mmotm 2022-02-11-15-07 uploaded

The mm-of-the-moment snapshot 2022-02-11-15-07 has been uploaded to

https://www.ozlabs.org/~akpm/mmotm/

mmotm-readme.txt says

README for mm-of-the-moment:

https://www.ozlabs.org/~akpm/mmotm/

This is a snapshot of my -mm patch queue. Uploaded at random hopefully more than once a week.

You will need quilt to apply these patches to the latest Linus release (5.x or 5.x-rcY). The series file is in broken-out.tar.gz and is duplicated in
https://ozlabs.org/~akpm/mmotm/series

The file broken-out.tar.gz contains two datestamp files: .DATE and .DATE-yyyy-mm-dd-hh-mm-ss. Both contain the string yyyy-mm-dd-hh-mm-ss, followed by the base kernel version against which this patch series is to be applied.

This tree is partially included in linux-next. To see which patches are included in linux-next, consult the `series' file. Only the patches within the #NEXT_PATCHES_START/#NEXT_PATCHES_END markers are included in linux-next.

A full copy of the full kernel tree with the linux-next and mmotm patches already applied is available through git within an hour of the mmotm release. Individual mmotm releases are tagged. The master branch always points to the latest release, so it's constantly rebasing.

https://github.com/hnaz/linux-mm

The directory https://www.ozlabs.org/~akpm/mmots/ (mm-of-the-second) contains daily snapshots of the -mm tree. It is updated more frequently than mmotm, and is untested.

A git copy of this tree is also available at

https://github.com/hnaz/linux-mm

This mmotm tree contains the following patches against 5.17-rc3:
(patches marked "*" will be included in linux-next)

