Hi Andrew FYI,I watched a lockdep warning based on your mmotm master branch[1] [ 6.692731] ------------[ cut here ]------------ [ 6.696391] DEBUG_LOCKS_WARN_ON(!current->hardirqs_enabled) [ 6.696404] WARNING: CPU: 3 PID: 320 at kernel/locking/lockdep.c:3845 check_flags.part.38+0x9c/0x16c [ 6.711082] Modules linked in: [ 6.714101] CPU: 3 PID: 320 Comm: modprobe Not tainted 4.18.0-rc4-mm1+ #56 [ 6.720956] Hardware name: WIWYNN HXT REP-1 System H001-00001-0/HXT REP-1 CRB, BIOS 0ACJA530 03/20/2018 [ 6.730332] pstate: 60400085 (nZCv daIf +PAN -UAO) [ 6.735106] pc : check_flags.part.38+0x9c/0x16c [ 6.739619] lr : check_flags.part.38+0x9c/0x16c [ 6.744133] sp : ffff80178536fbf0 [ 6.747432] x29: ffff80178536fbf0 x28: ffff8017905a1b00 [ 6.752727] x27: 0000000000000002 x26: 0000000000000000 [ 6.758022] x25: ffff000008abeb14 x24: 0000000000000000 [ 6.763317] x23: 0000000000000001 x22: 0000000000000001 [ 6.768612] x21: 0000000000000001 x20: 0000000000000000 [ 6.773908] x19: ffff00000a041000 x18: 0000000000000000 [ 6.779202] x17: 0000000000000000 x16: 0000000000000000 [ 6.784498] x15: 0000000000000000 x14: 0000000000000000 [ 6.789793] x13: ffff000008d6b190 x12: 752ce9eb60de3f00 [ 6.795088] x11: ffff80178536f7f0 x10: ffff80178536f7f0 [ 6.800383] x9 : 00000000ffffffd0 x8 : 0000000000000000 [ 6.805678] x7 : ffff00000816fe48 x6 : ffff801794ba62b8 [ 6.810973] x5 : 0000000000000000 x4 : 0000000000000000 [ 6.816269] x3 : ffffffffffffffff x2 : ffff0000091ed988 [ 6.821564] x1 : 752ce9eb60de3f00 x0 : 752ce9eb60de3f00 [ 6.826859] Call trace: [ 6.829290] check_flags.part.38+0x9c/0x16c [ 6.833457] lock_acquire+0x12c/0x280 [ 6.837104] down_read_trylock+0x78/0x98 [ 6.841011] do_page_fault+0x150/0x480 [ 6.844742] do_translation_fault+0x74/0x80 [ 6.848909] do_mem_abort+0x60/0x108 [ 6.852467] el0_da+0x24/0x28 [ 6.855418] irq event stamp: 250 [ 6.858633] hardirqs last enabled at (249): [<ffff00000830e518>] mem_cgroup_commit_charge+0x9c/0x13c [ 6.867833] hardirqs last disabled at (250): [<ffff000008095f40>] el0_svc_handler+0xc4/0x16c [ 6.876252] softirqs last enabled at (242): [<ffff000008081c48>] __do_softirq+0x2f8/0x554 [ 6.884501] softirqs last disabled at (229): [<ffff0000080f1bec>] irq_exit+0x180/0x194 [ 6.892399] ---[ end trace b45768f94a7b7d9f ]--- [ 6.896998] possible reason: unannotated irqs-on. [ 6.901685] irq event stamp: 250 [ 6.904898] hardirqs last enabled at (249): [<ffff00000830e518>] mem_cgroup_commit_charge+0x9c/0x13c [ 6.914100] hardirqs last disabled at (250): [<ffff000008095f40>] el0_svc_handler+0xc4/0x16c [ 6.922519] softirqs last enabled at (242): [<ffff000008081c48>] __do_softirq+0x2f8/0x554 [ 6.930766] softirqs last disabled at (229): [<ffff0000080f1bec>] irq_exit+0x180/0x194 [ 7.023827] Initialise system trusted keyrings [ 7.027414] workingset: timestamp_bits=45 max_order=25 bucket_order=0 I thought the root cause might be at [2] which seems not in your branch yet. [1] http://git.cmpxchg.org/cgit.cgi/linux-mmotm.git [2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=efd112 --- Cheers, Jia On 8/24/2018 8:27 AM, akpm@xxxxxxxxxxxxxxxxxxxx Wrote: > The mm-of-the-moment snapshot 2018-08-23-17-26 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 (4.x > or 4.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 git tree which contains the memory management portion of this tree is > maintained at git://git.kernel.org/pub/scm/linux/kernel/git/mhocko/mm.git > by Michal Hocko. It contains the patches which are between the > "#NEXT_PATCHES_START mm" and "#NEXT_PATCHES_END" markers, from the series > file, http://www.ozlabs.org/~akpm/mmotm/series. > > > 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. > > http://git.cmpxchg.org/cgit.cgi/linux-mmotm.git/ > > To develop on top of mmotm git: > > $ git remote add mmotm git://git.kernel.org/pub/scm/linux/kernel/git/mhocko/mm.git > $ git remote update mmotm > $ git checkout -b topic mmotm/master > <make changes, commit> > $ git send-email mmotm/master.. [...] > > To rebase a branch with older patches to a new mmotm release: > > $ git remote update mmotm > $ git rebase --onto mmotm/master <topic base> topic > > > > > 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 available at > > http://git.cmpxchg.org/cgit.cgi/linux-mmots.git/ > > and use of this tree is similar to > http://git.cmpxchg.org/cgit.cgi/linux-mmotm.git/, described above. > > > This mmotm