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NEWS
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libhugetlbfs 2.24
======================================================================
New Features
* Basic loong64 support
Bug Fixes
* Disable hugepage-backed malloc if glibc __morecore is not available
* Fix handle leak in gethugepagesizes()
* Fix possible wild pointer returned in get_hugepage_region
* Fix max hugetlb segment to adapt x86
Test Suite
* Update /sys/kernel/mm/hugepages/ directory parse
* Disable partial usecases of shmoverride_linked_static
Build
* switch to automake
libhugetlbfs 2.23 "The Cedarvale Ravine"
======================================================================
New Features
* Basic riscv64 support
Bug Fixes
* Python now waits on child processes with os.wait()
* open() call with O_CREAT now passes permissions
* -Ttext-segment argument on aarch64 passes page size in hex
* Build system improvements
libhugetlbfs 2.22 "The Corner of College and St George"
======================================================================
New Features
* Library now verifies if slices are supported on PPC
Bug Fixes
* ld.hugetlbfs now supports multiple page sizes on PPC64
* Various GCC warning cleanups
* setup script converted to Python 3
Test Suite
* Tests are only run on online CPUs and only if a sufficient number are
available
* task-size-overrun now searches empty address space more efficiently
* Tests that do not link the library are run for default page sizes only
* Test runner now uses Python 3
libhugetlbfs 2.21 "The Bloor Annex"
======================================================================
New Features
* Suport for 512M huge pages on aarch64
Bug Fixes
* The noexec stack markers are set directly
* We no longer lie to glibc about shrinking the heap by less than HPAGE_SIZE
Test Suite
* No existent tests are no longer marked Killed By Signal
* Disable malloc per-thread cache for heap shrinking tests
libhugetlbfs 2.20 "View Across the Charles"
======================================================================
Bug Fixes
* Fix keyword collisions and warnings from GCC 5
* hugeadm output is parsed for default size in huge_page_setup_helper
Test Suite
* fallocate tests
libhugetlbfs 2.19 "Missing Longfellow Lanes"
======================================================================
Bug Fixes
* Fixed hugeadm behavior when mtab is a symlink
* fix plt_extrasz() on ppc64le
* ARM: fix page size and text offset setup
* Fix hugeadm handling of negative pool resize amounts
Test Suite
* remove duplicate mremap-* tests
libhugetlbfs 2.18 "Infinite Corridor"
======================================================================
New Features
* Add support for ppc64le
* ARM 64 big endian support
Bug Fixes
* Reverted 3bdd9924 which broke building on PPC64
* Fix parsing of kernel version string
* ARM: mark direct_syscall as a FUNC
Test Suite
* mmap of huge page files with misaligned offset success treated as PASS
libhugetlbfs 2.17 "Fowl and Fetus"
======================================================================
New Features
* PPC segement alignment restrictions can be disabled
* Added Aarch64 support
Bug Fixes
* Allow compiler overrides for 64 and 32 bit builds
* hugeadm now handles /etc/mtab being a simlink properly
Test Suite
* Add corrupt-by-cow-opt test
* Add noresv-preserve-resv-page test
* Add noresv-regarded-as-resv test
libhugetlbfs 2.16 "Joe E. Parker"
======================================================================
New Features
* ARM Support
* s390x Dynamic TASK_SIZE support
Bug Fixes
* find_mounts() now properly NULL terminates mount point names
Test Suite
* ARM Support
* mremap-fixed-huge-near-normal no longer calls munmap with 0 length
libhugetlbfs 2.15 "Minature Panda"
======================================================================
New Features
* Add variable in Makefile to disable using deprecated linker scripts
* s390 support
Bug Fixes
* Disable Unable to verify address range warning when offset < page_size
* Remove sscanf in library setup to avoid heap allocation before _morecore
override
* Revert heap exhaustion patch
* hugectl no longer clips LD_LIBRARY_PATH variable
Test Suite
* Fix mremap-expand-slice-collision expanding anon shm
* mremap-expand-slice-collision now asks kernel for availble slices
* Make 4GB boundary tests only fail when allocation fails on free slice
* Link 4GB test cases with --static so libraries are not placed in the way
