Linux 3.11 ![/!\](/moin_static199/memodump/img/alert.png "/!\"){kind=small}
HAS NOT BEEN RELEASED
Summary:
1. Prominent features
2. Drivers and architectures
All the driver and architecture-specific changes can be found in the [http://kernelnewbies.org/Linux_3.11-DriversArch Linux_3.11-DriversArch page]
3. Core
Add alarm timers: Add support for clocks CLOCK_REALTIME_ALARM and CLOCK_BOOTTIME_ALARM, thereby enabling wakeup alarm timers via file descriptors [http://git.kernel.org/linus/11ffa9d6065f344a9bd769a2452f26f2f671e5f8 (commit)]
Add support for LZ4 compressed kernels [http://git.kernel.org/linus/cffb78b0e0b3a30b059b27a1d97500cf6464efa9 (commit)], [http://git.kernel.org/linus/c72ac7a1a926dbffb59daf0f275450e5eecce16f (commit)], [http://git.kernel.org/linus/e76e1fdfa8f8dc1ea6699923cf5d92b5bee9c936 (commit)]
Add option to log time spent in suspend [http://git.kernel.org/linus/5c83545f24ab3dd67e0ae0e2b795fea750f08c34 (commit)]
Task scheduler: Add load-tracking statistics to task to /proc/<PID>/sched [http://git.kernel.org/linus/939fd731eb88a0cdd9058d0b0143563172a217d7 (commit)]
Add support for wound/wait style locks, for more details see [https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/plain/Documentation/ww-mutex-design.txt Documentation/ww-mutex-design.txt] and [https://lwn.net/Articles/548909/ this recommended LWN article]. [http://git.kernel.org/linus/040a0a37100563754bb1fee6ff6427420bcfa609 (commit)]
RCU: Remove TINY_PREEMPT_RCU [http://git.kernel.org/linus/127781d1ba1ee5bbe1780afa35dd0e71583b143d (commit)]
timers: Allow the unbinding of clockevents/clocksources, provide sysfs interfaces for allow the unbinding [http://git.kernel.org/linus/03e13cf5ee60584fe0c831682c67212effb7fca4 (commit)], [http://git.kernel.org/linus/501f867064e95f9a6f540e60705be0937280e7ec (commit)], [http://git.kernel.org/linus/7eaeb34305dee26634f7c98ae62646da5cebe91d (commit)]
Implement generic percpu refcounting [http://git.kernel.org/linus/215e262f2aeba378aa192da07c30770f9925a4bf (commit)]
tools/cpupower: Implement disabling of cstate interface [http://git.kernel.org/linus/0924c369bc5492cf181a066fc2d459aa18ffa5ac (commit)], add Haswell family 0x45 specific idle monitor to show PC8,9,10 states [http://git.kernel.org/linus/7ee767b69b6885dd81bafaf1881c5028033a6177 (commit)]
4. Memory management
Speed up [http://linux.die.net/man/2/sync sync(2)] by 7-8x on busy filesystems [http://git.kernel.org/linus/7747bd4bceb3079572695d3942294a6c7b265557 (commit)]
Allow mmap's MAP_HUGETLB for hugetlbfs files [http://git.kernel.org/linus/493af578040e690f93f0fc8d9e7667ffff8155bb (commit)]
Support mmap() on /proc/vmcore [http://git.kernel.org/linus/83086978c63afd7c73e1c173c84aeab184c1e916 (commit)]
Tune vm_committed_as per-cpu counter [http://git.kernel.org/linus/917d9290af749fac9c4d90bacf18699c9d8ba28d (commit)]
