• Linux_3.2

Summary:

TableOfContents()

1. Prominent features in Linux 3.2

== == == ==

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]

3. VFS

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

4. Memory management

• Restrict access to slab files under procfs and sysfs [http://git.kernel.org/linus/ (commit)]

• vmscan: add block plug for page reclaim to reduce lock contention [http://git.kernel.org/linus/ (commit)]

• 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)]

5. 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)]

6. 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)]

• EXOFS

  • exofs: Support for RAID5 read-4-write interface. [http://git.kernel.org/linus/ (commit)], ore: RAID5 read [http://git.kernel.org/linus/ (commit)], ore: RAID5 Write [http://git.kernel.org/linus/ (commit)]

• SQUASHFS

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

7. 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)]

8. Block layer

9. 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)]

10. 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)]

11. 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)]

12. 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)]

13. 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)]

• Power management:
  • devfreq: devfreq is a generic DVFS framework that can be registered for a device with OPP support in order to let the governor provided to DEVFREQ choose an operating frequency based on the OPP's list and the policy given with DEVFREQ

PM: Introduce devfreq: generic DVFS framework with device-specific [http://git.kernel.org/linus/ (commit)]

• devfreq: Add common sysfs interfaces [http://git.kernel.org/linus/ (commit)] Add basic governors [http://git.kernel.org/linus/ (commit)]

  • Improve performance of LZO/plain hibernation, [http://git.kernel.org/linus/ (commit)]

  • Include storage keys in hibernation image on s390 [http://git.kernel.org/linus/ (commit)]

  • Implement per-device PM QoS constraints [http://git.kernel.org/linus/ (commit)]

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