Subject: [folded-merged] mm-prepare-to-remove-proc-sys-vm-hugepages_treat_as_movable-v2.patch removed from -mm tree To: n-horiguchi@xxxxxxxxxxxxx,ak@xxxxxxxxxxxxxxx,aneesh.kumar@xxxxxxxxxxxxxxxxxx,dhillf@xxxxxxxxx,hughd@xxxxxxxxxx,kosaki.motohiro@xxxxxxxxxxxxxx,liwanp@xxxxxxxxxxxxxxxxxx,mgorman@xxxxxxx,mhocko@xxxxxxx,riel@xxxxxxxxxx,mm-commits@xxxxxxxxxxxxxxx From: akpm@xxxxxxxxxxxxxxxxxxxx Date: Wed, 11 Sep 2013 13:59:05 -0700 The patch titled Subject: mm-prepare-to-remove-proc-sys-vm-hugepages_treat_as_movable-v2 has been removed from the -mm tree. Its filename was mm-prepare-to-remove-proc-sys-vm-hugepages_treat_as_movable-v2.patch This patch was dropped because it was folded into mm-prepare-to-remove-proc-sys-vm-hugepages_treat_as_movable.patch ------------------------------------------------------ From: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx> Subject: mm-prepare-to-remove-proc-sys-vm-hugepages_treat_as_movable-v2 ChangeLog v5: - choose GFP flags in accordance with mobility of hugepage - keep hugepages_treat_as_movable Signed-off-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx> Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx> Cc: Wanpeng Li <liwanp@xxxxxxxxxxxxxxxxxx> Cc: Hillf Danton <dhillf@xxxxxxxxx> Cc: Mel Gorman <mgorman@xxxxxxx> Cc: Hugh Dickins <hughd@xxxxxxxxxx> Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx> Cc: Michal Hocko <mhocko@xxxxxxx> Cc: Rik van Riel <riel@xxxxxxxxxx> Cc: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- Documentation/sysctl/vm.txt | 21 +++++++++++++++++++-- kernel/sysctl.c | 2 +- mm/hugetlb.c | 10 +--------- 3 files changed, 21 insertions(+), 12 deletions(-) diff -puN Documentation/sysctl/vm.txt~mm-prepare-to-remove-proc-sys-vm-hugepages_treat_as_movable-v2 Documentation/sysctl/vm.txt --- a/Documentation/sysctl/vm.txt~mm-prepare-to-remove-proc-sys-vm-hugepages_treat_as_movable-v2 +++ a/Documentation/sysctl/vm.txt @@ -200,8 +200,25 @@ fragmentation index is <= extfrag_thresh hugepages_treat_as_movable -This parameter is obsolete and planned to be removed. The value has no effect -on kernel's behavior. +This parameter controls whether we can allocate hugepages from ZONE_MOVABLE +or not. If set to non-zero, hugepages can be allocated from ZONE_MOVABLE. +ZONE_MOVABLE is created when kernel boot parameter kernelcore= is specified, +so this parameter has no effect if used without kernelcore=. + +Hugepage migration is now available in some situations which depend on the +architecture and/or the hugepage size. If a hugepage supports migration, +allocation from ZONE_MOVABLE is always enabled for the hugepage regardless +of the value of this parameter. +IOW, this parameter affects only non-migratable hugepages. + +Assuming that hugepages are not migratable in your system, one usecase of +this parameter is that users can make hugepage pool more extensible by +enabling the allocation from ZONE_MOVABLE. This is because on ZONE_MOVABLE +page reclaim/migration/compaction work more and you can get contiguous +memory more likely. Note that using ZONE_MOVABLE for non-migratable +hugepages can do harm to other features like memory hotremove (because +memory hotremove expects that memory blocks on ZONE_MOVABLE are always +removable,) so it's a trade-off responsible for the users. ============================================================== diff -puN kernel/sysctl.c~mm-prepare-to-remove-proc-sys-vm-hugepages_treat_as_movable-v2 kernel/sysctl.c --- a/kernel/sysctl.c~mm-prepare-to-remove-proc-sys-vm-hugepages_treat_as_movable-v2 +++ a/kernel/sysctl.c @@ -1225,7 +1225,7 @@ static struct ctl_table vm_table[] = { .data = &hugepages_treat_as_movable, .maxlen = sizeof(int), .mode = 0644, - .proc_handler = hugetlb_treat_movable_handler, + .proc_handler = proc_dointvec, }, { .procname = "nr_overcommit_hugepages", diff -puN mm/hugetlb.c~mm-prepare-to-remove-proc-sys-vm-hugepages_treat_as_movable-v2 mm/hugetlb.c --- a/mm/hugetlb.c~mm-prepare-to-remove-proc-sys-vm-hugepages_treat_as_movable-v2 +++ a/mm/hugetlb.c @@ -541,7 +541,7 @@ static struct page *dequeue_huge_page_no /* Movability of hugepages depends on migration support. */ static inline int htlb_alloc_mask(struct hstate *h) { - if (hugepage_migration_support(h)) + if (hugepages_treat_as_movable || hugepage_migration_support(h)) return GFP_HIGHUSER_MOVABLE; else return GFP_HIGHUSER; @@ -2125,14 +2125,6 @@ int hugetlb_mempolicy_sysctl_handler(str } #endif /* CONFIG_NUMA */ -int hugetlb_treat_movable_handler(struct ctl_table *table, int write, - void __user *buffer, - size_t *length, loff_t *ppos) -{ - WARN_ON_ONCE("This knob is obsolete and has no effect. It is scheduled for removal.\n"); - return 0; -} - int hugetlb_overcommit_handler(struct ctl_table *table, int write, void __user *buffer, size_t *length, loff_t *ppos) _ Patches currently in -mm which might be from n-horiguchi@xxxxxxxxxxxxx are mm-hugetlb-move-up-the-code-which-check-availability-of-free-huge-page.patch mm-hugetlb-trivial-commenting-fix.patch mm-hugetlb-clean-up-alloc_huge_page.patch mm-hugetlb-fix-and-clean-up-node-iteration-code-to-alloc-or-free.patch mm-hugetlb-remove-redundant-list_empty-check-in-gather_surplus_pages.patch mm-hugetlb-do-not-use-a-page-in-page-cache-for-cow-optimization.patch mm-hugetlb-add-vm_noreserve-check-in-vma_has_reserves.patch mm-hugetlb-remove-decrement_hugepage_resv_vma.patch mm-hugetlb-decrement-reserve-count-if-vm_noreserve-alloc-page-cache.patch mm-hugetlb-protect-reserved-pages-when-soft-offlining-a-hugepage.patch mm-hugetlb-change-variable-name-reservations-to-resv.patch mm-hugetlb-fix-subpool-accounting-handling.patch mm-hugetlb-remove-useless-check-about-mapping-type.patch mm-hugetlb-grab-a-page_table_lock-after-page_cache_release.patch mm-hugetlb-return-a-reserved-page-to-a-reserved-pool-if-failed.patch mm-migrate-make-core-migration-code-aware-of-hugepage.patch mm-soft-offline-use-migrate_pages-instead-of-migrate_huge_page.patch migrate-add-hugepage-migration-code-to-migrate_pages.patch mm-migrate-add-hugepage-migration-code-to-move_pages.patch mm-mbind-add-hugepage-migration-code-to-mbind.patch mm-migrate-remove-vm_hugetlb-from-vma-flag-check-in-vma_migratable.patch mm-memory-hotplug-enable-memory-hotplug-to-handle-hugepage.patch mm-migrate-check-movability-of-hugepage-in-unmap_and_move_huge_page.patch mm-prepare-to-remove-proc-sys-vm-hugepages_treat_as_movable.patch mm-prepare-to-remove-proc-sys-vm-hugepages_treat_as_movable-v2-fix.patch mm-mempolicy-rename-check_range-to-queue_pages_range.patch mbind-add-bug_onvma-in-new_vma_page.patch hwpoison-always-unset-migrate_isolate-before-returning-from-soft_offline_page.patch mm-hwpoison-fix-loss-of-pg_dirty-for-errors-on-mlocked-pages.patch mm-hwpoison-dont-need-to-hold-compound-lock-for-hugetlbfs-page.patch mm-hwpoison-fix-race-against-poison-thp.patch mm-hwpoison-replace-atomic_long_sub-with-atomic_long_dec.patch mm-hwpoison-dont-set-migration-type-twice-to-avoid-holding-heavily-contend-zone-lock.patch mm-hwpoison-drop-forward-reference-declarations-__soft_offline_page.patch mm-hwpoison-add-to-madvise_hwpoison.patch mm-hwpoisonc-fix-held-reference-count-after-unpoisoning-empty-zero-page.patch mm-hwpoison-injectc-change-permission-of-corrupt-pfn-unpoison-pfn-to-0200.patch mm-memory-failurec-fix-bug-triggered-by-unpoisoning-empty-zero-page.patch mm-hwpoison-fix-return-value-of-madvise_hwpoison.patch mm-madvisec-madvise_hwpoison-remove-local-ret.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