Kswapd and page reclaim behaviour has been screwy in one way or the other for a long time. One example is reports of a large copy operations or backup causing the machine to grind to a halt or applications pushed to swap. Sometimes in low memory situations a large percentage of memory suddenly gets reclaimed. In other cases an application starts and kswapd hits 100% CPU usage for prolonged periods of time and so on. This patch series aims at addressing some of the worst of these problems. Code: [http://git.kernel.org/linus/75485363ce8552698bfb9970d901f755d5713cca (commit 1)], [http://git.kernel.org/linus/e82e0561dae9f3ae5a21fc2d3d3ccbe69d90be46 2], [http://git.kernel.org/linus/283aba9f9e0e4882bf09bd37a2983379a6fae805 3], [http://git.kernel.org/linus/b7ea3c417b6c2e74ca1cb051568f60377908928d 4], [http://git.kernel.org/linus/2ab44f434586b8ccb11f781b4c2730492e6628f5 5], [http://git.kernel.org/linus/9aa41348a8d11427feec350b21dcdd4330fd20c4 6], [http://git.kernel.org/linus/b8e83b942a16eb73e63406592d3178207a4f07a1 7], [http://git.kernel.org/linus/d43006d503ac921c7df4f94d13c17db6f13c9d26 8], [http://git.kernel.org/linus/8e950282804558e4605401b9c79c1d34f0d73507 9], [http://git.kernel.org/linus/7c954f6de6b630de30f265a079aad359f159ebe9 10], [http://git.kernel.org/linus/f7ab8db791a8692f5ed4201dbae25722c1732a8d 11], [http://git.kernel.org/linus/b1a6f21e3b2315d46ae8af88a8f4eb8ea2763107 12], [http://git.kernel.org/linus/e2be15f6c3eecedfbe1550cca8d72c5057abbbd2 13], [http://git.kernel.org/linus/b45972265f823ed01eae0867a176320071665787 14], [http://git.kernel.org/linus/d04e8acd03e5c3421ef18e3da7bc88d56179ca42 15)]
5. Block layer
bcache: Raid 5/6 optimizations [http://git.kernel.org/linus/72c270612bd33192fa836ad0f2939af1ca218292 (commit)]
Device-Mapper: add switch target. This target creates a device that supports an arbitrary mapping of fixed-size regions of I/O across a fixed set of paths [http://git.kernel.org/linus/9d0eb0ab432aaa9160cf2675aee73b3900b9bc18 (commit)]
Device Mapper: Add ability to restore transiently failed devices on resume [http://git.kernel.org/linus/9092c02d943515b3c9ffd5d0003527f8cc1dd77b (commit)]
blkio cgroup controller: implement proper hierarchy support [http://git.kernel.org/linus/9138125beabbb76b4a373d4a619870f6f5d86fc5 (commit)]
Add AIX partition table support [http://git.kernel.org/linus/6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6 (commit)]
md/raid5: allow 5-device RAID6 to be reshaped to 4-device. [http://git.kernel.org/linus/fdcfbbb653b27964c4daa4d2bcb364259c257e7d (commit)]
6. File systems
XFS
Disable speculative preallocation for small files, as it causes freespace fragmentation [http://git.kernel.org/linus/133eeb1747c33b6d75483c074b27d4e5e02286dc (commit)]
Currently userspace has no way of determining that a filesystem is CRC enabled. Add a flag to the XFS_IOC_FSGEOMETRY ioctl output to indicate that the filesystem has v5 superblock support enabled [http://git.kernel.org/linus/74137fff067961c9aca1e14d073805c3de8549bd (commit)]
Inode create transaction [http://git.kernel.org/linus/28c8e41af693e4b5cd2d68218f144cf40ce15781 (commit)], [http://git.kernel.org/linus/3ebe7d2d73179c4874aee4f32e043eb5acd9fa0f (commit)], [http://git.kernel.org/linus/b8402b4729495ac719a3f532c2e33ac653b222a8 (commit)]
Ordered log vector support: It allows to write metadata without physically logging every individual change but still maintain the full transactional integrity guarantees [http://git.kernel.org/linus/5f6bed76c0c85cb4d04885a5de00b629deee550b (commit)], [http://git.kernel.org/linus/fd63875cc4cd60b9e5c609c24d75eaaad3e6d1c4 (commit)]
