linux/tools/lib, branch master

Merge tag 'perf-tools-for-v7.0-1-2026-02-21' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools

2026-02-21T18:51:08Z

Pull perf tools updates from Arnaldo Carvalho de Melo: - Introduce 'perf sched stats' tool with record/report/diff workflows using schedstat counters - Add a faster libdw based addr2line implementation and allow selecting it or its alternatives via 'perf config addr2line.style=' - Data-type profiling fixes and improvements including the ability to select fields using 'perf report''s -F/-fields, e.g.: 'perf report --fields overhead,type' - Add 'perf test' regression tests for Data-type profiling with C and Rust workloads - Fix srcline printing with inlines in callchains, make sure this has coverage in 'perf test' - Fix printing of leaf IP in LBR callchains - Fix display of metrics without sufficient permission in 'perf stat' - Print all machines in 'perf kvm report -vvv', not just the host - Switch from SHA-1 to BLAKE2s for build ID generation, remove SHA-1 code - Fix 'perf report's histogram entry collapsing with '-F' option - Use system's cacheline size instead of a hardcoded value in 'perf report' - Allow filtering conversion by time range in 'perf data' - Cover conversion to CTF using 'perf data' in 'perf test' - Address newer glibc const-correctness (-Werror=discarded-qualifiers) issues - Fixes and improvements for ARM's CoreSight support, simplify ARM SPE event config in 'perf mem', update docs for 'perf c2c' including the ARM events it can be used with - Build support for generating metrics from arch specific python script, add extra AMD, Intel, ARM64 metrics using it - Add AMD Zen 6 events and metrics - Add JSON file with OpenHW Risc-V CVA6 hardware counters - Add 'perf kvm' stats live testing - Add more 'perf stat' tests to 'perf test' - Fix segfault in `perf lock contention -b/--use-bpf` - Fix various 'perf test' cases for s390 - Build system cleanups, bump minimum shellcheck version to 0.7.2 - Support building the capstone based annotation routines as a plugin - Allow passing extra Clang flags via EXTRA_BPF_FLAGS * tag 'perf-tools-for-v7.0-1-2026-02-21' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools: (255 commits) perf test script: Add python script testing support perf test script: Add perl script testing support perf script: Allow the generated script to be a path perf test: perf data --to-ctf testing perf test: Test pipe mode with data conversion --to-json perf json: Pipe mode --to-ctf support perf json: Pipe mode --to-json support perf check: Add libbabeltrace to the listed features perf build: Allow passing extra Clang flags via EXTRA_BPF_FLAGS perf test data_type_profiling.sh: Skip just the Rust tests if code_with_type workload is missing tools build: Fix feature test for rust compiler perf libunwind: Fix calls to thread__e_machine() perf stat: Add no-affinity flag perf evlist: Reduce affinity use and move into iterator, fix no affinity perf evlist: Missing TPEBS close in evlist__close() perf evlist: Special map propagation for tool events that read on 1 CPU perf stat-shadow: In prepare_metric fix guard on reading NULL perf_stat_evsel Revert "perf tool_pmu: More accurately set the cpus for tool events" tools build: Emit dependencies file for test-rust.bin tools build: Make test-rust.bin be removed by the 'clean' target ...

Merge tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf

2026-02-19T18:36:54Z

Pull bpf fixes from Alexei Starovoitov: - Fix invalid write loop logic in libbpf's bpf_linker__add_buf() (Amery Hung) - Fix a potential use-after-free of BTF object (Anton Protopopov) - Add feature detection to libbpf and avoid moving arena global variables on older kernels (Emil Tsalapatis) - Remove extern declaration of bpf_stream_vprintk() from libbpf headers (Ihor Solodrai) - Fix truncated netlink dumps in bpftool (Jakub Kicinski) - Fix map_kptr grace period wait in bpf selftests (Kumar Kartikeya Dwivedi) - Remove hexdump dependency while building bpf selftests (Matthieu Baerts) - Complete fsession support in BPF trampolines on riscv (Menglong Dong) * tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf: selftests/bpf: Remove hexdump dependency libbpf: Remove extern declaration of bpf_stream_vprintk() selftests/bpf: Use vmlinux.h in test_xdp_meta bpftool: Fix truncated netlink dumps libbpf: Delay feature gate check until object prepare time libbpf: Do not use PROG_TYPE_TRACEPOINT program for feature gating bpf: Add a map/btf from a fd array more consistently selftests/bpf: Fix map_kptr grace period wait selftests/bpf: enable fsession_test on riscv64 selftests/bpf: Adjust selftest due to function rename bpf, riscv: add fsession support for trampolines bpf: Fix a potential use-after-free of BTF object bpf, riscv: introduce emit_store_stack_imm64() for trampoline libbpf: Fix invalid write loop logic in bpf_linker__add_buf() libbpf: Add gating for arena globals relocation feature

