mm/sparse: delete old sparse_init and enable new one
Rename new_sparse_init() to sparse_init() which enables it. Delete old sparse_init() and all the code that became obsolete with. [pasha.tatashin@oracle.com: remove unused sparse_mem_maps_populate_node()] Link: http://lkml.kernel.org/r/20180716174447.14529-6-pasha.tatashin@oracle.com Link: http://lkml.kernel.org/r/20180712203730.8703-6-pasha.tatashin@oracle.com Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com> Tested-by: Michael Ellerman <mpe@ellerman.id.au> [powerpc] Tested-by: Oscar Salvador <osalvador@suse.de> Reviewed-by: Oscar Salvador <osalvador@suse.de> Cc: Pasha Tatashin <Pavel.Tatashin@microsoft.com> Cc: Abdul Haleem <abdhalee@linux.vnet.ibm.com> Cc: Baoquan He <bhe@redhat.com> Cc: Daniel Jordan <daniel.m.jordan@oracle.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: David Rientjes <rientjes@google.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jan Kara <jack@suse.cz> Cc: Jérôme Glisse <jglisse@redhat.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Souptick Joarder <jrdr.linux@gmail.com> Cc: Steven Sistare <steven.sistare@oracle.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Wei Yang <richard.weiyang@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Pavel Tatashin
Linus Torvalds
Родитель
85c77f7913
Коммит
2a3cb8baef
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@ -2665,12 +2665,6 @@ extern int randomize_va_space;
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const char * arch_vma_name(struct vm_area_struct *vma);
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void print_vma_addr(char *prefix, unsigned long rip);
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void sparse_mem_maps_populate_node(struct page **map_map,
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unsigned long pnum_begin,
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unsigned long pnum_end,
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unsigned long map_count,
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int nodeid);
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void *sparse_buffer_alloc(unsigned long size);
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struct page *sparse_mem_map_populate(unsigned long pnum, int nid,
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struct vmem_altmap *altmap);
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@ -118,10 +118,6 @@ config SPARSEMEM_EXTREME
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config SPARSEMEM_VMEMMAP_ENABLE
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bool
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config SPARSEMEM_ALLOC_MEM_MAP_TOGETHER
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def_bool y
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depends on SPARSEMEM && X86_64
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config SPARSEMEM_VMEMMAP
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bool "Sparse Memory virtual memmap"
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depends on SPARSEMEM && SPARSEMEM_VMEMMAP_ENABLE
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@ -261,24 +261,3 @@ struct page * __meminit sparse_mem_map_populate(unsigned long pnum, int nid,
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return map;
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}
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void __init sparse_mem_maps_populate_node(struct page **map_map,
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unsigned long pnum_begin,
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unsigned long pnum_end,
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unsigned long map_count, int nodeid)
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{
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unsigned long pnum;
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int nr_consumed_maps = 0;
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for (pnum = pnum_begin; pnum < pnum_end; pnum++) {
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if (!present_section_nr(pnum))
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continue;
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map_map[nr_consumed_maps] =
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sparse_mem_map_populate(pnum, nodeid, NULL);
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if (map_map[nr_consumed_maps++])
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continue;
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pr_err("%s: sparsemem memory map backing failed some memory will not be available\n",
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__func__);
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}
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}
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237
mm/sparse.c
237
mm/sparse.c
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@ -205,12 +205,6 @@ static inline unsigned long first_present_section_nr(void)
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return next_present_section_nr(-1);
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}
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/*
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* Record how many memory sections are marked as present
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* during system bootup.