Disable swap extents ioctl on CRC enabled filesystems [http://git.kernel.org/linus/02f75405a75eadfb072609f6bf839e027de6a29a (commit)]
Disable noattr2/attr2 mount options for CRC enabled filesystems, as they are always enabled in them [http://git.kernel.org/linus/d3eaace84e40bf946129e516dcbd617173c1cf14 (commit)]
EXT4
Transaction reservation support [http://git.kernel.org/linus/8f7d89f36829b9061a14f9040cda1372f264c4fe (commit)]
Avoid issuing empty commits unnecessarily [http://git.kernel.org/linus/9ff864462477206bc23b405a6ae506e92fb6dc9c (commit)]
Make punch hole work with bigalloc mode [http://git.kernel.org/linus/d23142c6271c499d913d0d5e668b5a4eb6dafcb0 (commit)]
The common writepages code path is now used for the nodelalloc and ext3 compatibility modes. This allows big writes to be submitted much more efficiently as a single bio request, instead of being sent as individual 4k writes [http://git.kernel.org/linus/20970ba65d5a22f2e4efbfa100377722fde56935 (commit)]
The extent cache shrink mechanism, which was introduce in 3.9, no longer has a scalability bottleneck caused by the i_es_lru spinlock [http://git.kernel.org/linus/d3922a777f9b4c4df898d326fa940f239af4f9b6 (commit)]
Btrfs
Remove btrfs_sector_sum structure, it improved the performance in a dd benchmark by ~74% on a SSD (31MB/s -> 54MB/s) [http://git.kernel.org/linus/f51a4a1826ff810eb9c00cadff8978b028c40756 (commit)]
Allow file data clone within a file [http://git.kernel.org/linus/a96fbc72884fcb0367c6c838357b841b8f10a531 (commit)]
Performance optimization: merge pending IO for tree log write back. By test, the performance of the sync write went up ~60%(2.9MB/s -> 4.6MB/s) on a scsi disk whose disk buffer was enabled [http://git.kernel.org/linus/c6adc9cc082e3cffda153999c9b9f8a8baaaaf45 (commit)]
Show compiled-in config features at module load time [http://git.kernel.org/linus/85965600f50b2e57746363d0ace4ab6b2bcb9c27 (commit)]
Add ioctl to wait for qgroup rescan completion [http://git.kernel.org/linus/57254b6ebce4ceca02d9c8b615f6059c56c19238 (commit)]
F2FS
Add remount support [http://git.kernel.org/linus/696c018c7718f5e33e1107da19c4d64a25018878 (commit)]
Support xattr security labels [http://git.kernel.org/linus/8ae8f1627f39bae505b90cade50cd8a911b8bda6 (commit)]
GFS2
Add atomic open support whose main benefit will be the reduction in locking overhead in case of combined lookup/create and open operations[http://git.kernel.org/linus/6d4ade986f9c8df31e68fd30643997f79cc5a5f8 (commit)]
CIFS
Add SMB3.02 dialect support [http://git.kernel.org/linus/20b6d8b42e7e7c9af5046fe525d6709e10d14992 (commit)]
SMB3 Signing enablement [http://git.kernel.org/linus/429b46f4fdaf9c9007b7c0fc371b94e40c3764b2 (commit)]
Handle big endianness in NTLM (ntlmv2) authentication [http://git.kernel.org/linus/fdf96a907c1fbb93c633e2b7ede3b8df26d6a4c0 (commit)]
SMB2 FSCTL and IOCTL requests[http://git.kernel.org/linus/4a72dafa19ba77a2fb77ae676f8e3a0d6077c37c (commit)]
Add a "nosharesock" mount option to force new sockets to server to be created [http://git.kernel.org/linus/a0b3df5cf1fc46ad885bbc5c9f56ff0f4877beb5 (commit)]