Merge tag 'mm-stable-2026-02-18-19-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2026-02-19T04:50:32Z

Pull more MM updates from Andrew Morton: - "mm/vmscan: fix demotion targets checks in reclaim/demotion" fixes a couple of issues in the demotion code - pages were failed demotion and were finding themselves demoted into disallowed nodes (Bing Jiao) - "Remove XA_ZERO from error recovery of dup_mmap()" fixes a rare mapledtree race and performs a number of cleanups (Liam Howlett) - "mm: add bitmap VMA flag helpers and convert all mmap_prepare to use them" implements a lot of cleanups following on from the conversion of the VMA flags into a bitmap (Lorenzo Stoakes) - "support batch checking of references and unmapping for large folios" implements batching to greatly improve the performance of reclaiming clean file-backed large folios (Baolin Wang) - "selftests/mm: add memory failure selftests" does as claimed (Miaohe Lin) * tag 'mm-stable-2026-02-18-19-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (36 commits) mm/page_alloc: clear page->private in free_pages_prepare() selftests/mm: add memory failure dirty pagecache test selftests/mm: add memory failure clean pagecache test selftests/mm: add memory failure anonymous page test mm: rmap: support batched unmapping for file large folios arm64: mm: implement the architecture-specific clear_flush_young_ptes() arm64: mm: support batch clearing of the young flag for large folios arm64: mm: factor out the address and ptep alignment into a new helper mm: rmap: support batched checks of the references for large folios tools/testing/vma: add VMA userland tests for VMA flag functions tools/testing/vma: separate out vma_internal.h into logical headers tools/testing/vma: separate VMA userland tests into separate files mm: make vm_area_desc utilise vma_flags_t only mm: update all remaining mmap_prepare users to use vma_flags_t mm: update shmem_[kernel]_file_*() functions to use vma_flags_t mm: update secretmem to use VMA flags on mmap_prepare mm: update hugetlbfs to use VMA flags on mmap_prepare mm: add basic VMA flag operation helper functions tools: bitmap: add missing bitmap_[subset(), andnot()] mm: add mk_vma_flags() bitmap flag macro helper ...

libbpf: Remove extern declaration of bpf_stream_vprintk()

2026-02-18T22:58:47Z

An issue was reported that building BPF program which includes both vmlinux.h and bpf_helpers.h from libbpf fails due to conflicting declarations of bpf_stream_vprintk(). Remove the extern declaration from bpf_helpers.h to address this. In order to use bpf_stream_printk() macro, BPF programs are expected to either include vmlinux.h of the kernel they are targeting, or add their own extern declaration. Reported-by: Luca Boccassi Closes: https://github.com/libbpf/libbpf/issues/947 Signed-off-by: Ihor Solodrai Link: https://lore.kernel.org/r/20260218215651.2057673-3-ihor.solodrai@linux.dev Signed-off-by: Alexei Starovoitov

bpftool: Fix truncated netlink dumps

2026-02-18T00:54:03Z

Netlink requires that the recv buffer used during dumps is at least min(PAGE_SIZE, 8k) (see the man page). Otherwise the messages will get truncated. Make sure bpftool follows this requirement, avoid missing information on systems with large pages. Acked-by: Quentin Monnet Fixes: 7084566a236f ("tools/bpftool: Remove libbpf_internal.h usage in bpftool") Signed-off-by: Jakub Kicinski Link: https://lore.kernel.org/r/20260217194150.734701-1-kuba@kernel.org Signed-off-by: Alexei Starovoitov