origin.patch
* fs-binfmt_elf-fix-pt_load-p_align-values-for-loaders.patch
* fs-proc-task_mmuc-dont-read-mapcount-for-migration-entry.patch
* fs-proc-task_mmuc-dont-read-mapcount-for-migration-entry-v4.patch
* proc-avoid-unused-variable-warning-in-pagemap_pmd_range.patch
* mm-vmscan-remove-deadlock-due-to-throttling-failing-to-make-progress.patch
* mm-memcg-synchronize-objcg-lists-with-a-dedicated-spinlock.patch
* coredump-also-dump-first-pages-of-non-executable-elf-libraries.patch
* mm-fix-panic-in-__alloc_pages.patch
* selftests-vm-cleanup-hugetlb-file-after-mremap-test.patch
* mm-hugetlb-fix-kernel-crash-with-hugetlb-mremap.patch
* kasan-test-prevent-cache-merging-in-kmem_cache_double_destroy.patch
* kfence-make-test-case-compatible-with-run-time-set-sample-interval.patch
* mm-fix-use-after-free-when-anon-vma-name-is-used-after-vma-is-freed.patch
* selftests-exec-add-non-regular-to-test_gen_progs.patch
* hugetlbfs-fix-a-truncation-issue-in-hugepages-parameter.patch
* proc-kpageflags-prevent-an-integer-overflow-in-stable_page_flags.patch
* proc-kpageflags-do-not-use-uninitialized-struct-pages.patch
* procfs-prevent-unpriveleged-processes-accessing-fdinfo-dir.patch
* ntfs-add-sanity-check-on-allocation-size.patch
* ocfs2-cleanup-some-return-variables.patch
* ocfs2-reflink-deadlock-when-clone-file-to-the-same-directory-simultaneously.patch
* ocfs2-clear-links-count-in-ocfs2_mknod-if-an-error-occurs.patch
* ocfs2-fix-ocfs2-corrupt-when-iputting-an-inode.patch
* remove-inode_congested.patch
* remove-bdi_congested-and-wb_congested-and-related-functions.patch
* remove-bdi_congested-and-wb_congested-and-related-functions-fix.patch
* remove-bdi_congested-and-wb_congested-and-related-functions-fix-2.patch
* f2fs-change-retry-waiting-for-f2fs_write_single_data_page.patch
* f2f2-replace-some-congestion_wait-calls-with-io_schedule_timeout.patch
* cephfs-dont-set-clear-bdi_congestion.patch
* fuse-dont-set-clear-bdi_congested.patch
* nfs-remove-congestion-control.patch
* block-bfq-ioschedc-use-false-rather-than-blk_rw_async.patch
* remove-congestion-tracking-framework.patch
* mount-warn-only-once-about-timestamp-range-expiration.patch
mm.patch
* kasan-page_alloc-deduplicate-should_skip_kasan_poison.patch
* kasan-page_alloc-move-tag_clear_highpage-out-of-kernel_init_free_pages.patch
* kasan-page_alloc-merge-kasan_free_pages-into-free_pages_prepare.patch
* kasan-page_alloc-simplify-kasan_poison_pages-call-site.patch
* kasan-page_alloc-init-memory-of-skipped-pages-on-free.patch
* kasan-drop-skip_kasan_poison-variable-in-free_pages_prepare.patch
* mm-clarify-__gfp_zerotags-comment.patch
* kasan-only-apply-__gfp_zerotags-when-memory-is-zeroed.patch
* kasan-page_alloc-refactor-init-checks-in-post_alloc_hook.patch
* kasan-page_alloc-merge-kasan_alloc_pages-into-post_alloc_hook.patch
* kasan-page_alloc-combine-tag_clear_highpage-calls-in-post_alloc_hook.patch
* kasan-page_alloc-move-setpageskipkasanpoison-in-post_alloc_hook.patch
* kasan-page_alloc-move-kernel_init_free_pages-in-post_alloc_hook.patch
* kasan-page_alloc-rework-kasan_unpoison_pages-call-site.patch
* kasan-clean-up-metadata-byte-definitions.patch
* kasan-define-kasan_vmalloc_invalid-for-sw_tags.patch
* kasan-x86-arm64-s390-rename-functions-for-modules-shadow.patch
* kasan-vmalloc-drop-outdated-vm_kasan-comment.patch
* kasan-reorder-vmalloc-hooks.patch
* kasan-add-wrappers-for-vmalloc-hooks.patch
* kasan-vmalloc-reset-tags-in-vmalloc-functions.patch
* kasan-fork-reset-pointer-tags-of-vmapped-stacks.patch
* kasan-arm64-reset-pointer-tags-of-vmapped-stacks.patch
* kasan-vmalloc-add-vmalloc-tagging-for-sw_tags.patch
* kasan-vmalloc-arm64-mark-vmalloc-mappings-as-pgprot_tagged.patch
