diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/hugetlb_vmemmap.c | 39 |
1 files changed, 24 insertions, 15 deletions
diff --git a/mm/hugetlb_vmemmap.c b/mm/hugetlb_vmemmap.c index 9df350372046..d2999c303031 100644 --- a/mm/hugetlb_vmemmap.c +++ b/mm/hugetlb_vmemmap.c @@ -461,18 +461,19 @@ out: * @end: end address of the vmemmap virtual address range that we want to * remap. * @reuse: reuse address. + * @flags: modifications to vmemmap_remap_walk flags * * Return: %0 on success, negative error code otherwise. */ static int vmemmap_remap_alloc(unsigned long start, unsigned long end, - unsigned long reuse) + unsigned long reuse, unsigned long flags) { LIST_HEAD(vmemmap_pages); struct vmemmap_remap_walk walk = { .remap_pte = vmemmap_restore_pte, .reuse_addr = reuse, .vmemmap_pages = &vmemmap_pages, - .flags = 0, + .flags = flags, }; /* See the comment in the vmemmap_remap_free(). */ @@ -494,17 +495,7 @@ EXPORT_SYMBOL(hugetlb_optimize_vmemmap_key); static bool vmemmap_optimize_enabled = IS_ENABLED(CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON); core_param(hugetlb_free_vmemmap, vmemmap_optimize_enabled, bool, 0); -/** - * hugetlb_vmemmap_restore - restore previously optimized (by - * hugetlb_vmemmap_optimize()) vmemmap pages which - * will be reallocated and remapped. - * @h: struct hstate. - * @head: the head page whose vmemmap pages will be restored. - * - * Return: %0 if @head's vmemmap pages have been reallocated and remapped, - * negative error code otherwise. - */ -int hugetlb_vmemmap_restore(const struct hstate *h, struct page *head) +static int __hugetlb_vmemmap_restore(const struct hstate *h, struct page *head, unsigned long flags) { int ret; unsigned long vmemmap_start = (unsigned long)head, vmemmap_end; @@ -525,7 +516,7 @@ int hugetlb_vmemmap_restore(const struct hstate *h, struct page *head) * When a HugeTLB page is freed to the buddy allocator, previously * discarded vmemmap pages must be allocated and remapping. */ - ret = vmemmap_remap_alloc(vmemmap_start, vmemmap_end, vmemmap_reuse); + ret = vmemmap_remap_alloc(vmemmap_start, vmemmap_end, vmemmap_reuse, flags); if (!ret) { ClearHPageVmemmapOptimized(head); static_branch_dec(&hugetlb_optimize_vmemmap_key); @@ -535,6 +526,21 @@ int hugetlb_vmemmap_restore(const struct hstate *h, struct page *head) } /** + * hugetlb_vmemmap_restore - restore previously optimized (by + * hugetlb_vmemmap_optimize()) vmemmap pages which + * will be reallocated and remapped. + * @h: struct hstate. + * @head: the head page whose vmemmap pages will be restored. + * + * Return: %0 if @head's vmemmap pages have been reallocated and remapped, + * negative error code otherwise. + */ +int hugetlb_vmemmap_restore(const struct hstate *h, struct page *head) +{ + return __hugetlb_vmemmap_restore(h, head, 0); +} + +/** * hugetlb_vmemmap_restore_folios - restore vmemmap for every folio on the list. * @h: hstate. * @folio_list: list of folios. @@ -557,7 +563,8 @@ long hugetlb_vmemmap_restore_folios(const struct hstate *h, list_for_each_entry_safe(folio, t_folio, folio_list, lru) { if (folio_test_hugetlb_vmemmap_optimized(folio)) { - ret = hugetlb_vmemmap_restore(h, &folio->page); + ret = __hugetlb_vmemmap_restore(h, &folio->page, + VMEMMAP_REMAP_NO_TLB_FLUSH); if (ret) break; restored++; @@ -567,6 +574,8 @@ long hugetlb_vmemmap_restore_folios(const struct hstate *h, list_move(&folio->lru, non_hvo_folios); } + if (restored) + flush_tlb_all(); if (!ret) ret = restored; return ret; |