libbpf: Delay feature gate check until object prepare time

2026-02-17T22:20:24Z

Commit 728ff167910e ("libbpf: Add gating for arena globals relocation feature") adds a feature gate check that loads a map and BPF program to test the running kernel supports large direct offsets for LDIMM64 instructions. This check is currently used to calculate arena symbol offsets during bpf_object__collect_relos, itself called by bpf_object_open. However, the program calling bpf_object_open may not have the permissions to load maps and programs. This is the case with the BPF selftests, where bpftool is invoked at compilation time during skeleton generation. This causes errors as the feature gate unexpectedly fails with -EPERM. Avoid this by moving all the use of the FEAT_LDIMM64_FULL_RANGE_OFF feature gate to BPF object preparation time instead. Fixes: 728ff167910e ("libbpf: Add gating for arena globals relocation feature") Signed-off-by: Emil Tsalapatis Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20260217204345.548648-3-emil@etsalapatis.com

libbpf: Do not use PROG_TYPE_TRACEPOINT program for feature gating

2026-02-17T22:17:06Z

Commit 728ff167910e uses a PROG_TYPE_TRACEPOINT BPF test program to check whether the running kernel supports large LDIMM64 offsets. The feature gate incorrectly assumes that the program will fail at verification time with one of two messages, depending on whether the feature is supported by the running kernel. However, PROG_TYPE_TRACEPOINT programs may fail to load before verification even starts, e.g., if the shell does not have the appropriate capabilities. Use a BPF_PROG_TYPE_SOCKET_FILTER program for the feature gate instead. Also fix two minor issues. First, ensure the log buffer for the test is initialized: Failing program load before verification led to libbpf dumping uninitialized data to stdout. Also, ensure that close() is only called for program_fd in the probe if the program load actually succeeded. The call was currently failing silently with -EBADF most of the time. Fixes: 728ff167910e ("libbpf: Add gating for arena globals relocation feature") Reported-by: Alexei Starovoitov Signed-off-by: Emil Tsalapatis Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20260217204345.548648-2-emil@etsalapatis.com

Merge tag 'docs-7.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/docs/linux

2026-02-15T18:47:59Z

Pull documentation fixes from Jonathan Corbet: "A handful of small, late-arriving documentation fixes" * tag 'docs-7.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/docs/linux: docs: toshiba_haps: fix grammar error in SSD warning Docs/mm: fix typos and grammar in page_tables.rst Docs/core-api: fix typos in rbtree.rst docs: clarify wording in programming-language.rst docs: process: maintainer-pgp-guide: update kernel.org docs link docs: kdoc_parser: allow __exit in function prototypes

libbpf: Fix invalid write loop logic in bpf_linker__add_buf()

2026-02-13T22:14:27Z

Fix bpf_linker__add_buf()'s logic of copying data from memory buffer into memfd. In the event of short write not writing entire buf_sz bytes into memfd file, we'll append bytes from the beginning of buf *again* (corrupting ELF file contents) instead of correctly appending the rest of not-yet-read buf contents. Closes: https://github.com/libbpf/libbpf/issues/945 Fixes: 6d5e5e5d7ce1 ("libbpf: Extend linker API to support in-memory ELF files") Signed-off-by: Amery Hung Signed-off-by: Andrii Nakryiko Acked-by: Jiri Olsa Link: https://lore.kernel.org/bpf/20260209230134.3530521-1-ameryhung@gmail.com Signed-off-by: Alexei Starovoitov

libbpf: Add gating for arena globals relocation feature

2026-02-13T22:14:27Z

Add feature gating for the arena globals relocation introduced in commit c1f61171d44b. The commit depends on a previous commit in the same patchset that is absent from older kernels (12a1fe6e12db "bpf/verifier: Do not limit maximum direct offset into arena map"). Without this commit, arena globals relocation with arenas >= 512MiB fails to load and breaks libbpf's backwards compatibility. Introduce a libbpf feature to check whether the running kernel allows for full range ldimm64 offset, and only relocate arena globals if it does. Fixes: c1f61171d44b ("libbpf: Move arena globals to the end of the arena") Signed-off-by: Emil Tsalapatis Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20260210184532.255475-1-emil@etsalapatis.com Signed-off-by: Alexei Starovoitov