#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 3.2 development cycle


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

[[TableOfContents()]]
= Prominent features in Linux 3.2 =
== ==
== ==

= Driver and architecture-specific changes =
All the driver and architecture-specific changes can be found in the [http://kernelnewbies.org/Linux_3.2_DriverArch Linux_3.2_DriverArch page]



= VFS =
 * The i_mutex lock use of generic _file_llseek hurts. Do (nearly) lockless generic_file_llseek [http://git.kernel.org/linus/ (commit)]

= Memory management =
 * thp: mremap support and TLB optimization [http://git.kernel.org/linus/ (commit)]
 * slub: per cpu cache for partial pages [http://git.kernel.org/linus/ (commit)], update slabinfo tools to report per cpu partial list [http://git.kernel.org/linus/ (commit)]

= Networking =
 * Add netlink based CAN routing [http://git.kernel.org/linus/ (commit)]
 * Add ethtool -g support to virtio_net [http://git.kernel.org/linus/ (commit)]
 * Batman adhoc networking:: implement AP-isolation on the receiver side [http://git.kernel.org/linus/ (commit)], implement AP-isolation on the sender side [http://git.kernel.org/linus/ (commit)]
 * af-iucv: The current transport mechanism for af_iucv is the z/VM offered communications facility IUCV. To provide equivalent support when running Linux in an LPAR, HiperSockets transport is added to the AF_IUCV address family [http://git.kernel.org/linus/ (commit)]
 * af-packet: af-packet: Added TPACKET_V3 headers. [http://git.kernel.org/linus/ (commit)], TPACKET_V3 flexible buffer implementation. [http://git.kernel.org/linus/ (commit)]
 * IEEE802.15.4: 6LoWPAN basic support [http://git.kernel.org/linus/ (commit)]
 * ipv4: gc_interval sysctl removed [http://git.kernel.org/linus/ (commit)]
 * mac80211: implement uAPSD [http://git.kernel.org/linus/ (commit)], mesh gate implementation [http://git.kernel.org/linus/ (commit)]
 * bridge: allow forwarding some link local frames, adding a new sysfs attribute /sys/class/net/brX/bridge/group_fwd_mask that controls forwarding of frames [http://git.kernel.org/linus/ (commit)]


= File systems =


 * Ext3: remove deprecated oldalloc [http://git.kernel.org/linus/ (commit)]

 * GFS2
  * Speed up delete/unlink performance for large files [http://git.kernel.org/linus/ (commit)]

 * CIFS
  * uid/gid to SID mapping [http://git.kernel.org/linus/ (commit)]
  * Add mount options for backup intent (try #6) [http://git.kernel.org/linus/ (commit)]
  * Allow for larger rsize= options and change defaults [http://git.kernel.org/linus/ (commit)]

 * JFFS2
  * Add compr=lzo and compr=zlib options [http://git.kernel.org/linus/ (commit)]
  * Implement mount option parsing and compression overriding [http://git.kernel.org/linus/ (commit)]

 * XFS
  * exofs: Support for RAID5 read-4-write interface. [http://git.kernel.org/linus/ (commit)]

 * SQUASHFS
  * Add an option to set dev block size to 4K [http://git.kernel.org/linus/ (commit)]


= Device Mapper =

 * dm table: add always writeable feature [http://git.kernel.org/linus/ (commit)], add immutable feature [http://git.kernel.org/linus/ (commit)], add singleton feature [http://git.kernel.org/linus/ (commit)]
 * dm log userspace: add log device dependency [http://git.kernel.org/linus/ (commit)]

= Block layer =
= Virtualization =
 * xen: Implement discard requests ('feature-discard') [http://git.kernel.org/linus/ (commit)], support 'feature-barrier' aka old-style BARRIER [http://git.kernel.org/linus/ (commit)]
 * lguest: Allow running under paravirt-enabled KVM. [http://git.kernel.org/linus/ (commit)]
 * hv: move hyperv code out of staging directory [http://git.kernel.org/linus/ (commit)]

= Crypto =
 * Add userspace configuration API [http://git.kernel.org/linus/ (commit)]
 * blowfish: add x86_64 assembly implementation [http://git.kernel.org/linus/ (commit)]
 * sha1: SSSE3 based SHA1 implementation for x86-64 [http://git.kernel.org/linus/ (commit)]
 * twofish: add 3-way parallel x86_64 assembler implemention [http://git.kernel.org/linus/ (commit)]

= Security =
 * Smack
  * Domain transition protections [http://git.kernel.org/linus/ (commit)]
  * Rule list lookup performance [http://git.kernel.org/linus/ (commit)]
  * Allow to access /smack/access as normal user [http://git.kernel.org/linus/ (commit)]
 * TOMOYO
  * Add environment variable name restriction support. [http://git.kernel.org/linus/ (commit)]
  * Add socket operation restriction support. [http://git.kernel.org/linus/ (commit)]
  * Allow controlling generation of access granted logs for per [http://git.kernel.org/linus/ (commit)]
  * Allow domain transition without execve(). [http://git.kernel.org/linus/ (commit)]

= Tracing/profiling =
 * perf annotate: Add --symfs option [http://git.kernel.org/linus/ (commit)]
 * perf script: Add drop monitor script [http://git.kernel.org/linus/ (commit)]
 * perf stat: Add -o and --append options [http://git.kernel.org/linus/ (commit)]
 * perf: Support setting the disassembler style [http://git.kernel.org/linus/ (commit)]
 * perf tools: Make --no-asm-raw the default [http://git.kernel.org/linus/ (commit)]
 * perf tools: Make perf.data more self-descriptive (v8) [http://git.kernel.org/linus/ (commit)]
 * x86: Implement IBS initialization [http://git.kernel.org/linus/ (commit)]
 * powerpc: Add POWER7 stalled-cycles-frontend/backend [http://git.kernel.org/linus/ (commit)]

= Various core changes =
 * init: add root=PARTUUID=UUID/PARTNROFF=%d support [http://git.kernel.org/linus/ (commit)]
 * iommu: Add fault reporting mechanism [http://git.kernel.org/linus/ (commit)]
 * loop: always allow userspace partitions and optionally support [http://git.kernel.org/linus/ (commit)]
 * aio: allocate kiocbs in batches, to improve performance [http://git.kernel.org/linus/ (commit)]
 * sysfs:
sysfs: Implement support for tagged files in sysfs. [http://git.kernel.org/linus/ (commit)]
Implement support for class attrs in tagged sysfs [http://git.kernel.org/linus/ (commit)]
 * process connector: add comm change event [http://git.kernel.org/linus/ (commit)]
 * debug-pagealloc: add support for highmem pages [http://git.kernel.org/linus/ (commit)]
 * sysctl: add support for poll() [http://git.kernel.org/linus/ (commit)]


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