libhugetlbfs 2.14 "The White Album"
======================================================================
New Features
* Updated man pages
* Added basic events for core_i7 to oprofile_map_events
Bug Fixes
* Fix clean on failure code to avoid closing stdout
Test Suite
* Fixed readahead, malloc, and hugepagesizes tests
* Avoid core dumps on stack_grow_into_huge test
libhugetlbfs 2.13 "Insert Clever Title Here"
======================================================================
New Features
* hugeadm can now be used to control Transparent Huge Page tunables
* New morecore mode to better support THP
Bug Fixes
* Check permissions on hugetlbfs mount point before marking it as available
Test Suite
* Fix shm tests to use random address instead of fixed, old address failed
on ARM
libhugetlbfs 2.12 "Serrano"
======================================================================
New Features
* libhugetlbfs usage can now be restricted to certain binary names
* lihugetlbfs now supports static linking
* hugeadm uses more human readable directory names for mount points
Bug Fixes
* hugeadm would segfault if specified user was not in passwd, failure in
getpwuid() is now checked
Test Suite
* Added missing tests to driver script
* Added tests for static linking
libhugetlbfs 2.11 "Ghost Pepper"
======================================================================
New Features
* cpupcstat reports time servicing tlb misses when requested
* When supported by the kernel and glibc, MAP_HUGETLB is used
for the heap and to back memory returned by get_huge_pages.
These features can now be used without mounting hugetlbfs
Bug Fixes
* tlbmiss_cost.sh supresses oprofile errors
* numerous fixes to setup_helper.py
* Corrected usage of hugetlbfs_test_feature return value
* find_mounts now correctly ignores non-hugetlbfs mount points
* When prefaulting pages for get_huge_pages readv was using the fd
for the mapping, this caused the prefault to fail on older libc.
Now /dev/zero is used for all prefaulting
libhugetlbfs 2.10 "Another Hottie"
======================================================================
Bug Fixes
* hugeadm now handles pool size deltas properly
* Makefile uses ?= to assign PREFIX and EXEDIR to allow for easier build
modification
libhugetlbfs 2.9 "Something Spicy"
======================================================================
New Features
* Add --no-reseve to hugectl to request mmap'd pages are not reserved
for kernels newer than 2.6.34
* POWER6 now supported by TLB miss cost estimator
* Add --obey-numa-mempol to hugeadm to request static pool pages are
allocated following the process NUMA memory policy
Test Suite
* Fix gethugepagesizes test case
libhugetlbfs 2.8 "Scotch Bonnet"
======================================================================
New Features
* Add switch to let administrator limit new mount points by size or inodes
* cpupcstat now caches the value returned by tlmiss_cost.sh to avoid
rerunning the script
Bug Fixes
* errno values are saved in get_huge_pages
* tlbmiss_cost.sh patches calibrator to fix round naming collision
* Fixed ALIGN_UP macro for aligning huge page segments
* Fix --create-mounts switch in hugeadm
* Library and helpers are all linked with -z noexecstack
Test Suite
* run_tests.py detects valid word sizes
libhugetlbfs 2.7 "Adobo"
======================================================================
New Features
* When specifying huge page pool sizes with hugeadm, memory sizes can
be used as well as the number of huge pages
* DEFAULT is now a valid huge page pool for resizing, it will adjust
the pool for the default huge page size
* tlbmiss_cost.sh in the contrib/ sub directory will estimate the cost
in CPU cycles of a TLB miss on the arch where it is run
* Add python script which automates huge page pool setup with minimal
input required from user
Bug Fixes
* The --dry-run switch in hugeadm is now obeyed
* hugeadm now uses unsigned long long for page resizes to avoid
overflow errors
* --set-recommended-shmmax no longer overflows if the number of
available huge pages is bigger than the address space
Test Suite
* Updated linkhuge_nofd to override proper functions when testing
* run_tests.py can now monitor the pool sizes between tests to help
identify accounting errors
* Add test for mremap bug on architectures with holes in address space
libhugetlbfs 2.6 "Adovada"
======================================================================
New Features
* cpupcstat now supports data collection using the perf tool as well as