HPFS
Implement prefetch to improve performance [http://git.kernel.org/linus/275f495dbe34300d793466a7d96c70f83fbae1bc (commit)]
FAT
Add FAT_IOCTL_GET_VOLUME_ID [http://git.kernel.org/linus/6e5b93ee55d401f1619092fb675b57c28c9ed7ec (commit)]
NILFS2
Implement calculation of free inodes count [http://git.kernel.org/linus/c7ef972c440fc9f1eda28b450cd30ad15c4d60cf (commit)]
7. Networking
sit: add IPv4 over IPv4 support [http://git.kernel.org/linus/32b8a8e59c9c8fa56051d6e9ab2924e469ac4d92 (commit)]
9p: Make 9P2000.L the default protocol for 9p file system [http://git.kernel.org/linus/095e7999c09afa09345db864427cb4bb4c98ae1c (commit)]
9p: add privport option to 9p tcp transport [http://git.kernel.org/linus/2f28c8b31dc501027d9aa6acf496c5941736312b (commit)]
Add VF link state control [http://git.kernel.org/linus/1d8faf48c74b8329a0322dc4b2a2030ae5003c86 (commit)]
ipv6: add support of peer address [http://git.kernel.org/linus/caeaba79009c2ee858c3b2bf8caf922cd719fead (commit)]
mac80211: add support for per-chain signal strength reporting [http://git.kernel.org/linus/ef0621e805f9ef76eaf31ce6205028fe467e9ca9 (commit)]
mac80211: enable Auth Protocol Identifier on mesh config. [http://git.kernel.org/linus/0d4261ad5d0028b26cd88e645b4507eed8aab3f7 (commit)]
gso: Update tunnel segmentation to support Tx checksum offload [http://git.kernel.org/linus/cdbaa0bb26d8116d00be24e6b49043777b382f3a (commit)]
Implement /proc/net/icmp6. [http://git.kernel.org/linus/d862e546142328d18377a4704be97f2ae301847a (commit)]
bridge: Add a flag to control unicast packet flood. [http://git.kernel.org/linus/867a59436fc35593ae0e0efcd56cc6d2f8506586 (commit)]
netfilter: Implement RFC 1123 for FTP conntrack [http://git.kernel.org/linus/4e7dba99c9e606e304f104ce4071d8b5ba93957e (commit)]
nl80211: Add generic netlink module alias for cfg80211/nl80211 [http://git.kernel.org/linus/fb4e156886ce6e8309e912d8b370d192330d19d3 (commit)]
openvswitch: Add gre tunnel support. [http://git.kernel.org/linus/aa310701e787087dbfbccf1409982a96e16c57a6 (commit)]
openvswitch: Add tunneling interface. [http://git.kernel.org/linus/7d5437c709ded4f152cb8b305d17972d6707f20c (commit)]
packet: nlmon: virtual netlink monitoring device for packet sockets [http://git.kernel.org/linus/e4fc408e0e99fd2e009c8b3702d9637f5554fd5c (commit)]
xfrm: add LINUX_MIB_XFRMACQUIREERROR statistic counter [http://git.kernel.org/linus/4c4d41f200db375b2d2cc6d0a1de0606c8266398 (commit)]
- RDMA
cma: Define native IB address [http://git.kernel.org/linus/8d36eb01da5d371feffa280e501377b5c450f5a5 (commit)]
ucma: Allow user space to bind to AF_IB [http://git.kernel.org/linus/eebe4c3a62aadb64ba30bde97b96d656e369d934 (commit)]
ucma: Allow user space to pass AF_IB into resolve [http://git.kernel.org/linus/209cf2a751f9ff2a516102339e54fcac0176fa78 (commit)]
ucma: Allow user space to specify AF_IB when joining multicast [http://git.kernel.org/linus/5bc2b7b397b02026a0596a7807443a18422733fa (commit)]
ucma: Support querying for AF_IB addresses [http://git.kernel.org/linus/ee7aed4528fb3c44a36abd79eb23fd5401a5b697 (commit)]
- NFC
Add NCI over SPI receive [http://git.kernel.org/linus/391d8a2da787257aeaf952c974405b53926e3fb3 (commit)]