tree contains the following patches against 4.18: > (patches marked "*" will be included in linux-next) > > origin.patch > * hfsplus-fix-null-dereference-in-hfsplus_lookup.patch > * hfsplus-prevent-crash-on-exit-from-failed-search.patch > * hfs-prevent-crash-on-exit-from-failed-search.patch > * namei-allow-restricted-o_creat-of-fifos-and-regular-files.patch > * mm-fix-race-on-soft-offlining-free-huge-pages.patch > * mm-soft-offline-close-the-race-against-page-allocation.patch > * hwtracing-intel_th-change-return-type-to-vm_fault_t.patch > * fs-afs-adding-new-return-type-vm_fault_t.patch > * treewide-correct-differenciate-and-instanciate-typos.patch > * vmcore-hide-vmcoredd_mmap_dumps-for-nommu-builds.patch > * mm-util-make-strndup_user-description-a-kernel-doc-comment.patch > * mm-util-add-kernel-doc-for-kvfree.patch > * docs-core-api-kill-trailing-whitespace-in-kernel-apirst.patch > * docs-core-api-move-strmemdup-to-string-manipulation.patch > * docs-core-api-split-memory-management-api-to-a-separate-file.patch > * docs-mm-make-gfp-flags-descriptions-usable-as-kernel-doc.patch > * docs-core-api-mm-api-add-section-about-gfp-flags.patch > * gpu-drm-gma500-change-return-type-to-vm_fault_t.patch > * treewide-convert-iso_8859-1-text-comments-to-utf-8.patch > * s390-ebcdic-convert-comments-to-utf-8.patch > * lib-fonts-convert-comments-to-utf-8.patch > * mm-change-return-type-int-to-vm_fault_t-for-fault-handlers.patch > * mm-memcontrol-print-proper-oom-header-when-no-eligible-victim-left.patch > * mm-migration-fix-migration-of-huge-pmd-shared-pages.patch > * hugetlb-take-pmd-sharing-into-account-when-flushing-tlb-caches.patch > * mm-oom-fix-missing-tlb_finish_mmu-in-__oom_reap_task_mm.patch > * mm-respect-arch_dup_mmap-return-value.patch > * arm-arch-arm-include-asm-pageh-needs-personalityh.patch > * ocfs2-get-rid-of-ocfs2_is_o2cb_active-function.patch > * ocfs2-without-quota-support-try-to-avoid-calling-quota-recovery.patch > * ocfs2-dont-use-iocb-when-eiocbqueued-returns.patch > * ocfs2-fix-a-misuse-a-of-brelse-after-failing-ocfs2_check_dir_entry.patch > * ocfs2-dont-put-and-assigning-null-to-bh-allocated-outside.patch > * ocfs2-dlmglue-clean-up-timestamp-handling.patch > * block-restore-proc-partitions-to-not-display-non-partitionable-removable-devices.patch > mm.patch > * arm-arm64-introduce-config_have_memblock_pfn_valid.patch > * mm-page_alloc-remain-memblock_next_valid_pfn-on-arm-arm64.patch > * mm-page_alloc-reduce-unnecessary-binary-search-in-memblock_next_valid_pfn.patch > * mm-page_alloc-reduce-unnecessary-binary-search-in-memblock_next_valid_pfn-fix.patch > * mm-page_alloc-reduce-unnecessary-binary-search-in-memblock_next_valid_pfn-fix-fix.patch > * mm-memblock-introduce-memblock_search_pfn_regions.patch > * mm-memblock-introduce-memblock_search_pfn_regions-fix.patch > * mm-memblock-introduce-pfn_valid_region.patch > * mm-page_alloc-reduce-unnecessary-binary-search-in-early_pfn_valid.patch > * z3fold-fix-wrong-handling-of-headless-pages.patch > * mm-adjust-max-read-count-in-generic_file_buffered_read.patch > * mm-make-memmap_init-a-proper-function.patch > * mm-calculate-deferred-pages-after-skipping-mirrored-memory.patch > * mm-calculate-deferred-pages-after-skipping-mirrored-memory-v2.patch > * mm-calculate-deferred-pages-after-skipping-mirrored-memory-fix.patch > * mm-move-mirrored-memory-specific-code-outside-of-memmap_init_zone.patch > * mm-move-mirrored-memory-specific-code-outside-of-memmap_init_zone-v2.patch > * mm-swap-fix-race-between-swapoff-and-some-swap-operations.patch > * mm-swap-fix-race-between-swapoff-and-some-swap-operations-v6.patch > * mm-fix-race-between-swapoff-and-mincore.patch > * list_lru-prefetch-neighboring-list-entries-before-acquiring-lock.patch > * list_lru-prefetch-neighboring-list-entries-before-acquiring-lock-fix.patch > * mm-add-strictlimit-knob-v2.patch > * mm-dont-expose-page-to-fast-gup-before-its-ready.patch > * mm-page_owner-align-with-pageblock_nr_pages.patch > * mm-page_owner-align-with-pageblock_nr-pages.patch > * info-task-hung-in-generic_file_write_iter.patch > * bfs-add-sanity-check-at-bfs_fill_super.patch > linux-next.patch > linux-next-git-rejects.patch > * vfs-replace-current_kernel_time64-with-ktime-equivalent.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 > slab-leaks3-default-y.patch > workaround-for-a-pci-restoring-bug.patch > >
