Messages in this thread Patch in this message | | | Date | Thu, 12 Mar 2020 22:17:49 +0800 | From | Baoquan He <> | Subject | [PATCH v3] mm/sparse.c: Use kvmalloc_node/kvfree to alloc/free memmap for the classic sparse |
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This change makes populate_section_memmap()/depopulate_section_memmap much simpler.
Suggested-by: Michal Hocko <mhocko@kernel.org> Signed-off-by: Baoquan He <bhe@redhat.com> --- v2->v3: Remove __GFP_NOWARN and use array_size when calling kvmalloc_node() per Matthew's comments.
mm/sparse.c | 27 +++------------------------ 1 file changed, 3 insertions(+), 24 deletions(-)
diff --git a/mm/sparse.c b/mm/sparse.c index bf6c00a28045..bb99633575b5 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -734,35 +734,14 @@ static void free_map_bootmem(struct page *memmap) struct page * __meminit populate_section_memmap(unsigned long pfn, unsigned long nr_pages, int nid, struct vmem_altmap *altmap) { - struct page *page, *ret; - unsigned long memmap_size = sizeof(struct page) * PAGES_PER_SECTION; - - page = alloc_pages(GFP_KERNEL|__GFP_NOWARN, get_order(memmap_size)); - if (page) - goto got_map_page; - - ret = vmalloc(memmap_size); - if (ret) - goto got_map_ptr; - - return NULL; -got_map_page: - ret = (struct page *)pfn_to_kaddr(page_to_pfn(page)); -got_map_ptr: - - return ret; + return kvmalloc_node(array_size(sizeof(struct page), + PAGES_PER_SECTION), GFP_KERNEL, nid); } static void depopulate_section_memmap(unsigned long pfn, unsigned long nr_pages, struct vmem_altmap *altmap) { - struct page *memmap = pfn_to_page(pfn); - - if (is_vmalloc_addr(memmap)) - vfree(memmap); - else - free_pages((unsigned long)memmap, - get_order(sizeof(struct page) * PAGES_PER_SECTION)); + kvfree(pfn_to_page(pfn)); } static void free_map_bootmem(struct page *memmap) -- 2.17.2
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