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*/
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static int __initdata nr_present_sections;
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/* Record a memory area against a node. */
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void __init memory_present(int nid, unsigned long start, unsigned long end)
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{
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@ -240,7 +234,6 @@ void __init memory_present(int nid, unsigned long start, unsigned long end)
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ms->section_mem_map = sparse_encode_early_nid(nid) |
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SECTION_IS_ONLINE;
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section_mark_present(ms);
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nr_present_sections++;
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}
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}
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}
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@ -377,37 +370,8 @@ static void __init check_usemap_section_nr(int nid, unsigned long *usemap)
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}
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#endif /* CONFIG_MEMORY_HOTREMOVE */
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static void __init sparse_early_usemaps_alloc_node(void *data,
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unsigned long pnum_begin,
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unsigned long pnum_end,
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unsigned long usemap_count, int nodeid)
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{
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void *usemap;
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unsigned long pnum;
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unsigned long **usemap_map = (unsigned long **)data;
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int size = usemap_size();
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int nr_consumed_maps = 0;
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usemap = sparse_early_usemaps_alloc_pgdat_section(NODE_DATA(nodeid),
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size * usemap_count);
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if (!usemap) {
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pr_warn("%s: allocation failed\n", __func__);
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return;
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}
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for (pnum = pnum_begin; pnum < pnum_end; pnum++) {
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if (!present_section_nr(pnum))
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continue;
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usemap_map[nr_consumed_maps] = usemap;
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usemap += size;
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check_usemap_section_nr(nodeid, usemap_map[nr_consumed_maps]);
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nr_consumed_maps++;
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}
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}
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#ifdef CONFIG_SPARSEMEM_VMEMMAP
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static unsigned long __init section_map_size(void)
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{
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return ALIGN(sizeof(struct page) * PAGES_PER_SECTION, PMD_SIZE);
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}
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@ -432,25 +396,6 @@ struct page __init *sparse_mem_map_populate(unsigned long pnum, int nid,
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BOOTMEM_ALLOC_ACCESSIBLE, nid);
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return map;
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}
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void __init sparse_mem_maps_populate_node(struct page **map_map,
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unsigned long pnum_begin,
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unsigned long pnum_end,
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unsigned long map_count, int nodeid)
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{
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unsigned long pnum;
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int nr_consumed_maps = 0;
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for (pnum = pnum_begin; pnum < pnum_end; pnum++) {
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if (!present_section_nr(pnum))
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continue;
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map_map[nr_consumed_maps] =
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sparse_mem_map_populate(pnum, nodeid, NULL);
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if (map_map[nr_consumed_maps++])
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continue;
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pr_err("%s: sparsemem memory map backing failed some memory will not be available\n",
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__func__);
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}
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}
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#endif /* !CONFIG_SPARSEMEM_VMEMMAP */
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static void *sparsemap_buf __meminitdata;
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@ -489,190 +434,10 @@ void * __meminit sparse_buffer_alloc(unsigned long size)
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return ptr;
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}
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#ifdef CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER
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static void __init sparse_early_mem_maps_alloc_node(void *data,
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unsigned long pnum_begin,
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unsigned long pnum_end,
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unsigned long map_count, int nodeid)
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{
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struct page **map_map = (struct page **)data;
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sparse_buffer_init(section_map_size() * map_count, nodeid);
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sparse_mem_maps_populate_node(map_map, pnum_begin, pnum_end,
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map_count, nodeid);
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sparse_buffer_fini();
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}
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#else
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static struct page __init *sparse_early_mem_map_alloc(unsigned long pnum)
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{
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struct page *map;
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struct mem_section *ms = __nr_to_section(pnum);
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int nid = sparse_early_nid(ms);
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map = sparse_mem_map_populate(pnum, nid, NULL);
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if (map)
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return map;
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pr_err("%s: sparsemem memory map backing failed some memory will not be available\n",
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__func__);
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return NULL;
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}
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#endif
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void __weak __meminit vmemmap_populate_print_last(void)
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{
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}
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/**
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* alloc_usemap_and_memmap - memory alloction for pageblock flags and vmemmap
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* @map: usemap_map for pageblock flags or mmap_map for vmemmap
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* @unit_size: size of map unit
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*/
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static void __init alloc_usemap_and_memmap(void (*alloc_func)
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(void *, unsigned long, unsigned long,
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unsigned long, int), void *data,
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int data_unit_size)
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{
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unsigned long pnum;
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unsigned long map_count;
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int nodeid_begin = 0;
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unsigned long pnum_begin = 0;
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for_each_present_section_nr(0, pnum) {
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struct mem_section *ms;
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ms = __nr_to_section(pnum);
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nodeid_begin = sparse_early_nid(ms);
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pnum_begin = pnum;
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break;
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}
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map_count = 1;
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for_each_present_section_nr(pnum_begin + 1, pnum) {
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struct mem_section *ms;
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int nodeid;
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ms = __nr_to_section(pnum);
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nodeid = sparse_early_nid(ms);
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if (nodeid == nodeid_begin) {
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map_count++;
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continue;
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}
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/* ok, we need to take cake of from pnum_begin to pnum - 1*/
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alloc_func(data, pnum_begin, pnum,
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map_count, nodeid_begin);
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/* new start, update count etc*/
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nodeid_begin = nodeid;
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pnum_begin = pnum;
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data += map_count * data_unit_size;
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map_count = 1;
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}
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/* ok, last chunk */
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alloc_func(data, pnum_begin, __highest_present_section_nr+1,
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map_count, nodeid_begin);
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}
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/*
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* Allocate the accumulated non-linear sections, allocate a mem_map
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* for each and record the physical to section mapping.