oprofile
* --explain reports if min_free_kbytes is too small
* add --set-min_free_kbytes to hugeadm
Bug Fixes
* Admin utils (hugeadm, hugectl, etc) are now built as 64 bit binaries
if possible to support adminstration of larger huge page sizes
Test Suite
* Suppress ld.hugetlbfs warnings during test suite build
* Make SPECIAL keyword test cross-compile safe
* Test script sets proper rlimits for mlock and stack_grow_into_huge
tests
* Ensure that all elflink tests are run with both HUGETLB_SHARE=0 and
HUGETLB_SHARE=1
libhugetlbfs 2.5 "Self Titled"
======================================================================
New Features
* added --add-ramdisk-swap option to hugeadm to use ramdisks as
temporary swap space for diskless systems
* added --persist option to hugeadm to be used with either --add-*-swap
option. Makes swap added stay until removed or the machine is rebooted
* added cpupcstat script which uses oprofile to monitor tlb miss rate
of a target program
Bug Fixes
* --add-temp-swap option now takes an optional integer argument that is
the size in number of hugepages to make the swap space
libhugetlbfs 2.4 "Birdseye"
======================================================================
New Features
* added --add-temp-swap option to hugeadm to add a swap file for a pool
resize
* added --[enable|disable]-zone-moveable options to hugeadm to control
/proc/sys/vm/hugepages_treat_as_movable
Bug Fixes
* Fix pool-pages-max processing by using the proper array for its
requests
* Move private reservation check out of morecore setup
Test Suite
* Added regression tests for leaking reserve count due to madvise and
fadvise and readahead
* Add test for mixed permissions on shm segments
* Wrap tests that can hang the machine to fail is kernel is too old
* Add -f option to run_tests.py to force running of tests that can hang
the machine
libhugetlbfs 2.3 "NuMex Sunglo"
======================================================================
New Features
* added --force-preload option to hugectl for backing segments with
64kb pages on ppc64 when app was not linked with libhugetlbfs
* added --explain swtich to hugadm to give a quick overview of the
system wrt huge pages
* hugeadm warns if min pool size is being adjusted without sufficient
swap space configured
* added --hard switch to ask hugeadm to try multiple times to resize
a huge page pool
* added --create-*-mounts switches to create mount points for hugetlbfs
usable by specific users, groups, or globally
Bug Fixes
* hugeadm will no longer mount a directory multiple times
* hugeadm adds all new mount points to /etc/mtab
libhugetlbfs 2.2 "Barkers Extra Hot"
======================================================================
New Features
* Refactored environment variable parsing to read once and store values
* Add --list-mounts and --list-all-mounts options to hugeadm
* Rework test suite to run for all avaialbe page sizes
* Add --create-mounts for root only, --create-user-mounts,
--create-group-mounts, and --create-global-mounts options to hugeadm
* Add --share-text option to hugectl
Test Suite Fixes
* Added wrapper to shm-fork and shm-getraw tests that makes runs on
hpage sizes different from default expected failures
* Reworked shmoverride tests to handle new env parsing
libhugetlbfs 2.1 "NM 64"
======================================================================
New Features
* Multiple page size support
* Add a more user friendly allocator that handles cache coloring
* Add pagesize utility to display supported page sizes
* Add hugeadm utility for managing hugepage pools
* Add hugectl utility for running programs using hugepages
* Add hugeedit utility for marking segments in aligned binaries for
huge page backing by default
* Deprecated linker linker scripts
* gethugepagesize() and getpagesizes() API added to programatically
discover supported hugepages
* Manual pages for all API functions and utilities
* Allow automatic backing of shared memory segments with hugepages
* huge page regions will no longer prefault for kernels >= 2.6.27
improving mmap() performance and NUMA layout
Bug Fixes
* Add missing segment to interp section in linker scripts
* Fix free_hugepage_region to handle segments that fell back to small
pages
* Fix install when lib32 and lib64 resolve to the same place
* Install header files so APIs can be used
* Fix installation paths to make life easier for package maintainers
* Do not export internal symbols unnecessarily