* kasan-vmalloc-unpoison-vm_alloc-pages-after-mapping.patch
* kasan-mm-only-define-___gfp_skip_kasan_poison-with-hw_tags.patch
* kasan-page_alloc-allow-skipping-unpoisoning-for-hw_tags.patch
* kasan-page_alloc-allow-skipping-memory-init-for-hw_tags.patch
* kasan-vmalloc-add-vmalloc-tagging-for-hw_tags.patch
* kasan-vmalloc-only-tag-normal-vmalloc-allocations.patch
* kasan-arm64-dont-tag-executable-vmalloc-allocations.patch
* kasan-mark-kasan_arg_stacktrace-as-__initdata.patch
* kasan-clean-up-feature-flags-for-hw_tags-mode.patch
* kasan-add-kasanvmalloc-command-line-flag.patch
* kasan-allow-enabling-kasan_vmalloc-and-sw-hw_tags.patch
* arm64-select-kasan_vmalloc-for-sw-hw_tags-modes.patch
* kasan-documentation-updates.patch
* kasan-improve-vmalloc-tests.patch
* kasan-improve-vmalloc-tests-fix.patch
* mm-memremap-avoid-calling-kasan_remove_zero_shadow-for-device-private-memory.patch
* tools-vm-page_owner_sortc-sort-by-stacktrace-before-culling.patch
* tools-vm-page_owner_sortc-sort-by-stacktrace-before-culling-fix.patch
* tools-vm-page_owner_sortc-support-sorting-by-stack-trace.patch
* tools-vm-page_owner_sortc-add-switch-between-culling-by-stacktrace-and-txt.patch
* tools-vm-page_owner_sortc-support-sorting-pid-and-time.patch
* tools-vm-page_owner_sortc-two-trivial-fixes.patch
* tools-vm-page_owner_sortc-delete-invalid-duplicate-code.patch
* documentation-vm-page_ownerrst-update-the-documentation.patch
* documentation-vm-page_ownerrst-update-the-documentation-fix.patch
* docs-vm-fix-unexpected-indentation-warns-in-page_owner.patch
* lib-vsprintf-avoid-redundant-work-with-0-size.patch
* mm-page_owner-use-scnprintf-to-avoid-excessive-buffer-overrun-check.patch
* mm-page_owner-print-memcg-information.patch
* mm-page_owner-record-task-command-name.patch
* mm-unexport-page_init_poison.patch
* mm-move-page-writeback-sysctls-to-is-own-file.patch
* mm-move-page-writeback-sysctls-to-is-own-file-checkpatch-fixes.patch
* mm-move-page-writeback-sysctls-to-is-own-file-fix.patch
* filemap-remove-find_get_pages.patch
* mm-fix-invalid-page-pointer-returned-with-foll_pin-gups.patch
* mm-gup-follow_pfn_pte-eexist-cleanup.patch
* mm-gup-remove-unused-pin_user_pages_locked.patch
* mm-change-lookup_node-to-use-get_user_pages_fast.patch
* mm-gup-remove-unused-get_user_pages_locked.patch
* tmpfs-support-for-file-creation-time.patch
* memcg-replace-in_interrupt-with-in_task.patch
* memcg-add-per-memcg-total-kernel-memory-stat.patch
* memcg-add-per-memcg-total-kernel-memory-stat-v2.patch
* mm-memcg-mem_cgroup_per_node-is-already-set-to-0-on-allocation.patch
* mm-memcg-retrieve-parent-memcg-from-cssparent.patch
* mm-generalize-arch_has_filter_pgprot.patch
* mm-optimize-do_wp_page-for-exclusive-pages-in-the-swapcache.patch
* mm-optimize-do_wp_page-for-fresh-pages-in-local-lru-pagevecs.patch
* mm-slightly-clarify-ksm-logic-in-do_swap_page.patch
* mm-streamline-cow-logic-in-do_swap_page.patch
* mm-huge_memory-streamline-cow-logic-in-do_huge_pmd_wp_page.patch
* mm-khugepaged-remove-reuse_swap_page-usage.patch
* mm-swapfile-remove-stale-reuse_swap_page.patch
* mm-huge_memory-remove-stale-page_trans_huge_mapcount.patch
* mm-huge_memory-remove-stale-locking-logic-from-__split_huge_pmd.patch
* mm-merge-pte_mkhuge-call-into-arch_make_huge_pte.patch
* mm-remove-mmu_gathers-storage-from-remaining-architectures.patch
* mm-thp-fix-wrong-cache-flush-in-remove_migration_pmd.patch
* mm-fix-missing-cache-flush-for-all-tail-pages-of-compound-page.patch
* mm-hugetlb-fix-missing-cache-flush-in-copy_huge_page_from_user.patch
* mm-hugetlb-fix-missing-cache-flush-in-hugetlb_mcopy_atomic_pte.patch
* mm-shmem-fix-missing-cache-flush-in-shmem_mfill_atomic_pte.patch