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*/
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void __init sparse_init(void)
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{
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unsigned long pnum;
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struct page *map;
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unsigned long *usemap;
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unsigned long **usemap_map;
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int size;
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int nr_consumed_maps = 0;
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#ifdef CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER
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int size2;
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struct page **map_map;
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#endif
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/* see include/linux/mmzone.h 'struct mem_section' definition */
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BUILD_BUG_ON(!is_power_of_2(sizeof(struct mem_section)));
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/* Setup pageblock_order for HUGETLB_PAGE_SIZE_VARIABLE */
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set_pageblock_order();
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/*
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* map is using big page (aka 2M in x86 64 bit)
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* usemap is less one page (aka 24 bytes)
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* so alloc 2M (with 2M align) and 24 bytes in turn will
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* make next 2M slip to one more 2M later.
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* then in big system, the memory will have a lot of holes...
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* here try to allocate 2M pages continuously.
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*
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* powerpc need to call sparse_init_one_section right after each
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* sparse_early_mem_map_alloc, so allocate usemap_map at first.
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*/
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size = sizeof(unsigned long *) * nr_present_sections;
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usemap_map = memblock_virt_alloc(size, 0);
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if (!usemap_map)
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panic("can not allocate usemap_map\n");
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alloc_usemap_and_memmap(sparse_early_usemaps_alloc_node,
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(void *)usemap_map,
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sizeof(usemap_map[0]));
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#ifdef CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER
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size2 = sizeof(struct page *) * nr_present_sections;
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map_map = memblock_virt_alloc(size2, 0);
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if (!map_map)
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panic("can not allocate map_map\n");
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alloc_usemap_and_memmap(sparse_early_mem_maps_alloc_node,
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(void *)map_map,
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sizeof(map_map[0]));
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#endif
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/*
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* The number of present sections stored in nr_present_sections
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* are kept the same since mem sections are marked as present in
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* memory_present(). In this for loop, we need check which sections
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* failed to allocate memmap or usemap, then clear its
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* ->section_mem_map accordingly. During this process, we need
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* increase 'nr_consumed_maps' whether its allocation of memmap
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* or usemap failed or not, so that after we handle the i-th
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* memory section, can get memmap and usemap of (i+1)-th section
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* correctly.
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*/
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for_each_present_section_nr(0, pnum) {
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struct mem_section *ms;
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if (nr_consumed_maps >= nr_present_sections) {
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pr_err("nr_consumed_maps goes beyond nr_present_sections\n");
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break;
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}
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ms = __nr_to_section(pnum);
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usemap = usemap_map[nr_consumed_maps];
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if (!usemap) {
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ms->section_mem_map = 0;
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nr_consumed_maps++;
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continue;
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}
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#ifdef CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER
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map = map_map[nr_consumed_maps];
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#else
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map = sparse_early_mem_map_alloc(pnum);
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#endif
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if (!map) {
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ms->section_mem_map = 0;
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nr_consumed_maps++;
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continue;
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}
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sparse_init_one_section(__nr_to_section(pnum), pnum, map,
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usemap);
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nr_consumed_maps++;
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}
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vmemmap_populate_print_last();
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#ifdef CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER
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memblock_free_early(__pa(map_map), size2);
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#endif
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memblock_free_early(__pa(usemap_map), size);
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}
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/*
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* Initialize sparse on a specific node. The node spans [pnum_begin, pnum_end)
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* And number of present sections in this node is map_count.
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@ -726,7 +491,7 @@ failed:
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* Allocate the accumulated non-linear sections, allocate a mem_map
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* for each and record the physical to section mapping.
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*/
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void __init new_sparse_init(void)
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void __init sparse_init(void)
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{
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unsigned long pnum_begin = first_present_section_nr();
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int nid_begin = sparse_early_nid(__nr_to_section(pnum_begin));
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