#pragma section-numbers on
#pragma keywords Linux, kernel, operating system, changes, changelog, file system, Linus Torvalds, open source, device drivers
#pragma description List of changes and new features merged in the Linux kernel during the 5.1 development cycle

Linux 5.1 has not been released. Meanwhile, you can read about the features it will include here: 

Summary: TBD

<<TableOfContents(3)>>
= Coolest features =

= Core (various) =

= File systems =

= Memory management =
 * Allow excluding balloon pages from kdump crash dumps to reduce their size. Also exclude them from hibernation image. [[https://git.kernel.org/linus/4d3467e171f8a8ef8f1dd205769cf2f21fbc8e1e|commit]] [[https://git.kernel.org/linus/ca215086b14b89a0e70fc211314944aa6ce50020|commit]] [[https://git.kernel.org/linus/e04b742f74c236202b7a505c2688068969d00e65|commit]] [[https://git.kernel.org/linus/77c4adf6a6df6f8f39807eaed48eb73d0eb4261e|commit]] [[https://git.kernel.org/linus/fae42c4d522b9b9c9de21a5cade162f2e7eaf644|commit]] [[https://git.kernel.org/linus/8165540c7fbc4a638d53907d2d51de6751f4a8ab|commit]] [[https://git.kernel.org/linus/5b56db37218e6503906c6057c177a84f0a0ba551|commit]] [[https://git.kernel.org/linus/abd02ac616e32d818a0478e68924beac8ba5e5d8|commit]]
 * Various vmalloc() fixes and a new vmalloc test module and script. [[https://git.kernel.org/linus/5a82ac715d1fd4f117d7b7e76664c0ea3d09e5e7|commit]] [[https://git.kernel.org/linus/401592d2e095947344e10ec0623adbcd58934dd4|commit]] [[https://git.kernel.org/linus/c67dc6247576250a9c9f09adcabad0385a1e7d73|commit]] [[https://git.kernel.org/linus/bc84c53525b4199317df1dab414263a68ba4b6f6|commit]] [[https://git.kernel.org/linus/153178edc7819b5c550e5d498d50697ff9d5f223|commit]] [[https://git.kernel.org/linus/3f21a6b7ef207892841feecc3b9216e1a29c745f|commit]] [[https://git.kernel.org/linus/a05ef00c97900f69f6e69d88e8a657b7a4ef8cbd|commit]] [[https://git.kernel.org/linus/afd07389d3f4933c7f7817a92fb5e053d59a3182|commit]]
 * On arm64, enables HugeTLB migration support for all supported huge page sizes at all levels including contiguous bit implementation. [[https://git.kernel.org/linus/7ed2c31dabdeb3ee6abe8ff5aac7287821a50cba|commit]] [[https://git.kernel.org/linus/9b553bf5eb99dd1b2d8ae23136da46da5c205dfd|commit]] [[https://git.kernel.org/linus/e693de186414ae66f2a316ff9befcd2b7a6d07b6|commit]] [[https://git.kernel.org/linus/4a03a058d1fe7558faffab1a831dde508501e85c|commit]] [[https://git.kernel.org/linus/5480280d3f2d11d47f9be59d49b20a8d7d1b33e8|commit]]
 * Increase success rates and reduce latency of compaction (physical memory defragmentation), reducing the number of scanned pages for migration by 65%, and free pages for migration targets by 97%, while improving transparent hugepage allocation success rates significantly. [[https://git.kernel.org/linus/c5fbd937b603885f1db3280ca212ed28add895bc|commit]] [[https://git.kernel.org/linus/c5943b9c5312d4fa23175ff146e901b865e4a60a|commit]] [[https://git.kernel.org/linus/566e54e113eb2b669f9300db2c2df400cbb06646|commit]] [[https://git.kernel.org/linus/40cacbcb324036233a927418441323459d28d19b|commit]] [[https://git.kernel.org/linus/4469ab98477b290f6728b79f8d225d9d88ce16e3|commit]] [[https://git.kernel.org/linus/806031bb5ec36ed879d64249d5a5cf9c6657f89d|commit]] [[https://git.kernel.org/linus/efe771c7603bc524425070d651e70e9c56c57f28|commit]] [[https://git.kernel.org/linus/fd1444b2729289ea3ef6b6096be604f8983e9f9f|commit]] [[https://git.kernel.org/linus/70b44595eafe9c7c235f076d653a268ca1ab9fdb|commit]] [[https://git.kernel.org/linus/e380bebe4771548df9bece8b7ad9dab07d9158a6|commit]] [[https://git.kernel.org/linus/5a811889de10f1ebb8e03a2744be006e909c405c|commit]] [[https://git.kernel.org/linus/804d3121ba5f03af0ab225e2f688ee3ee669c0d2|commit]] [[https://git.kernel.org/linus/cb2dcaf023c2cf12d45289c82d4030d33f7df73e|commit]] [[https://git.kernel.org/linus/9bebefd59084af7c75b66eeee241bf0777f39b88|commit]] [[https://git.kernel.org/linus/8854c55f54bcc104e3adae42abe16948286ec75c|commit]] [[https://git.kernel.org/linus/cb810ad294d3c3a454e51b12fbb483bbb7096b98|commit]] [[https://git.kernel.org/linus/cf66f0700c8f1d7c7c1c1d7e5e846a1836814601|commit]] [[https://git.kernel.org/linus/d097a6f63522547dfc7c75c7084a05b6a7f9e838|commit]] [[https://git.kernel.org/linus/dbe2d4e4f12e07c6a2215e3603a5f77056323081|commit]] [[https://git.kernel.org/linus/4fca9730c51d51f643f2a3f8f10ebd718349c80f|commit]] [[https://git.kernel.org/linus/e332f741a8dd1ec9a6dc8aa997296ecbfe64323e|commit]] [[https://git.kernel.org/linus/5e1f0f098b4649fad53011246bcaeff011ffdf5d|commit]]
 * Prevent SLAB and other pages with special type to be mapped into userspace, for improved security. [[https://git.kernel.org/linus/2d432cb7091e99881af803cdd67a31969b863005|commit]] [[https://git.kernel.org/linus/0ee930e6cafa048c1925893d0ca89918b2814f2c|commit]]
 * Remove the OOM killer heuristic that preferred to kill children of the "worst" process rather than the process itself. [[https://git.kernel.org/linus/bbbe48029720d2c6b6733f78d02571a281511adb|commit]]