Add NCI over SPI send [http://git.kernel.org/linus/ee9596d467e4d05c77a8c883aeeb5b74d1a3cd31 (commit)]
Add a nfc hardware simulation driver [http://git.kernel.org/linus/7cbe0ff3e475b7268ad9b55057048b2299fd60e0 (commit)]
Add basic NCI over SPI [http://git.kernel.org/linus/8a00a61b0ef2bfd1b468dd20c0d0b1a94a8f7475 (commit)]
Add firmware upload netlink command [http://git.kernel.org/linus/9674da8759df0d6c0d24e1ede6e2a1acdef91e3c (commit)]
MPLS: Add limited GSO support [http://git.kernel.org/linus/0d89d2035fe063461a5ddb609b2c12e7fb006e44 (commit)]
8. Crypto
sha256_ssse3: add sha224 support [http://git.kernel.org/linus/a710f761fc9ae5728765a5917f8beabb49f98483 (commit)]
sha512_ssse3: add sha384 support [http://git.kernel.org/linus/340991e30ccef7b983cf2814ecea610504f5d059 (commit)]
Add lz4 Cryptographic API [http://git.kernel.org/linus/0ea8530dcf762526459b29ac713a623b51fd691f (commit)]
crct10dif: Accelerated CRC T10 DIF computation with PCLMULQDQ instruction [http://git.kernel.org/linus/31d939625a9a20b1badd2d4e6bf6fd39fa523405 (commit)], [http://git.kernel.org/linus/0b95a7f85718adcbba36407ef88bba0a7379ed03 (commit)]
dcp: support for Freescale's DCP co-processor [http://git.kernel.org/linus/519d8b1a9d81be7e4ffad8aa6b0e3ea03984bb86 (commit)]
9. Virtualization
hv
vmbus: Implement multi-channel support [http://git.kernel.org/linus/e68d2971d26577b932a16333ce165af98a96e068 (commit)]
10. Security
Smack
Local IPv6 port based controls [http://git.kernel.org/linus/c673944347edfd4362b10eea11ac384a582b1cf5 (commit)]
Add smkfstransmute mount option. It complements the smkfsroot option but also marks the root inode as transmutting [http://git.kernel.org/linus/e830b39412ca2bbedd7508243f21c04d57ad543c (commit)]
Apparmor
Remove "permipc" command [http://git.kernel.org/linus/4b7c331fc2eceaa4da5ded41c0b2eca3fd924444 (commit)]
11. Tracing/perf
Tracing
Add function probe to trigger a ftrace dump of current CPU trace [http://git.kernel.org/linus/90e3c03c3a09a7b176b3fe59d78f5d9755ac8e37 (commit)]
Add function probe to trigger a ftrace dump to console [http://git.kernel.org/linus/ad71d889b88055e61e3970a6744a271a51a94f42 (commit)]
perf
Add --percent-limit option in perf report and perf top for not showing small overhead entries in the output; also, a report.percent-limit config variable [http://git.kernel.org/linus/064f19815c4e99e8b22bc3c5f4d7f4e0b96d226a (commit)], [http://git.kernel.org/linus/fa5df94350510571cbe825f333996f57223b3cd2 (commit)], [http://git.kernel.org/linus/eec574e6bc3ee4558d4a282e0e3e1bd6dd0ad67b (commit)]
Add sysfs entry /sys/device/xxx/perf_event_mux_interval_ms to ajust the multiplexing interval per PMU. The unit is milliseconds [http://git.kernel.org/linus/62b8563979273424d6ebe9201e34d1acc133ad4f (commit)]
perf record: Remove -A/--append option, it's no longer working and needed [http://git.kernel.org/linus/563aecb2e63a16f86c7daabfdcfee23f3e7c5955 (commit)]
12. Other news sites that track the changes of this release
LWN: [https://lwn.net/Articles/557314/ The 3.11 merge window opens], [https://lwn.net/Articles/558126/ 3.11 merge window part 2], [https://lwn.net/Articles/558940/ The 3.11 merge window closes]