* Prefault regions allocated by direct allocation API on kernels older
than 2.6.27
* Gracefully fallback to using base pages for text/data when the
hugepage pool is too small
* Fix handling of HUGETLB_SHARE_PATH environment variable
* Relax remapping requirements
Test suite Fixes
* Added expected failure support
* gethugepagesizes override for getting meminfo
* Increase debug output for tests that fail
* Summarise pass and failure counts
libhugetlbfs 2.0 "Sandia Red"
======================================================================
New Features
* New scriptless relinking for binutils >= 2.17
* Added direct allocator API for huge pages
Bug Fixes
* /proc/mounts is parsed line at a time to handle file larger than 4kb
* Read-only mappings use MAP_NORESERVE
Test suite fixes
* Add test for /proc/mounts file larger than 4kb
* Fix quota test with private reservations
* Output strerror on failure
* linkhuge tests are skipped when known to be broken
libhugetlbfs 1.3 "Big Jim"
======================================================================
New features
* Add HUGETLB_NO_PREFAULT to control prefaulting of huge pages via mlock
* Add "[hostname:pid]" to output messages
* Setup for handling larger huge page sizes e.g. 16G huge pages
* Update for new upstream sysctl
* Add support for hugetlbfs_morecore to shrink the heap
Bug fixes
* Disable heap shrinking by default to avoid bug in glibc malloc
* Skip elflink calls in setup_libhugetlbfs for IA64 and sparc64
* Replace gethugepagesize with check_hugepagesize for error checking
* Make morecore argument a long to handle larger page sizes
Test suite fixes
* Check uid/gid in tests where it matters
* tests: verify there are enough huge pages
* Change tests to read /proc/meminfo
* tests: verify that huge page size isn't too big for the test
libhugetlbfs 1.2 "Mango Habanero"
======================================================================
New features
* Partial segment remapping. This allows non-relinked binaries to try
to take advantage of libhugetlbfs' segment remapping code. Large
segments are required, especially on Power. This feature is useful
for estimating huge page performance, however full relinking will
still perform better.
* Add extra debugging for binaries that may run out of address space.
* Log library version when HUGETLB_VERBOSE is enabled.
* Beginning support for ia64 and sparc64.
* New test to check handling of misaligned mmap() parameters.
Bug fixes
* Fix EH_FRAME segment. Fixes some C++ applications.
* Rework PLT detection to work better on Power.
* Add per-target-arch syscall stubs to the library. These provide
reliable error messages from elflink.c if they occur while the
program segments are unmapped.
* Add proper SONAME to shared libs.
* Makefile respects CFLAGS/LDFLAGS/CPPFLAGS environment variables.
* Make mlock() failure non-fatal.
Test suite fixes
* Fix zero_filesize_segment test.
* Fix the icache-hygeine testcase for i386 and x86_64.
* Fix SEGVs in task-size-overrun test.
* Enable stack_grow_into_huge test, previously skipped.
* Fix test_addr_huge() for anon pages.
libhugetlbfs 1.1 "Carribbean Jerk"
======================================================================
This large release brings several performance improvements
Security
* Remove the sharing daemon completely and rework the segment sharing
code. Permissions on the hugetlbfs mountpoint are used to enforce
segment sharing.
Bug fixes
* Sharing of writable segments is no longer possible, due to address
space randomization on x86_64 (although similar issues could happen on
any architecture).
* minimal_copy detection should work better in this release.
Trivial but notable changes
* Testcase updates
libhugetlbfs 1.0.1 "Spicy Garlic"
======================================================================
This small maintenance release brings a security fix, a few minor bug
fixes, plus some documentation and error message updates.
Security
* A section on security has been added to the README file
* The hugetlbd daemon socket has been moved from /tmp to /var/run.
This will require the daemon to be run as root, which was previously
just a recommendation.
Bug fixes
* Reduce reserved huge pages needed for application start-up
* PPC linker script fixes
Trivial but notable changes
* Always install linker scripts for all targets
* Error message updates
* Add documentation on HUGETLB_DEBUG
* Testcase updates
libhugetlbfs 1.0
======================================================================
* First stable release