* mmotm 2020-04-20-22-43 uploaded [not found] <20200420181310.c18b3c0aa4dc5b3e5ec1be10@linux-foundation.org> @ 2020-04-21 5:43 ` Andrew Morton [not found] ` <20200424014753.DfBuzjmzo%akpm@linux-foundation.org> 1 sibling, 0 replies; 5+ messages in thread From: Andrew Morton @ 2020-04-21 5:43 UTC (permalink / raw) To: broonie, linux-fsdevel, linux-kernel, linux-mm, linux-next, mhocko, mm-commits, sfr The mm-of-the-moment snapshot 2020-04-20-22-43 has been uploaded to http://www.ozlabs.org/~akpm/mmotm/ mmotm-readme.txt says README for mm-of-the-moment: http://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 http://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 http://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 5.7-rc2: (patches marked "*" will be included in linux-next) * sh-fix-build-error-in-mm-initc.patch * slub-avoid-redzone-when-choosing-freepointer-location.patch * mm-userfaultfd-disable-userfaultfd-wp-on-x86_32.patch * maintainers-add-an-entry-for-kfifo.patch * mm-hugetlb-fix-a-addressing-exception-caused-by-huge_pte_offset.patch * mm-gup-return-eintr-when-gup-is-interrupted-by-fatal-signals.patch * checkpatch-fix-a-typo-in-the-regex-for-allocfunctions.patch * tools-build-tweak-unused-value-workaround.patch * mm-ksm-fix-null-pointer-dereference-when-ksm-zero-page-is-enabled.patch * mm-shmem-fix-build-without-thp.patch * vmalloc-fix-remap_vmalloc_range-bounds-checks.patch * shmem-fix-possible-deadlocks-on-shmlock_user_lock.patch * mm-shmem-disable-interrupt-when-acquiring-info-lock-in-userfaultfd_copy-path.patch * coredump-fix-null-pointer-dereference-on-coredump.patch * tools-vm-fix-cross-compile-build.patch * proc-kpageflags-prevent-an-integer-overflow-in-stable_page_flags.patch * proc-kpageflags-do-not-use-uninitialized-struct-pages.patch * ipc-mqueuec-change-__do_notify-to-bypass-check_kill_permission-v2.patch * mm-memcg-fix-error-return-value-of-mem_cgroup_css_alloc.patch * mm-memcg-fix-error-return-value-of-mem_cgroup_css_alloc-fix.patch * kcov-cleanup-debug-messages.patch * kcov-fix-potential-use-after-free-in-kcov_remote_start.patch * kcov-move-t-kcov-assignments-into-kcov_start-stop.patch * kcov-move-t-kcov_sequence-assignment.patch * kcov-use-t-kcov_mode-as-enabled-indicator.patch * kcov-collect-coverage-from-interrupts.patch * usb-core-kcov-collect-coverage-from-usb-complete-callback.patch * mm-page_alloc-fix-watchdog-soft-lockups-during-set_zone_contiguous.patch * kernel-kcovc-fix-typos-in-kcov_remote_start-documentation.patch * scripts-decodecode-fix-trapping-instruction-formatting.patch * fs-binfmt_elfc-allocate-initialized-memory-in-fill_thread_core_info.patch * squashfs-squashfs_fsh-replace-zero-length-array-with-flexible-array-member.patch * squashfs-migrate-from-ll_rw_block-usage-to-bio.patch * squashfs-migrate-from-ll_rw_block-usage-to-bio-fix.patch * ocfs2-add-missing-annotation-for-dlm_empty_lockres.patch * drivers-tty-serial-sh-scic-suppress-uninitialized-var-warning.patch * ramfs-support-o_tmpfile.patch * kernel-watchdog-flush-all-printk-nmi-buffers-when-hardlockup-detected.patch mm.patch * usercopy-mark-dma-kmalloc-caches-as-usercopy-caches.patch * mm-slub-fix-corrupted-freechain-in-deactivate_slab.patch * mm-slub-fix-corrupted-freechain-in-deactivate_slab-fix.patch * mm-dump_page-do-not-crash-with-invalid-mapping-pointer.patch * mm-move-readahead-prototypes-from-mmh.patch * mm-return-void-from-various-readahead-functions.patch * mm-ignore-return-value-of-readpages.patch * mm-move-readahead-nr_pages-check-into-read_pages.patch * mm-add-new-readahead_control-api.patch * mm-use-readahead_control-to-pass-arguments.patch * mm-rename-various-offset-parameters-to-index.patch * mm-rename-readahead-loop-variable-to-i.patch * mm-remove-page_offset-from-readahead-loop.patch * mm-put-readahead-pages-in-cache-earlier.patch * mm-add-readahead-address-space-operation.patch * mm-move-end_index-check-out-of-readahead-loop.patch * mm-add-page_cache_readahead_unbounded.patch * mm-document-why-we-dont-set-pagereadahead.patch * mm-use-memalloc_nofs_save-in-readahead-path.patch * fs-convert-mpage_readpages-to-mpage_readahead.patch * btrfs-convert-from-readpages-to-readahead.patch * erofs-convert-uncompressed-files-from-readpages-to-readahead.patch * erofs-convert-compressed-files-from-readpages-to-readahead.patch * ext4-convert-from-readpages-to-readahead.patch * ext4-pass-the-inode-to-ext4_mpage_readpages.patch * f2fs-convert-from-readpages-to-readahead.patch * f2fs-pass-the-inode-to-f2fs_mpage_readpages.patch * fuse-convert-from-readpages-to-readahead.patch * fuse-convert-from-readpages-to-readahead-fix.patch * iomap-convert-from-readpages-to-readahead.patch * mm-swapfile-use-list_prevnext_entry-instead-of-open-coding.patch * mm-swap_state-fix-a-data-race-in-swapin_nr_pages.patch * mm-swap-properly-update-readahead-statistics-in-unuse_pte_range.patch * mm-swapfilec-offset-is-only-used-when-there-is-more-slots.patch * mm-swapfilec-explicitly-show-ssd-non-ssd-is-handled-mutually-exclusive.patch * mm-swapfilec-remove-the-unnecessary-goto-for-ssd-case.patch * mm-swapfilec-simplify-the-calculation-of-n_goal.patch * mm-swapfilec-remove-the-extra-check-in-scan_swap_map_slots.patch * memcg-optimize-memorynuma_stat-like-memorystat.patch * memcg-optimize-memorynuma_stat-like-memorystat-fix.patch * h8300-remove-usage-of-__arch_use_5level_hack.patch * arm-add-support-for-folded-p4d-page-tables.patch * arm64-add-support-for-folded-p4d-page-tables.patch * hexagon-remove-__arch_use_5level_hack.patch * ia64-add-support-for-folded-p4d-page-tables.patch * nios2-add-support-for-folded-p4d-page-tables.patch * openrisc-add-support-for-folded-p4d-page-tables.patch * powerpc-add-support-for-folded-p4d-page-tables.patch * sh-fault-modernize-printing-of-kernel-messages.patch * sh-drop-__pxd_offset-macros-that-duplicate-pxd_index-ones.patch * sh-add-support-for-folded-p4d-page-tables.patch * unicore32-remove-__arch_use_5level_hack.patch * asm-generic-remove-pgtable-nop4d-hackh.patch * mm-remove-__arch_has_5level_hack-and-include-asm-generic-5level-fixuph.patch * mm-gupc-further-document-vma_permits_fault.patch * proc-pid-smaps-add-pmd-migration-entry-parsing.patch * mm-mmap-fix-the-adjusted-length-error.patch * mm-memory-remove-unnecessary-pte_devmap-case-in-copy_one_pte.patch * x86-hyperv-use-vmalloc_exec-for-the-hypercall-page.patch * x86-fix-vmap-arguments-in-map_irq_stack.patch * staging-android-ion-use-vmap-instead-of-vm_map_ram.patch * staging-media-ipu3-use-vmap-instead-of-reimplementing-it.patch * dma-mapping-use-vmap-insted-of-reimplementing-it.patch * powerpc-add-an-ioremap_phb-helper.patch * powerpc-remove-__ioremap_at-and-__iounmap_at.patch * mm-remove-__get_vm_area.patch * mm-unexport-unmap_kernel_range_noflush.patch * mm-rename-config_pgtable_mapping-to-config_zsmalloc_pgtable_mapping.patch * mm-only-allow-page-table-mappings-for-built-in-zsmalloc.patch * mm-pass-addr-as-unsigned-long-to-vb_free.patch * mm-remove-vmap_page_range_noflush-and-vunmap_page_range.patch * mm-rename-vmap_page_range-to-map_kernel_range.patch * mm-dont-return-the-number-of-pages-from-map_kernel_range_noflush.patch * mm-remove-map_vm_range.patch * mm-remove-unmap_vmap_area.patch * mm-remove-the-prot-argument-from-vm_map_ram.patch * mm-enforce-that-vmap-cant-map-pages-executable.patch * gpu-drm-remove-the-powerpc-hack-in-drm_legacy_sg_alloc.patch * mm-remove-the-pgprot-argument-to-__vmalloc.patch * mm-remove-the-prot-argument-to-__vmalloc_node.patch * mm-remove-both-instances-of-__vmalloc_node_flags.patch * mm-remove-__vmalloc_node_flags_caller.patch * mm-remove-__vmalloc_node_flags_caller-fix.patch * mm-switch-the-test_vmalloc-module-to-use-__vmalloc_node.patch * mm-switch-the-test_vmalloc-module-to-use-__vmalloc_node-fix.patch * mm-remove-vmalloc_user_node_flags.patch * mm-remove-vmalloc_user_node_flags-fix.patch * arm64-use-__vmalloc_node-in-arch_alloc_vmap_stack.patch * powerpc-use-__vmalloc_node-in-alloc_vm_stack.patch * s390-use-__vmalloc_node-in-stack_alloc.patch * mm-init-report-kasan-tag-information-stored-in-page-flags.patch * mm-clarify-__gfp_memalloc-usage.patch * mm-memblock-replace-dereferences-of-memblock_regionnid-with-api-calls.patch * mm-make-early_pfn_to_nid-and-related-defintions-close-to-each-other.patch * mm-remove-config_have_memblock_node_map-option.patch * mm-free_area_init-use-maximal-zone-pfns-rather-than-zone-sizes.patch * mm-use-free_area_init-instead-of-free_area_init_nodes.patch * alpha-simplify-detection-of-memory-zone-boundaries.patch * arm-simplify-detection-of-memory-zone-boundaries.patch * arm64-simplify-detection-of-memory-zone-boundaries-for-uma-configs.patch * csky-simplify-detection-of-memory-zone-boundaries.patch * m68k-mm-simplify-detection-of-memory-zone-boundaries.patch * parisc-simplify-detection-of-memory-zone-boundaries.patch * sparc32-simplify-detection-of-memory-zone-boundaries.patch * unicore32-simplify-detection-of-memory-zone-boundaries.patch * xtensa-simplify-detection-of-memory-zone-boundaries.patch * mm-memmap_init-iterate-over-memblock-regions-rather-that-check-each-pfn.patch * mm-memmap_init-iterate-over-memblock-regions-rather-that-check-each-pfn-fix.patch * mm-remove-early_pfn_in_nid-and-config_nodes_span_other_nodes.patch * mm-free_area_init-allow-defining-max_zone_pfn-in-descending-order.patch * mm-rename-free_area_init_node-to-free_area_init_memoryless_node.patch * mm-clean-up-free_area_init_node-and-its-helpers.patch * mm-simplify-find_min_pfn_with_active_regions.patch * docs-vm-update-memory-models-documentation.patch * mm-page_allocc-bad_-is-not-necessary-when-pagehwpoison.patch * mm-page_allocc-bad_flags-is-not-necessary-for-bad_page.patch * mm-page_allocc-rename-free_pages_check_bad-to-check_free_page_bad.patch * mm-page_allocc-rename-free_pages_check-to-check_free_page.patch * mm-page_allocc-extract-check__page_bad-common-part-to-page_bad_reason.patch * mmpage_alloccma-conditionally-prefer-cma-pageblocks-for-movable-allocations.patch * mmpage_alloccma-conditionally-prefer-cma-pageblocks-for-movable-allocations-fix.patch * mm-call-touch_nmi_watchdog-on-max-order-boundaries-in-deferred-init.patch * mm-initialize-deferred-pages-with-interrupts-enabled.patch * mm-call-cond_resched-from-deferred_init_memmap.patch * mm-remove-unused-free_bootmem_with_active_regions.patch * mm-page_allocc-only-tune-sysctl_lowmem_reserve_ratio-value-once-when-changing-it.patch * mm-page_allocc-clear-out-zone-lowmem_reserve-if-the-zone-is-empty.patch * mm-vmstatc-do-not-show-lowmem-reserve-protection-information-of-empty-zone.patch * mm-page_alloc-use-ac-high_zoneidx-for-classzone_idx.patch * mm-page_alloc-integrate-classzone_idx-and-high_zoneidx.patch * mm-page_allocc-use-node_mask_none-in-build_zonelists.patch * mm-rename-gfpflags_to_migratetype-to-gfp_migratetype-for-same-convention.patch * mm-vmscanc-use-update_lru_size-in-update_lru_sizes.patch * hugetlb_cgroup-remove-unused-variable-i.patch * khugepaged-add-self-test.patch * khugepaged-add-self-test-fix.patch * khugepaged-do-not-stop-collapse-if-less-than-half-ptes-are-referenced.patch * khugepaged-drain-all-lru-caches-before-scanning-pages.patch * khugepaged-drain-lru-add-pagevec-after-swapin.patch * khugepaged-allow-to-collapse-a-page-shared-across-fork.patch * khugepaged-allow-to-collapse-pte-mapped-compound-pages.patch * thp-change-cow-semantics-for-anon-thp.patch * khugepaged-introduce-max_ptes_shared-tunable.patch * khugepaged-introduce-max_ptes_shared-tunable-fix.patch * hugetlbfs-add-arch_hugetlb_valid_size.patch * hugetlbfs-move-hugepagesz=-parsing-to-arch-independent-code.patch * hugetlbfs-remove-hugetlb_add_hstate-warning-for-existing-hstate.patch * hugetlbfs-remove-hugetlb_add_hstate-warning-for-existing-hstate-fix.patch * hugetlbfs-clean-up-command-line-processing.patch * mm-thp-dont-need-drain-lru-cache-when-splitting-and-mlocking-thp.patch * powerpc-mm-drop-platform-defined-pmd_mknotpresent.patch * mm-thp-rename-pmd_mknotpresent-as-pmd_mknotvalid.patch * drivers-base-memoryc-cache-memory-blocks-in-xarray-to-accelerate-lookup.patch * drivers-base-memoryc-cache-memory-blocks-in-xarray-to-accelerate-lookup-fix.patch * mm-memory_hotplug-refrain-from-adding-memory-into-an-impossible-node.patch * powerpc-pseries-hotplug-memory-stop-checking-is_mem_section_removable.patch * mm-memory_hotplug-remove-is_mem_section_removable.patch * mm-replace-zero-length-array-with-flexible-array-member.patch * mm-replace-zero-length-array-with-flexible-array-member-fix.patch * mm-memory_hotplug-fix-a-typo-in-comment-recoreded-recorded.patch * mm-ksm-fix-a-typo-in-comment-alreaady-already.patch * mm-ksm-fix-a-typo-in-comment-alreaady-already-v2.patch * mm-mmap-fix-a-typo-in-comment-compatbility-compatibility.patch * mm-hugetlb-fix-a-typo-in-comment-manitained-maintained.patch * mm-hugetlb-fix-a-typo-in-comment-manitained-maintained-v2.patch * mm-hugetlb-fix-a-typo-in-comment-manitained-maintained-v2-checkpatch-fixes.patch * mm-vmsan-fix-some-typos-in-comment.patch * mm-compaction-fix-a-typo-in-comment-pessemistic-pessimistic.patch * mm-memblock-fix-a-typo-in-comment-implict-implicit.patch * mm-list_lru-fix-a-typo-in-comment-numbesr-numbers.patch * mm-filemap-fix-a-typo-in-comment-unneccssary-unnecessary.patch * mm-frontswap-fix-some-typos-in-frontswapc.patch * mm-memcg-fix-some-typos-in-memcontrolc.patch * mm-fix-a-typo-in-comment-strucure-structure.patch * mm-slub-fix-a-typo-in-comment-disambiguiation-disambiguation.patch * mm-sparse-fix-a-typo-in-comment-convienence-convenience.patch * mm-page-writeback-fix-a-typo-in-comment-effictive-effective.patch * mm-memory-fix-a-typo-in-comment-attampt-attempt.patch * mm-use-false-for-bool-variable.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-rename-catch-function-argument.patch * proc-rename-struct-proc_fs_info-to-proc_fs_opts.patch * proc-allow-to-mount-many-instances-of-proc-in-one-pid-namespace.patch * proc-instantiate-only-pids-that-we-can-ptrace-on-hidepid=4-mount-option.patch * proc-add-option-to-mount-only-a-pids-subset.patch * docs-proc-add-documentation-for-hidepid=4-and-subset=pid-options-and-new-mount-behavior.patch * proc-use-human-readable-values-for-hidepid.patch * proc-use-named-enums-for-better-readability.patch * x86-mm-define-mm_p4d_folded.patch * mm-debug-add-tests-validating-architecture-page-table-helpers.patch * mm-debug-add-tests-validating-architecture-page-table-helpers-v17.patch * userc-make-uidhash_table-static.patch * parisc-add-sysctl-file-interface-panic_on_stackoverflow.patch * kernel-hung_taskc-introduce-sysctl-to-print-all-traces-when-a-hung-task-is-detected.patch * dynamic_debug-add-an-option-to-enable-dynamic-debug-for-modules-only.patch * dynamic_debug-add-an-option-to-enable-dynamic-debug-for-modules-only-v2.patch * lib-math-avoid-trailing-n-hidden-in-pr_fmt.patch * lib-add-might_fault-to-strncpy_from_user.patch * lib-optimize-cpumask_local_spread.patch * lib-test_lockupc-make-test_inode-static.patch * checkpatch-additional-maintainer-section-entry-ordering-checks.patch * checkpatch-look-for-c99-comments-in-ctx_locate_comment.patch * fs-binfmt_elf-remove-redundant-elf_map-ifndef.patch * elfnote-mark-all-note-sections-shf_alloc.patch * initrdmem=-option-to-specify-initrd-physical-address.patch * initrdmem=-option-to-specify-initrd-physical-address-checkpatch-fixes.patch * fat-dont-allow-to-mount-if-the-fat-length-==-0.patch * fat-improve-the-readahead-for-fat-entries.patch * fs-seq_filec-seq_read-update-pr_info_ratelimited.patch * umh-fix-refcount-underflow-in-fork_usermode_blob.patch * kexec-prevent-removal-of-memory-in-use-by-a-loaded-kexec-image.patch * mm-memory_hotplug-allow-arch-override-of-non-boot-memory-resource-names.patch * arm64-memory-give-hotplug-memory-a-different-resource-name.patch * panic-add-sysctl-to-dump-all-cpus-backtraces-on-oops-event.patch * kernel-relayc-fix-read_pos-error-when-multiple-readers.patch * aio-simplify-read_events.patch * selftests-x86-pkeys-move-selftests-to-arch-neutral-directory.patch * selftests-vm-pkeys-rename-all-references-to-pkru-to-a-generic-name.patch * selftests-vm-pkeys-move-generic-definitions-to-header-file.patch * selftests-vm-pkeys-move-some-definitions-to-arch-specific-header.patch * selftests-vm-pkeys-make-gcc-check-arguments-of-sigsafe_printf.patch * selftests-vm-pkeys-use-sane-types-for-pkey-register.patch * selftests-vm-pkeys-add-helpers-for-pkey-bits.patch * selftests-vm-pkeys-fix-pkey_disable_clear.patch * selftests-vm-pkeys-fix-assertion-in-pkey_disable_set-clear.patch * selftests-vm-pkeys-fix-alloc_random_pkey-to-make-it-really-random.patch * selftests-vm-pkeys-use-the-correct-huge-page-size.patch * selftests-vm-pkeys-introduce-generic-pkey-abstractions.patch * selftests-vm-pkeys-introduce-powerpc-support.patch * selftests-vm-pkeys-fix-number-of-reserved-powerpc-pkeys.patch * selftests-vm-pkeys-fix-assertion-in-test_pkey_alloc_exhaust.patch * selftests-vm-pkeys-improve-checks-to-determine-pkey-support.patch * selftests-vm-pkeys-associate-key-on-a-mapped-page-and-detect-access-violation.patch * selftests-vm-pkeys-associate-key-on-a-mapped-page-and-detect-write-violation.patch * selftests-vm-pkeys-detect-write-violation-on-a-mapped-access-denied-key-page.patch * selftests-vm-pkeys-introduce-a-sub-page-allocator.patch * selftests-vm-pkeys-test-correct-behaviour-of-pkey-0.patch * selftests-vm-pkeys-override-access-right-definitions-on-powerpc.patch * selftests-vm-pkeys-use-the-correct-page-size-on-powerpc.patch * selftests-vm-pkeys-fix-multilib-builds-for-x86.patch * tools-testing-selftests-vm-remove-duplicate-headers.patch * ipc-msg-add-missing-annotation-for-freeque.patch * ipc-use-a-work-queue-to-free_ipc.patch * ipc-convert-ipcs_idr-to-xarray.patch linux-next.patch linux-next-fix.patch * amdgpu-a-null-mm-does-not-mean-a-thread-is-a-kthread.patch * i915-gvt-remove-unused-xen-bits.patch * kernel-move-use_mm-unuse_mm-to-kthreadc.patch * kernel-move-use_mm-unuse_mm-to-kthreadc-v2.patch * kernel-better-document-the-use_mm-unuse_mm-api-contract.patch * kernel-better-document-the-use_mm-unuse_mm-api-contract-v2.patch * kernel-set-user_ds-in-kthread_use_mm.patch * mm-kmemleak-silence-kcsan-splats-in-checksum.patch * kallsyms-printk-add-loglvl-to-print_ip_sym.patch * alpha-add-show_stack_loglvl.patch * arc-add-show_stack_loglvl.patch * arm-asm-add-loglvl-to-c_backtrace.patch * arm-add-loglvl-to-unwind_backtrace.patch * arm-add-loglvl-to-dump_backtrace.patch * arm-wire-up-dump_backtrace_entrystm.patch * arm-add-show_stack_loglvl.patch * arm64-add-loglvl-to-dump_backtrace.patch * arm64-add-show_stack_loglvl.patch * c6x-add-show_stack_loglvl.patch * csky-add-show_stack_loglvl.patch * h8300-add-show_stack_loglvl.patch * hexagon-add-show_stack_loglvl.patch * ia64-pass-log-level-as-arg-into-ia64_do_show_stack.patch * ia64-add-show_stack_loglvl.patch * m68k-add-show_stack_loglvl.patch * microblaze-add-loglvl-to-microblaze_unwind_inner.patch * microblaze-add-loglvl-to-microblaze_unwind.patch * microblaze-add-show_stack_loglvl.patch * mips-add-show_stack_loglvl.patch * nds32-add-show_stack_loglvl.patch * nios2-add-show_stack_loglvl.patch * openrisc-add-show_stack_loglvl.patch * parisc-add-show_stack_loglvl.patch * powerpc-add-show_stack_loglvl.patch * riscv-add-show_stack_loglvl.patch * s390-add-show_stack_loglvl.patch * sh-add-loglvl-to-dump_mem.patch * sh-remove-needless-printk.patch * sh-add-loglvl-to-printk_address.patch * sh-add-loglvl-to-show_trace.patch * sh-add-show_stack_loglvl.patch * sparc-add-show_stack_loglvl.patch * um-sysrq-remove-needless-variable-sp.patch * um-add-show_stack_loglvl.patch * unicore32-remove-unused-pmode-argument-in-c_backtrace.patch * unicore32-add-loglvl-to-c_backtrace.patch * unicore32-add-show_stack_loglvl.patch * x86-add-missing-const-qualifiers-for-log_lvl.patch * x86-add-show_stack_loglvl.patch * xtensa-add-loglvl-to-show_trace.patch * xtensa-add-show_stack_loglvl.patch * sysrq-use-show_stack_loglvl.patch * x86-amd_gart-print-stacktrace-for-a-leak-with-kern_err.patch * power-use-show_stack_loglvl.patch * kdb-dont-play-with-console_loglevel.patch * sched-print-stack-trace-with-kern_info.patch * kernel-use-show_stack_loglvl.patch * kernel-rename-show_stack_loglvl-=-show_stack.patch * mm-frontswap-mark-various-intentional-data-races.patch * mm-page_io-mark-various-intentional-data-races.patch * mm-page_io-mark-various-intentional-data-races-v2.patch * mm-swap_state-mark-various-intentional-data-races.patch * mm-filemap-fix-a-data-race-in-filemap_fault.patch * mm-swapfile-fix-and-annotate-various-data-races.patch * mm-swapfile-fix-and-annotate-various-data-races-v2.patch * mm-page_counter-fix-various-data-races-at-memsw.patch * mm-memcontrol-fix-a-data-race-in-scan-count.patch * mm-list_lru-fix-a-data-race-in-list_lru_count_one.patch * mm-mempool-fix-a-data-race-in-mempool_free.patch * mm-util-annotate-an-data-race-at-vm_committed_as.patch * mm-rmap-annotate-a-data-race-at-tlb_flush_batched.patch * mm-annotate-a-data-race-in-page_zonenum.patch * mm-swap-annotate-data-races-for-lru_rotate_pvecs.patch * net-zerocopy-use-vm_insert_pages-for-tcp-rcv-zerocopy.patch * mm-mmapc-add-more-sanity-checks-to-get_unmapped_area.patch * mm-mmapc-do-not-allow-mappings-outside-of-allowed-limits.patch * mm-pass-task-and-mm-to-do_madvise.patch * mm-introduce-external-memory-hinting-api.patch * mm-introduce-external-memory-hinting-api-fix.patch * mm-check-fatal-signal-pending-of-target-process.patch * pid-move-pidfd_get_pid-function-to-pidc.patch * mm-support-both-pid-and-pidfd-for-process_madvise.patch * mm-madvise-employ-mmget_still_valid-for-write-lock.patch * mm-madvise-allow-ksm-hints-for-remote-api.patch * fix-read-buffer-overflow-in-delta-ipc.patch make-sure-nobodys-leaking-resources.patch releasing-resources-with-children.patch mutex-subsystem-synchro-test-module.patch kernel-forkc-export-kernel_thread-to-modules.patch workaround-for-a-pci-restoring-bug.patch ^ permalink raw reply [flat|nested] 5+ messages in thread
[parent not found: <20200424014753.DfBuzjmzo%akpm@linux-foundation.org>]
* Re: + ipc-convert-ipcs_idr-to-xarray-update.patch added to -mm tree [not found] ` <20200424014753.DfBuzjmzo%akpm@linux-foundation.org> @ 2020-06-05 19:58 ` Qian Cai 2020-06-05 20:11 ` Matthew Wilcox 0 siblings, 1 reply; 5+ messages in thread From: Qian Cai @ 2020-06-05 19:58 UTC (permalink / raw) To: linux-kernel; +Cc: dave, manfred, mm-commits, willy, akpm On Thu, Apr 23, 2020 at 06:47:53PM -0700, Andrew Morton wrote: > ------------------------------------------------------ > From: "Matthew Wilcox (Oracle)" <willy@infradead.org> > Subject: ipc-convert-ipcs_idr-to-xarray-update > > implemant change suggested by Manfred > > Link: http://lkml.kernel.org/r/20200421183342.GQ5820@bombadil.infradead.org > Signed-off-by: Matthew Wilcox <willy@infradead.org> > Cc: Manfred Spraul <manfred@colorfullife.com> > Cc: Davidlohr Bueso <dave@stgolabs.net> > Signed-off-by: Andrew Morton <akpm@linux-foundation.org> > --- > > include/linux/xarray.h | 1 > ipc/util.c | 52 +++++++++++++++------------------------ > lib/xarray.c | 2 - > 3 files changed, 21 insertions(+), 34 deletions(-) > [] > --- a/ipc/util.c~ipc-convert-ipcs_idr-to-xarray-update > +++ a/ipc/util.c > @@ -210,52 +210,40 @@ static inline int ipc_id_alloc(struct ip > int err; > > if (get_restore_id(ids) < 0) { > - XA_STATE(xas, &ids->ipcs, 0); > - int min_idx, max_idx; > + int max_idx; > > max_idx = max(ids->in_use*3/2, ipc_min_cycle); > max_idx = min(max_idx, ipc_mni) - 1; > > - xas_lock(&xas); > + xa_lock(&ids->ipcs); > > - min_idx = ids->next_idx; > - new->seq = ids->seq; > + err = __xa_alloc_cyclic(&ids->ipcs, &idx, NULL, > + XA_LIMIT(0, max_idx), &ids->next_idx, > + GFP_KERNEL); This will trigger, [ 8853.759549] LTP: starting semget05 [ 8867.257088] BUG: sleeping function called from invalid context at mm/slab.h:567 [ 8867.270259] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 22556, name: semget05 [ 8867.270309] 2 locks held by semget05/22556: [ 8867.270345] #0: 00000000512de7e0 (&ids->rwsem){++++}-{3:3}, at: ipcget+0x4e/0x230 [ 8867.270426] #1: 00000000552b9018 (&new->lock){+.+.}-{2:2}, at: ipc_addid+0xf4/0xf50 [ 8867.270495] CPU: 0 PID: 22556 Comm: semget05 Not tainted 5.7.0-next-20200605 #4 [ 8867.270531] Hardware name: IBM 2964 N96 400 (z/VM 6.4.0) [ 8867.270565] Call Trace: [ 8867.270606] [<000000004ff1ee2a>] show_stack+0x11a/0x1c8 [ 8867.270649] [<00000000505a751c>] dump_stack+0x134/0x180 [ 8867.270692] [<000000004ffba20e>] ___might_sleep+0x3d6/0x400 [ 8867.270732] [<0000000050332ad8>] kmem_cache_alloc+0x2b0/0x560 [ 8867.270772] [<00000000505c6efa>] __xas_nomem+0x10a/0x278 [ 8867.270810] [<00000000505cc408>] __xa_alloc+0x168/0x220 [ 8867.270848] [<00000000505cc5b0>] __xa_alloc_cyclic+0xf0/0x208 __xa_alloc_cyclic at lib/xarray.c:1698 [ 8867.270885] [<00000000504d9b9a>] ipc_addid+0x412/0xf50 ipc_id_alloc at ipc/util.c: 293 [ 8867.272003] [<00000000504e1cf6>] newary+0x246/0x3a0 newary at ipc/sem.c:570 [ 8867.272041] [<00000000504dc030>] ipcget+0x68/0x230 ipcget_new at ipc/util.c:347 (inlined by) ipcget at ipc/util.c:646 [ 8867.272079] [<00000000504e6308>] ksys_semget+0xf8/0x118 [ 8867.273237] [<00000000504eb5bc>] ksys_ipc+0x134/0x310 [ 8867.273276] [<000000004ff08f64>] __s390x_sys_s390_ipc+0x3c/0x50 [ 8867.273321] [<00000000509063c4>] system_call+0xdc/0x29c [ 8867.273355] 2 locks held by semget05/22556: [ 8867.273387] #0: 00000000512de7e0 (&ids->rwsem){++++}-{3:3}, at: ipcget+0x4e/0x230 [ 8867.275205] #1: 00000000552b9018 (&new->lock){+.