* mm-userfaultfd-fix-missing-cache-flush-in-mcopy_atomic_pte-and-__mcopy_atomic.patch
* mm-replace-multiple-dcache-flush-with-flush_dcache_folio.patch
* mm-sparse-make-mminit_validate_memmodel_limits-static.patch
* mm-sparsemem-fix-mem_section-will-never-be-null-gcc-12-warning.patch
* mm-sparsemem-fix-mem_section-will-never-be-null-gcc-12-warning-v2.patch
* mm-vmalloc-remove-unneeded-function-forward-declaration.patch
* mm-vmalloc-move-draining-areas-out-of-caller-context.patch
* mm-vmalloc-add-adjust_search_size-parameter.patch
* mm-vmalloc-eliminate-an-extra-orig_gfp_mask.patch
* mm-vmallocc-fix-unused-function-warning.patch
* vmap-dont-allow-invalid-pages.patch
* mm-page_alloc-avoid-merging-non-fallbackable-pageblocks-with-others.patch
* mm-page_alloc-add-same-penalty-is-enough-to-get-round-robin-order.patch
* mm-page_alloc-add-penalty-to-local_node.patch
* mm-mmzonec-use-try_cmpxchg-in-page_cpupid_xchg_last.patch
* mm-discard-__gfp_atomic.patch
* mm-mmzoneh-remove-unused-macros.patch
* mm-page_alloc-dont-pass-pfn-to-free_unref_page_commit.patch
* mm-hwpoison-remove-obsolete-comment.patch
* mm-hwpoison-fix-error-page-recovered-but-reported-not-recovered.patch
* mm-hugetlb-free-the-2nd-vmemmap-page-associated-with-each-hugetlb-page.patch
* mm-hugetlb-replace-hugetlb_free_vmemmap_enabled-with-a-static_key.patch
* mm-sparsemem-use-page-table-lock-to-protect-kernel-pmd-operations.patch
* selftests-vm-add-a-hugetlb-test-case.patch
* mm-sparsemem-move-vmemmap-related-to-hugetlb-to-config_hugetlb_page_free_vmemmap.patch
* mm-hugetlb-generalize-arch_want_general_hugetlb.patch
* mm-mempolicy-convert-from-atomic_t-to-refcount_t-on-mempolicy-refcnt.patch
* mm-mempolicy-convert-from-atomic_t-to-refcount_t-on-mempolicy-refcnt-fix.patch
* mm-migration-add-trace-events-for-thp-migrations.patch
* mm-migration-add-trace-events-for-base-page-and-hugetlb-migrations.patch
* mmmigrate-fix-establishing-demotion-target.patch
* mm-cma-provide-option-to-opt-out-from-exposing-pages-on-activation-failure.patch
* powerpc-fadump-opt-out-from-freeing-pages-on-cma-activation-failure.patch
* numa-balancing-add-page-promotion-counter.patch
* numa-balancing-optimize-page-placement-for-memory-tiering-system.patch
* numa-balancing-optimize-page-placement-for-memory-tiering-system-fix.patch
* numa-balancing-optimize-page-placement-for-memory-tiering-system-fix-fix.patch
* numa-balancing-optimize-page-placement-for-memory-tiering-system-fix-fix-fix.patch
* memory-tiering-skip-to-scan-fast-memory.patch
* mm-vmstat-add-event-for-ksm-swapping-in-copy.patch
* mm-hwpoison-check-the-subpage-not-the-head-page.patch
* mm-balloon_compaction-make-balloon-page-compaction-callbacks-static.patch
* mm-fix-race-between-madv_free-reclaim-and-blkdev-direct-io-read.patch
* mm-memory_hotplug-make-arch_alloc_nodedata-independent-on-config_memory_hotplug.patch
* mm-handle-uninitialized-numa-nodes-gracefully.patch
* mm-handle-uninitialized-numa-nodes-gracefully-fix.patch
* mm-memory_hotplug-drop-arch_free_nodedata.patch
* mm-memory_hotplug-reorganize-new-pgdat-initialization.patch
* mm-make-free_area_init_node-aware-of-memory-less-nodes.patch
* memcg-do-not-tweak-node-in-alloc_mem_cgroup_per_node_info.patch
* drivers-base-memory-add-memory-block-to-memory-group-after-registration-succeeded.patch
* drivers-base-node-consolidate-node-device-subsystem-initialization-in-node_dev_init.patch
* mm-memory_hotplug-remove-obsolete-comment-of-__add_pages.patch
* mm-memory_hotplug-remove-obsolete-comment-of-__add_pages-fix.patch
* mm-memory_hotplug-avoid-calling-zone_intersects-for-zone_normal.patch
* mm-memory_hotplug-clean-up-try_offline_node.patch
