The patch titled Subject: mm: bootmem: remove redundant offset check when finally freeing bootmem has been added to the -mm tree. Its filename is mm-bootmem-remove-redundant-offset-check-when-finally-freeing-bootmem.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Johannes Weiner <hannes@xxxxxxxxxxx> Subject: mm: bootmem: remove redundant offset check when finally freeing bootmem When bootmem releases an unaligned BITS_PER_LONG pages chunk of memory to the page allocator, it checks the bitmap if there are still unreserved pages in the chunk (set bits), but also if the offset in the chunk indicates BITS_PER_LONG loop iterations already. But since the consulted bitmap is only a one-word-excerpt of the full per-node bitmap, there can not be more than BITS_PER_LONG bits set in it. The additional offset check is unnecessary. Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx> Acked-by: Tejun Heo <tj@xxxxxxxxxx> Acked-by: David S. Miller <davem@xxxxxxxxxxxxx> Cc: Yinghai Lu <yinghai@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/bootmem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff -puN mm/bootmem.c~mm-bootmem-remove-redundant-offset-check-when-finally-freeing-bootmem mm/bootmem.c --- a/mm/bootmem.c~mm-bootmem-remove-redundant-offset-check-when-finally-freeing-bootmem +++ a/mm/bootmem.c @@ -204,7 +204,7 @@ static unsigned long __init free_all_boo unsigned long off = 0; vec >>= start & (BITS_PER_LONG - 1); - while (vec && off < BITS_PER_LONG) { + while (vec) { if (vec & 1) { page = pfn_to_page(start + off); __free_pages_bootmem(page, 0); _ Subject: Subject: mm: bootmem: remove redundant offset check when finally freeing bootmem Patches currently in -mm which might be from hannes@xxxxxxxxxxx are linux-next.patch mm-remove-swap-token-code.patch hugetlb-rename-max_hstate-to-hugetlb_max_hstate.patch hugetlbfs-dont-use-err_ptr-with-vm_fault-values.patch hugetlbfs-add-an-inline-helper-for-finding-hstate-index.patch hugetlb-use-mmu_gather-instead-of-a-temporary-linked-list-for-accumulating-pages.patch hugetlb-use-mmu_gather-instead-of-a-temporary-linked-list-for-accumulating-pages-fix.patch hugetlb-use-mmu_gather-instead-of-a-temporary-linked-list-for-accumulating-pages-fix-fix.patch hugetlb-avoid-taking-i_mmap_mutex-in-unmap_single_vma-for-hugetlb.patch hugetlb-simplify-migrate_huge_page.patch memcg-add-hugetlb-extension.patch memcg-add-hugetlb-extension-fix.patch memcg-add-hugetlb-extension-fix-fix.patch hugetlb-add-charge-uncharge-calls-for-hugetlb-alloc-free.patch memcg-track-resource-index-in-cftype-private.patch hugetlbfs-add-memcg-control-files-for-hugetlbfs.patch hugetlbfs-add-memcg-control-files-for-hugetlbfs-use-scnprintf-instead-of-sprintf.patch hugetlbfs-add-memcg-control-files-for-hugetlbfs-use-scnprintf-instead-of-sprintf-fix.patch hugetlbfs-add-a-list-for-tracking-in-use-hugetlb-pages.patch memcg-move-hugetlb-resource-count-to-parent-cgroup-on-memcg-removal.patch memcg-move-hugetlb-resource-count-to-parent-cgroup-on-memcg-removal-fix.patch memcg-move-hugetlb-resource-count-to-parent-cgroup-on-memcg-removal-fix-fix.patch hugetlb-migrate-memcg-info-from-oldpage-to-new-page-during-migration.patch memcg-add-memory-controller-documentation-for-hugetlb-management.patch kernel-cgroup-push-rcu-read-locking-from-css_is_ancestor-to-callsite.patch mm-memcg-count-pte-references-from-every-member-of-the-reclaimed-hierarchy.patch mm-memcg-count-pte-references-from-every-member-of-the-reclaimed-hierarchy-fix.patch mm-thp-drop-page_table_lock-to-uncharge-memcg-pages.patch documentation-memcg-future-proof-hierarchical-statistics-documentation.patch mm-bootmem-fix-checking-the-bitmap-when-finally-freeing-bootmem.patch mm-bootmem-remove-redundant-offset-check-when-finally-freeing-bootmem.patch mm-bootmem-rename-alloc_bootmem_core-to-alloc_bootmem_bdata.patch mm-bootmem-split-out-goal-to-node-mapping-from-goal-dropping.patch mm-bootmem-allocate-in-order-nodegoal-goal-node-anywhere.patch mm-bootmem-unify-allocation-policy-of-non-panicking-node-allocations.patch mm-nobootmem-panic-on-node-specific-allocation-failure.patch mm-nobootmem-unify-allocation-policy-of-non-panicking-node-allocations.patch mm-bootmem-pass-pgdat-instead-of-pgdat-bdata-down-the-stack.patch mm-remove-sparsemem-allocation-details-from-the-bootmem-allocator.patch memcg-fix-change-behavior-of-shared-anon-at-moving-task.patch memcg-swap-mem_cgroup_move_swap_account-never-needs-fixup.patch memcg-swap-use-mem_cgroup_uncharge_swap.patch mm-memcg-scanning_global_lru-means-mem_cgroup_disabled.patch mm-memcg-move-reclaim_stat-into-lruvec.patch mm-push-lru-index-into-shrink_active_list.patch mm-push-lru-index-into-shrink_active_list-fix.patch mm-mark-mm-inline-functions-as-__always_inline.patch mm-remove-lru-type-checks-from-__isolate_lru_page.patch mm-memcg-kill-mem_cgroup_lru_del.patch memcg-revise-the-position-of-threshold-index-while-unregistering-event.patch mm-memcg-use-vm_swappiness-from-target-memory-cgroup.patch memcg-add-mlock-statistic-in-memorystat.patch memcg-add-mlock-statistic-in-memorystat-fix.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