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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 |