+.}-{2:2}, at: ipc_addid+0xf4/0xf50 ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: + ipc-convert-ipcs_idr-to-xarray-update.patch added to -mm tree 2020-06-05 19:58 ` + ipc-convert-ipcs_idr-to-xarray-update.patch added to -mm tree Qian Cai @ 2020-06-05 20:11 ` Matthew Wilcox 2020-06-05 21:20 ` Andrew Morton 0 siblings, 1 reply; 5+ messages in thread From: Matthew Wilcox @ 2020-06-05 20:11 UTC (permalink / raw) To: Qian Cai; +Cc: linux-kernel, dave, manfred, mm-commits, akpm On Fri, Jun 05, 2020 at 03:58:48PM -0400, Qian Cai wrote: > This will trigger, > > [ 8853.759549] LTP: starting semget05 > [ 8867.257088] BUG: sleeping function called from invalid context at mm/slab.h:567 > [ 8867.270259] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 22556, name: semget05 > [ 8867.270309] 2 locks held by semget05/22556: > [ 8867.270345] #0: 00000000512de7e0 (&ids->rwsem){++++}-{3:3}, at: ipcget+0x4e/0x230 > [ 8867.270426] #1: 00000000552b9018 (&new->lock){+.+.}-{2:2}, at: ipc_addid+0xf4/0xf50 Did the fix for this not make it into -next? commit f0ef33eea4bbbb4129fe79fd73088b668b6fd947 Author: Matthew Wilcox (Oracle) <willy@infradead.org> Date: Thu Apr 30 15:27:51 2020 -0400 fixes diff --git a/ipc/util.c b/ipc/util.c index 0f6b0e0aa17e..b929ab0072a5 100644 --- a/ipc/util.c +++ b/ipc/util.c @@ -19,8 +19,8 @@ * * General sysv ipc locking scheme: * rcu_read_lock() - * obtain the ipc object (kern_ipc_perm) by looking up the id in an idr - * tree. + * obtain the ipc object (kern_ipc_perm) by looking up the id in an + * xarray. * - perform initial checks (capabilities, auditing and permission, * etc). * - perform read-only operations, such as INFO command, that @@ -209,14 +209,14 @@ static inline int ipc_id_alloc(struct ipc_ids *ids, struct kern_ipc_perm *new) u32 idx; int err; + xa_lock(&ids->ipcs); + if (get_restore_id(ids) < 0) { int max_idx; max_idx = max(ids->in_use*3/2, ipc_min_cycle); max_idx = min(max_idx, ipc_mni) - 1; - xa_lock(&ids->ipcs); - err = __xa_alloc_cyclic(&ids->ipcs, &idx, NULL, XA_LIMIT(0, max_idx), &ids->next_idx, GFP_KERNEL); @@ -224,24 +224,31 @@ static inline int ipc_id_alloc(struct ipc_ids *ids, struct kern_ipc_perm *new) ids->seq++; if (ids->seq >= ipcid_seq_max()) ids->seq = 0; + err = 0; } - if (err >= 0) { + if (!err) { new->seq = ids->seq; new->id = (new->seq << ipcmni_seq_shift()) + idx; - /* xa_store contains a write barrier */ - __xa_store(&ids->ipcs, idx, new, GFP_KERNEL); } - - xa_unlock(&ids->ipcs); } else { new->id = get_restore_id(ids); new->seq = ipcid_to_seqx(new->id); idx = ipcid_to_idx(new->id); - err = xa_insert(&ids->ipcs, idx, new, GFP_KERNEL); + err = __xa_insert(&ids->ipcs, idx, NULL, GFP_KERNEL); set_restore_id(ids, -1); } + /* + * Hold the spinlock so that nobody else can access the object + * once they can find it. xa_store contains a write barrier so + * all previous stores to 'new' will be visible. + */ + spin_lock(&new->lock); + if (!err) + __xa_store(&ids->ipcs, idx, new, GFP_NOWAIT); + xa_unlock(&ids->ipcs); + if (err == -EBUSY) return -ENOSPC; if (err < 0) @@ -255,7 +262,7 @@ static inline int ipc_id_alloc(struct ipc_ids *ids, struct kern_ipc_perm *new) * @new: new ipc permission set * @limit: limit for the number of used ids * - * Add an entry 'new' to the ipc ids idr. The permissions object is + * Add an entry 'new' to the ipc ids. The permissions object is * initialised and the first free entry is set up and the index assigned * is returned. The 'new' entry is returned in a locked state on success. * @@ -270,7 +277,7 @@ int ipc_addid(struct ipc_ids *ids, struct kern_ipc_perm *new, int limit) kgid_t egid; int idx; - /* 1) Initialize the refcount so that ipc_rcu_putref works */ + /* Initialize the refcount so that ipc_rcu_putref works */ refcount_set(&new->refcount, 1); if (limit > ipc_mni) @@ -279,12 +286,7 @@ int ipc_addid(struct ipc_ids *ids, struct kern_ipc_perm *new, int limit) if (ids->in_use >= limit) return -ENOSPC; - /* - * 2) Hold the spinlock so that nobody else can access the object - * once they can find it - */ spin_lock_init(&new->lock); - spin_lock(&new->lock); current_euid_egid(&euid, &egid); new->cuid = new->uid = euid; new->gid = new->cgid = egid; @@ -588,7 +590,7 @@ void ipc64_perm_to_ipc_perm(struct ipc64_perm *in, struct ipc_perm *out) * @ids: ipc identifier set * @id: ipc id to look for * - * Look for an id in the ipc ids idr and return associated ipc object. + * Look for an id in the ipc ids and return associated ipc object. * * Call inside the RCU critical section. * The ipc object is *not* locked on exit. ^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: + ipc-convert-ipcs_idr-to-xarray-update.patch added to -mm tree 2020-06-05 20:11 ` Matthew Wilcox @ 2020-06-05 21:20 ` Andrew Morton 2020-06-10 2:14 ` Matthew Wilcox 0 siblings, 1 reply; 5+ messages in thread From: Andrew Morton @ 2020-06-05 21:20 UTC (permalink / raw) To: Matthew Wilcox; +Cc: Qian Cai, linux-kernel, dave, manfred, mm-commits On Fri, 5 Jun 2020 13:11:34 -0700 Matthew Wilcox <willy@infradead.org> wrote: > On Fri, Jun 05, 2020 at 03:58:48PM -0400, Qian Cai wrote: > > This will trigger, > > > > [ 8853.759549] LTP: starting semget05 > > [ 8867.257088] BUG: sleeping function called from invalid context at mm/slab.h:567 > > [ 8867.270259] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 22556, name: semget05 > > [ 8867.270309] 2 locks held by semget05/22556: > > [ 8867.270345] #0: 00000000512de7e0 (&ids->rwsem){++++}-{3:3}, at: ipcget+0x4e/0x230 > > [ 8867.270426] #1: 00000000552b9018 (&new->lock){+.+.}-{2:2}, at: ipc_addid+0xf4/0xf50 > > Did the fix for this not make it into -next? I don't think I've seen this fix before. And I'm unclear on how it pertains to the current patch(es) in -mm. And it has no changelog! Perhaps it would be best to do a formal send of the latest version? ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: + ipc-convert-ipcs_idr-to-xarray-update.patch added to -mm tree 2020-06-05 21:20 ` Andrew Morton @ 2020-06-10 2:14 ` Matthew Wilcox 0 siblings, 0 replies; 5+ messages in thread From: Matthew Wilcox @ 2020-06-10 2:14 UTC (permalink / raw) To: Andrew Morton; +Cc: Qian Cai, linux-kernel, dave, manfred, mm-commits On Fri, Jun 05, 2020 at 02:20:39PM -0700, Andrew Morton wrote: > On Fri, 5 Jun 2020 13:11:34 -0700 Matthew Wilcox <willy@infradead.org> wrote: > > > On Fri, Jun 05, 2020 at 03:58:48PM -0400, Qian Cai wrote: > > > This will trigger, > > > > > > [ 8853.759549] LTP: starting semget05 > > > [ 8867.257088] BUG: sleeping function called from invalid context at mm/slab.h:567 > > > [ 8867.270259] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 22556, name: semget05 > > > [ 8867.270309] 2 locks held by semget05/22556: > > > [ 8867.270345] #0: 00000000512de7e0 (&ids->rwsem){++++}-{3:3}, at: ipcget+0x4e/0x230 > > > [ 8867.270426] #1: 00000000552b9018 (&new->lock){+.+.}-{2:2}, at: ipc_addid+0xf4/0xf50 > > > > Did the fix for this not make it into -next? > > I don't think I've seen this fix before. And I'm unclear on how it > pertains to the current patch(es) in -mm. And it has no changelog! > > Perhaps it would be best to do a formal send of the latest version? In testing, I discovered a lockdep warning. I don't think it's readily fixable, so please drop this patch for the moment. I'll be back with a patch set that rejiggers the locking in ipc to be more normal. ^ permalink raw reply [flat|nested] 5+ messages in thread
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2020-04-21 5:43 ` mmotm 2020-04-20-22-43 uploaded Andrew Morton
[not found] ` <20200424014753.DfBuzjmzo%akpm@linux-foundation.org>
2020-06-05 19:58 ` + ipc-convert-ipcs_idr-to-xarray-update.patch added to -mm tree Qian Cai
2020-06-05 20:11 ` Matthew Wilcox
2020-06-05 21:20 ` Andrew Morton
2020-06-10 2:14 ` Matthew Wilcox
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