The patch titled Subject: mm, thp: print useful information when mmap_sem is unlocked in zap_pmd_range has been removed from the -mm tree. Its filename was mm-thp-print-useful-information-when-mmap_sem-is-unlocked-in-zap_pmd_range.patch This patch was dropped because it was merged into mainline or a subsystem tree The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ From: David Rientjes <rientjes@xxxxxxxxxx> Subject: mm, thp: print useful information when mmap_sem is unlocked in zap_pmd_range Andrea asked for addr, end, vma->vm_start, and vma->vm_end to be emitted when !rwsem_is_locked(&tlb->mm->mmap_sem). Otherwise, debugging the underlying issue is more difficult. Suggested-by: Andrea Arcangeli <aarcange@xxxxxxxxxx> Signed-off-by: David Rientjes <rientjes@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/memory.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff -puN mm/memory.c~mm-thp-print-useful-information-when-mmap_sem-is-unlocked-in-zap_pmd_range mm/memory.c --- a/mm/memory.c~mm-thp-print-useful-information-when-mmap_sem-is-unlocked-in-zap_pmd_range +++ a/mm/memory.c @@ -1226,7 +1226,15 @@ static inline unsigned long zap_pmd_rang next = pmd_addr_end(addr, end); if (pmd_trans_huge(*pmd)) { if (next - addr != HPAGE_PMD_SIZE) { - VM_BUG_ON(!rwsem_is_locked(&tlb->mm->mmap_sem)); +#ifdef CONFIG_DEBUG_VM + if (!rwsem_is_locked(&tlb->mm->mmap_sem)) { + pr_err("%s: mmap_sem is unlocked! addr=0x%lx end=0x%lx vma->vm_start=0x%lx vma->vm_end=0x%lx\n", + __func__, addr, end, + vma->vm_start, + vma->vm_end); + BUG(); + } +#endif split_huge_page_pmd(vma->vm_mm, pmd); } else if (zap_huge_pmd(tlb, vma, pmd, addr)) goto next; _ Patches currently in -mm which might be from rientjes@xxxxxxxxxx are origin.patch linux-next.patch memory-hotplug-fix-invalid-memory-access-caused-by-stale-kswapd-pointer.patch memory-hotplug-fix-invalid-memory-access-caused-by-stale-kswapd-pointer-fix.patch slab-move-full-state-transition-to-an-initcall.patch mm-buddy-cleanup-on-should_fail_alloc_page.patch hugetlb-rename-max_hstate-to-hugetlb_max_hstate.patch hugetlb-dont-use-err_ptr-with-vm_fault-values.patch hugetlb-add-an-inline-helper-for-finding-hstate-index.patch hugetlb-use-mmu_gather-instead-of-a-temporary-linked-list-for-accumulating-pages.patch hugetlb-avoid-taking-i_mmap_mutex-in-unmap_single_vma-for-hugetlb.patch hugetlb-simplify-migrate_huge_page.patch hugetlb-add-a-list-for-tracking-in-use-hugetlb-pages.patch hugetlb-make-some-static-variables-global.patch mm-hugetlb-add-new-hugetlb-cgroup.patch hugetlb-cgroup-add-the-cgroup-pointer-to-page-lru.patch hugetlb-cgroup-add-charge-uncharge-routines-for-hugetlb-cgroup.patch hugetlb-cgroup-add-support-for-cgroup-removal.patch hugetlb-cgroup-add-hugetlb-cgroup-control-files.patch hugetlb-cgroup-migrate-hugetlb-cgroup-info-from-oldpage-to-new-page-during-migration.patch hugetlb-cgroup-add-hugetlb-controller-documentation.patch mm-oom-do-not-schedule-if-current-has-been-killed.patch mm-buddy-get-the-allownodes-for-dump-at-once.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html