* mm-memory_hotplug-fix-misplaced-comment-in-offline_pages.patch
* drivers-base-node-rename-link_mem_sections-to-register_memory_block_under_node.patch
* drivers-base-memory-determine-and-store-zone-for-single-zone-memory-blocks.patch
* mm-munlock-delete-page_mlock-and-all-its-works.patch
* mm-munlock-delete-foll_mlock-and-foll_populate.patch
* mm-munlock-delete-munlock_vma_pages_all-allow-oomreap.patch
* mm-munlock-rmap-call-mlock_vma_page-munlock_vma_page.patch
* mm-munlock-replace-clear_page_mlock-by-final-clearance.patch
* mm-munlock-maintain-page-mlock_count-while-unevictable.patch
* mm-munlock-mlock_pte_range-when-mlocking-or-munlocking.patch
* mm-migrate-__unmap_and_move-push-good-newpage-to-lru.patch
* mm-munlock-delete-smp_mb-from-__pagevec_lru_add_fn.patch
* mm-munlock-mlock_page-munlock_page-batch-by-pagevec.patch
* mm-munlock-mlock_page-munlock_page-batch-by-pagevec-fix.patch
* mm-munlock-mlock_page-munlock_page-batch-by-pagevec-fix-2.patch
* mm-munlock-page-migration-needs-mlock-pagevec-drained.patch
* mm-thp-collapse_file-do-try_to_unmapttu_batch_flush.patch
* mm-thp-shrink_page_list-avoid-splitting-vm_locked-thp.patch
* mm-rmap-convert-from-atomic_t-to-refcount_t-on-anon_vma-refcount.patch
* mm-zswapc-allow-handling-just-same-value-filled-pages.patch
* mm-remove-usercopy_warn.patch
* mm-outline-copy_overflow.patch
* mm-outline-copy_overflow-fix.patch
* highmem-document-kunmap_local.patch
* highmem-document-kunmap_local-v2.patch
* mm-highmem-remove-unnecessary-done-label.patch
* mm-hmmc-remove-unneeded-local-variable-ret.patch
* mm-remove-a-pointless-config_zone_device-check-in-memremap_pages.patch
* mm-remove-the-__kernel__-guard-from-linux-mmh.patch
* mm-remove-pointless-includes-from-linux-hmmh.patch
* mm-move-free_devmap_managed_page-to-memremapc.patch
* mm-simplify-freeing-of-devmap-managed-pages.patch
* mm-dont-include-linux-memremaph-in-linux-mmh.patch
* mm-dont-include-linux-memremaph-in-linux-mmh-fix.patch
* mm-remove-the-extra-zone_device-struct-page-refcount.patch
* fsdax-depend-on-zone_device-fs_dax_limited.patch
* mm-generalize-the-pgmap-based-page_free-infrastructure.patch
* mm-refactor-check_and_migrate_movable_pages.patch
* mm-refactor-the-zone_device-handling-in-migrate_vma_insert_page.patch
* mm-refactor-the-zone_device-handling-in-migrate_vma_pages.patch
* mm-move-the-migrate_vma_-device-migration-code-into-its-own-file.patch
* mm-build-migrate_vma_-for-all-configs-with-zone_device-support.patch
* mm-add-zone-device-coherent-type-memory-support.patch
* mm-add-device-coherent-vma-selection-for-memory-migration.patch
* mm-gup-fail-get_user_pages-for-longterm-dev-coherent-type.patch
* drm-amdkfd-add-spm-support-for-svm.patch
* drm-amdkfd-coherent-type-as-sys-mem-on-migration-to-ram.patch
* lib-test_hmm-add-ioctl-to-get-zone-device-type.patch
* lib-test_hmm-add-module-param-for-zone-device-type.patch
* lib-add-support-for-device-coherent-type-in-test_hmm.patch
* tools-update-hmm-test-to-support-device-coherent-type.patch
* tools-update-test_hmm-script-to-support-sp-config.patch
* mm-remove-the-vma-check-in-migrate_vma_setup.patch
* mm-gup-migrate-device-coherent-pages-when-pinning-instead-of-failing.patch
* mm-damon-dbgfs-init_regions-use-target-index-instead-of-target-id.patch
* docs-admin-guide-mm-damon-usage-update-for-changed-initail_regions-file-input.patch
* mm-damon-core-move-damon_set_targets-into-dbgfs.patch
* mm-damon-remove-the-target-id-concept.patch
* mm-damon-remove-redundant-page-validation.patch
* info-task-hung-in-generic_file_write_iter.patch
* info-task-hung-in-generic_file_write-fix.patch
* kernel-hung_taskc-monitor-killed-tasks.patch
* proc-alloc-path_max-bytes-for-proc-pid-fd-symlinks.patch
