The patch titled Subject: hugetlb: clarify hugetlb_instantiation_mutex usage has been removed from the -mm tree. Its filename was hugetlb-clarify-hugetlb_instantiation_mutex-usage.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: Michal Hocko <mhocko@xxxxxxx> Subject: hugetlb: clarify hugetlb_instantiation_mutex usage Let's make it clear that we cannot race with other fault handlers due to hugetlb (global) mutex. Also make it clear that we want to keep pte_same checks anayway to have a transition from the global mutex easier. Signed-off-by: Michal Hocko <mhocko@xxxxxxx> Cc: Hillf Danton <dhillf@xxxxxxxxx> Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx> Cc: Johannes Weiner <jweiner@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/hugetlb.c | 3 +++ 1 file changed, 3 insertions(+) diff -puN mm/hugetlb.c~hugetlb-clarify-hugetlb_instantiation_mutex-usage mm/hugetlb.c --- a/mm/hugetlb.c~hugetlb-clarify-hugetlb_instantiation_mutex-usage +++ a/mm/hugetlb.c @@ -2349,6 +2349,9 @@ static int unmap_ref_private(struct mm_s /* * Hugetlb_cow() should be called with page lock of the original hugepage held. + * Called with hugetlb_instantiation_mutex held and pte_page locked so we + * cannot race with other handlers or page migration. + * Keep the pte_same checks anyway to make transition from the mutex easier. */ static int hugetlb_cow(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long address, pte_t *ptep, pte_t pte, _ Patches currently in -mm which might be from mhocko@xxxxxxx are origin.patch mm-hugetlb-undo-change-to-page-mapcount-in-fault-handler.patch memcg-add-mem_cgroup_replace_page_cache-to-fix-lru-issue.patch mm-memcg-consolidate-hierarchy-iteration-primitives.patch mm-vmscan-distinguish-global-reclaim-from-global-lru-scanning.patch mm-vmscan-distinguish-between-memcg-triggering-reclaim-and-memcg-being-scanned.patch mm-memcg-per-priority-per-zone-hierarchy-scan-generations.patch mm-move-memcg-hierarchy-reclaim-to-generic-reclaim-code.patch mm-memcg-remove-optimization-of-keeping-the-root_mem_cgroup-lru-lists-empty.patch mm-vmscan-convert-global-reclaim-to-per-memcg-lru-lists.patch mm-collect-lru-list-heads-into-struct-lruvec.patch mm-make-per-memcg-lru-lists-exclusive.patch mm-memcg-remove-unused-node-section-info-from-pc-flags.patch mm-memcg-remove-unused-node-section-info-from-pc-flags-fix.patch memcg-make-mem_cgroup_split_huge_fixup-more-efficient.patch memcg-make-mem_cgroup_split_huge_fixup-more-efficient-fix.patch memcg-fix-pgpgin-pgpgout-documentation.patch mm-oom_kill-remove-memcg-argument-from-oom_kill_task.patch mm-unify-remaining-mem_cont-mem-etc-variable-names-to-memcg.patch mm-memcg-clean-up-fault-accounting.patch mm-memcg-lookup_page_cgroup-almost-never-returns-null.patch mm-memcg-lookup_page_cgroup-almost-never-returns-null-fix.patch mm-page_cgroup-check-page_cgroup-arrays-in-lookup_page_cgroup-only-when-necessary.patch mm-memcg-remove-unneeded-checks-from-newpage_charge.patch mm-memcg-remove-unneeded-checks-from-uncharge_page.patch page_cgroup-add-helper-function-to-get-swap_cgroup.patch page_cgroup-add-helper-function-to-get-swap_cgroup-cleanup.patch memcg-clean-up-soft_limit_tree-if-allocation-fails.patch oom-memcg-fix-exclusion-of-memcg-threads-after-they-have-detached-their-mm.patch memcg-simplify-page-cache-charging.patch memcg-simplify-corner-case-handling-of-lru.patch memcg-clear-pc-mem_cgorup-if-necessary.patch memcg-clear-pc-mem_cgorup-if-necessary-fix.patch memcg-clear-pc-mem_cgorup-if-necessary-fix-2.patch memcg-clear-pc-mem_cgorup-if-necessary-fix-2-fix.patch memcg-clear-pc-mem_cgorup-if-necessary-fix-3.patch memcg-clear-pc-mem_cgorup-if-necessary-fix-page-migration-to-reset_owner.patch memcg-simplify-lru-handling-by-new-rule.patch memcg-simplify-lru-handling-by-new-rule-fix.patch memcg-simplify-lru-handling-by-new-rule-memcg-return-eintr-at-bypassing-try_charge.patch memcg-simplify-lru-handling-by-new-rule-memcg-return-eintr-at-bypassing-try_charge-fix.patch memcg-simplify-lru-handling-by-new-rule-memcg-return-eintr-at-bypassing-try_charge-fix-null-mem_cgroup_try_charge.patch memcg-cleanup-for_each_node_state.patch page_alloc-break-early-in-check_for_regular_memory.patch page_cgroup-drop-multi-config_memory_hotplug.patch memcg-fix-split_huge_page_refcounts.patch memcg-fix-mem_cgroup_print_bad_page.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