6_UNICAST_IF socket option. [http://git.kernel.org/linus/  (commit)]
 * unix sockets: Support peeking offset for datagram and seqpacket [http://git.kernel.org/linus/  (commit)], support peeking offset for stream sockets [http://git.kernel.org/linus/  (commit)]
 * tcp: md5: rcu conversion [http://git.kernel.org/linus/  (commit)]
 * tcp: allow splice() to build full TSO packets [http://git.kernel.org/linus/;a=commit;h=2f53384424251c06038ae612e56231b96ab610ee (commit)]
sock: Introduce the SO_PEEK_OFF sock option [http://git.kernel.org/linus/  (commit)]
 * af_unix: MSG_TRUNC support for dgram sockets [http://git.kernel.org/linus/  (commit)]


 * Netfilter
  * Add timeout extension [http://git.kernel.org/linus/  (commit)], add cttimeout infrastructure for fine timeout [http://git.kernel.org/linus/  (commit)], 
  * ctnetlink: add NAT support for expectations [http://git.kernel.org/linus/  (commit)]
  * ipset: Exceptions support added to hash:*net* [http://git.kernel.org/linus/  (commit)]
  * Merge ipt_LOG and ip6_LOG into xt_LOG [http://git.kernel.org/linus/  (commit)]

 * Bluetooth
  * Add support for HCI monitor channel [http://git.kernel.org/linus/  (commit)]
  * Implement Read Supported Commands commands for [http://git.kernel.org/linus/  (commit)]
  * Add support for Set SSP command [http://git.kernel.org/linus/  (commit)]
  * Implement Set LE command [http://git.kernel.org/linus/  (commit)]

= Virtualization =
 * New LSM: Yama [http://git.kernel.org/linus/  (commit)]
 * virtio-pci: S3 support [http://git.kernel.org/linus/;a=commit;h=04c2322bee841121cfdd7f284e1d4274e9e60e33 (commit)]
 * rpmsg: add virtio-based remote processor messaging bus [http://git.kernel.org/linus/  (commit)]

 * KVM
  * x86: increase recommended max vcpus to 160 [http://git.kernel.org/linus/  (commit)]
  * Allow host IRQ sharing for assigned PCI 2.3 devices [http://git.kernel.org/linus/  (commit)]
  * Infrastructure for software and hardware based TSC rate [http://git.kernel.org/linus/  (commit)]
  * PPC: Paravirtualize SPRG4-7, ESR, PIR, MASn [http://git.kernel.org/linus/  (commit)], e500: MMU API [http://git.kernel.org/linus/  (commit)]
  * s390: "Userspace controlled virtual machines" add parameter for KVM_CREATE_VM [http://git.kernel.org/linus/  (commit)]

 * hyperv
  * storvsc: Move the storage driver out of the staging area [http://git.kernel.org/linus/  (commit)]
  * Add support for vlan trunking from guests [http://git.kernel.org/linus/  (commit)]
  * Support the newly introduced KVP messages in the driver [http://git.kernel.org/linus/  (commit)]
  * Fully support the new KVP verbs in the user level [http://git.kernel.org/linus/  (commit)]
  * Support enumeration from all the pools [http://git.kernel.org/linus/  (commit)]
 * Xen
  * acpi-processor: C and P-state driver that uploads said [http://git.kernel.org/linus/  (commit)]
  * netfront: add netconsole support. [http://git.kernel.org/linus/  (commit)]



= Crypto =
 * caam: add sha224 and sha384 variants to existing [http://git.kernel.org/linus/  (commit)]
 * camellia: add assembler implementation for x86_64 [http://git.kernel.org/linus/  (commit)]
 * Driver for Tegra AES hardware [http://git.kernel.org/linus/  (commit)]
 * crc32: add slice-by-8 algorithm to existing code [http://git.kernel.org/linus/  (commit)]

= Security =
 * AppArmor
  * add "file" details to securityfs [http://git.kernel.org/linus/  (commit)]
  * add initial "features" directory to securityfs [http://git.kernel.org/linus/  (commit)]

= Block =

 * Make cfq_target_latency tunable through sysfs. [http://git.kernel.org/linus/;a=commit;h=5bf14c0727a07ded1bd9fa6d77923d7e6dc32833 (commit)]

 * Device Manager (DM):
  * raid10 - support resizing some RAID10 arrays. [http://git.kernel.org/linus/  (commit)]
  * thin: support discards [http://git.kernel.org/linus/  (commit)]
  * thin: support read only external snapshot origins [http://git.kernel.org/linus/  (commit)]


= Tracing/profiling =


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CategoryReleases