* proc-alloc-path_max-bytes-for-proc-pid-fd-symlinks-fix.patch
* proc-vmcore-fix-possible-deadlock-on-concurrent-mmap-and-read.patch
* proc-vmcore-fix-vmcore_alloc_buf-kernel-doc-comment.patch
* proc-sysctl-make-protected_-world-readable.patch
* kconfigdebug-make-debug_info-selectable-from-a-choice.patch
* kconfigdebug-make-debug_info-selectable-from-a-choice-fix.patch
* include-drop-pointless-__compiler_offsetof-indirection.patch
* ilog2-force-inlining-of-__ilog2_u32-and-__ilog2_u64.patch
* bitfield-add-explicit-inclusions-to-the-example.patch
* lz4-fix-lz4_decompress_safe_partial-read-out-of-bound.patch
* checkpatch-prefer-module_licensegpl-over-module_licensegpl-v2.patch
* checkpatch-add-fix-option-for-some-trailing_statements.patch
* scripts-checkpatchpl-remove-_deferred-and-_deferred_once-false-warning.patch
* fs-binfmt_elf-fix-at_phdr-for-unusual-elf-files.patch
* fs-binfmt_elf-fix-at_phdr-for-unusual-elf-files-v5.patch
* fs-binfmt_elf-refactor-load_elf_binary-function.patch
* elf-fix-overflow-in-total-mapping-size-calculation.patch
* kallsyms-print-module-name-in-%ps-s-case-when-kallsyms-is-disabled.patch
* init-use-ktime_us_delta-to-make-initcall_debug-log-more-precise.patch
* init-mainc-silence-some-wunused-parameter-warnings.patch
* fs-pipe-use-kvcalloc-to-allocate-a-pipe_buffer-array.patch
* fs-pipe-local-vars-has-to-match-types-of-proper-pipe_inode_info-fields.patch
* minix-fix-bug-when-opening-a-file-with-o_direct.patch
* exec-force-single-empty-string-when-argv-is-empty.patch
* exec-force-single-empty-string-when-argv-is-empty-fix.patch
* selftests-exec-test-for-empty-string-on-null-argv.patch
* kexec-make-crashk_res-crashk_low_res-and-crash_notes-symbols-always-visible.patch
* riscv-mm-init-use-is_enabledconfig_kexec_core-instead-of-ifdef.patch
* x86-setup-use-is_enabledconfig_kexec_core-instead-of-ifdef.patch
* arm64-mm-use-is_enabledconfig_kexec_core-instead-of-ifdef.patch
* docs-kdump-update-description-about-sysfs-file-system-support.patch
* docs-kdump-add-scp-example-to-write-out-the-dump-file.patch
* panic-unset-panic_on_warn-inside-panic.patch
* ubsan-no-need-to-unset-panic_on_warn-in-ubsan_epilogue.patch
* kasan-no-need-to-unset-panic_on_warn-in-end_report.patch
* docs-sysctl-kernel-add-missing-bit-to-panic_print.patch
* docs-sysctl-kernel-add-missing-bit-to-panic_print-fix.patch
* panic-add-option-to-dump-all-cpus-backtraces-in-panic_print.patch
* panic-allow-printing-extra-panic-information-on-kdump.patch
* kcov-split-ioctl-handling-into-locked-and-unlocked-parts.patch
* kcov-properly-handle-subsequent-mmap-calls.patch
* selftests-set-the-build-variable-to-absolute-path.patch
* selftests-add-and-export-a-kernel-uapi-headers-path.patch
* selftests-correct-the-headers-install-path.patch
* selftests-futex-add-the-uapi-headers-include-variable.patch
* selftests-kvm-add-the-uapi-headers-include-variable.patch
* selftests-landlock-add-the-uapi-headers-include-variable.patch
* selftests-net-add-the-uapi-headers-include-variable.patch
* selftests-mptcp-add-the-uapi-headers-include-variable.patch
* selftests-vm-add-the-uapi-headers-include-variable.patch
* selftests-vm-remove-dependecy-from-internal-kernel-macros.patch
* selftests-kselftest-framework-provide-finished-helper.patch
* revert-ubsan-kcsan-dont-combine-sanitizer-with-kcov-on-clang.patch
* ipc-mqueue-use-get_tree_nodev-in-mqueue_get_tree.patch
linux-next.patch
linux-next-rejects.patch
make-sure-nobodys-leaking-resources.patch releasing-resources-with-children.patch mutex-subsystem-synchro-test-module.patch mutex-subsystem-synchro-test-module-fix.patch kernel-forkc-export-kernel_thread-to-modules.patch workaround-for-a-pci-restoring-bug.patch

on x86_64:

$ gcc --version
gcc (SUSE Linux) 7.5.0

vmlinux.o: warning: objtool: fixup_bad_iret()+0x72: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: noist_exc_debug()+0x30: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: exc_nmi()+0x14e: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: poke_int3_handler()+0x55: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: __sev_get_ghcb()+0x1b: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: __sev_put_ghcb()+0x18: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: __sev_es_ist_exit()+0x2b: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: kernel_exc_vmm_communication()+0x4f: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: rcu_dynticks_eqs_exit()+0x2c: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: rcu_dynticks_eqs_enter()+0x29: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: rcu_eqs_exit.constprop.62()+0x1a: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: rcu_eqs_enter.constprop.63()+0x23: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: rcu_nmi_enter()+0x17: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: irqentry_nmi_enter()+0x36: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: irqentry_nmi_exit()+0xa1: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: enter_from_user_mode()+0x4f: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: syscall_enter_from_user_mode()+0x53: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: syscall_enter_from_user_mode_prepare()+0x4f: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: irqentry_enter_from_user_mode()+0x4f: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: context_tracking_recursion_enter()+0x67: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: __context_tracking_enter()+0x2c: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: fixup_bad_iret()+0x72: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: noist_exc_debug()+0x30: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: exc_nmi()+0x14e: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: poke_int3_handler()+0x55: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: __sev_get_ghcb()+0x1b: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: __sev_put_ghcb()+0x18: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: __sev_es_ist_exit()+0x2b: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: kernel_exc_vmm_communication()+0x4f: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: rcu_dynticks_eqs_exit()+0x2c: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: rcu_dynticks_eqs_enter()+0x29: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: rcu_eqs_exit.constprop.62()+0x1a: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: rcu_eqs_enter.constprop.63()+0x23: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: rcu_nmi_enter()+0x17: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: irqentry_nmi_enter()+0x36: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: irqentry_nmi_exit()+0xa1: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: enter_from_user_mode()+0x4f: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: syscall_enter_from_user_mode()+0x53: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: syscall_enter_from_user_mode_prepare()+0x4f: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: irqentry_enter_from_user_mode()+0x4f: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: context_tracking_recursion_enter()+0x67: call to ftrace_likely_update() leaves .noinstr.text section vmlinux.o: warning: objtool: __context_tracking_enter()+0x2c: call to ftrace_likely_update() leaves .noinstr.text section

Full randconfig file is attached.

~Randy

Yes, TRACE_BRANCH_PROFILING and PROFILE_ALL_BRANCHES are fundamentally broken and I have no intention of trying to fix them.

The moment we pull PTI into noinstr C code this will result in insta boot fail.

Actually, I don't think anyone has every used the "tracers" for this, and I will be happy to get rid of it:

void ftrace_likely_update(struct ftrace_likely_data *f, int val,
int expect, int is_constant)

{
	unsigned long flags = user_access_save();

	/* A constant is always correct */
	if (is_constant) {
		f->constant++;
		val = expect;
	}

------8<------
/*
* I would love to have a trace point here instead, but the
* trace point code is so inundated with unlikely and likely
* conditions that the recursive nightmare that exists is too
* much to try to get working. At least for now. */
trace_likely_condition(f, val, expect);
----->8-------

	/* FIXME: Make this atomic! */
	if (val == expect)
		f->data.correct++;
	else
		f->data.incorrect++;

	user_access_restore(flags);
}

EXPORT_SYMBOL(ftrace_likely_update);

The above with the cut lines I added.

I still use the likely and unlikely counters. Would it be possible to mark that function as "noinstr" and still record them (I don't care if there's races where we miss a few or add a few too many). But they have been really affective in finding bad locations of likely and unlikely callers.

As I said. I have no problem with removing the trace portion of that code. It was more of an academic exercise than a useful one, but the counters are still very useful to have.

-- Steve

on x86_64:

$ gcc --version
gcc (SUSE Linux) 7.5.0

vmlinux.o: warning: objtool: mce_start()+0x60: call to cpu_max_bits_warn() leaves .noinstr.text section vmlinux.o: warning: objtool: mce_read_aux()+0x43: call to mca_msr_reg() leaves .noinstr.text section vmlinux.o: warning: objtool: do_machine_check()+0xd9: call to mca_msr_reg() leaves .noinstr.text section vmlinux.o: warning: objtool: enter_from_user_mode()+0x52: call to on_thread_stack() leaves .noinstr.text section vmlinux.o: warning: objtool: syscall_enter_from_user_mode()+0x57: call to on_thread_stack() leaves .noinstr.text section vmlinux.o: warning: objtool: syscall_enter_from_user_mode_prepare()+0x52: call to on_thread_stack() leaves .noinstr.text section vmlinux.o: warning: objtool: irqentry_enter_from_user_mode()+0x52: call to on_thread_stack() leaves .noinstr.text section

Full randconfig file is attached.

~Randy