#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/vmalloc.h>
+#include "internal.h"
#include <asm/dma.h>
#include <asm/pgalloc.h>
#include <asm/pgtable.h>
+#include "internal.h"
/*
* Permanent SPARSEMEM data:
return (section->section_mem_map >> SECTION_NID_SHIFT);
}
-/* Record a memory area against a node. */
-void __init memory_present(int nid, unsigned long start, unsigned long end)
+/* Validate the physical addressing limitations of the model */
+void __meminit mminit_validate_memmodel_limits(unsigned long *start_pfn,
+ unsigned long *end_pfn)
{
- unsigned long max_arch_pfn = 1UL << (MAX_PHYSMEM_BITS-PAGE_SHIFT);
- unsigned long pfn;
+ unsigned long max_sparsemem_pfn = 1UL << (MAX_PHYSMEM_BITS-PAGE_SHIFT);
/*
* Sanity checks - do not allow an architecture to pass
* in larger pfns than the maximum scope of sparsemem:
*/
- if (start >= max_arch_pfn)
- return;
- if (end >= max_arch_pfn)
- end = max_arch_pfn;
+ if (*start_pfn > max_sparsemem_pfn) {
+ mminit_dprintk(MMINIT_WARNING, "pfnvalidation",
+ "Start of range %lu -> %lu exceeds SPARSEMEM max %lu\n",
+ *start_pfn, *end_pfn, max_sparsemem_pfn);
+ WARN_ON_ONCE(1);
+ *start_pfn = max_sparsemem_pfn;
+ *end_pfn = max_sparsemem_pfn;
+ }
+
+ if (*end_pfn > max_sparsemem_pfn) {
+ mminit_dprintk(MMINIT_WARNING, "pfnvalidation",
+ "End of range %lu -> %lu exceeds SPARSEMEM max %lu\n",
+ *start_pfn, *end_pfn, max_sparsemem_pfn);
+ WARN_ON_ONCE(1);
+ *end_pfn = max_sparsemem_pfn;
+ }
+}
+
+/* Record a memory area against a node. */
+void __init memory_present(int nid, unsigned long start, unsigned long end)
+{
+ unsigned long pfn;
start &= PAGE_SECTION_MASK;
+ mminit_validate_memmodel_limits(&start, &end);
for (pfn = start; pfn < end; pfn += PAGES_PER_SECTION) {
unsigned long section = pfn_to_section_nr(pfn);
struct mem_section *ms;
unsigned long pfn;
unsigned long nr_pages = 0;
+ mminit_validate_memmodel_limits(&start_pfn, &end_pfn);
for (pfn = start_pfn; pfn < end_pfn; pfn += PAGES_PER_SECTION) {
if (nid != early_pfn_to_nid(pfn))
continue;
static unsigned long *__init sparse_early_usemap_alloc(unsigned long pnum)
{
- unsigned long *usemap, section_nr;
+ unsigned long *usemap;
struct mem_section *ms = __nr_to_section(pnum);
int nid = sparse_early_nid(ms);
- struct pglist_data *pgdat = NODE_DATA(nid);
- /*
- * Usemap's page can't be freed until freeing other sections
- * which use it. And, Pgdat has same feature.
- * If section A has pgdat and section B has usemap for other
- * sections (includes section A), both sections can't be removed,
- * because there is the dependency each other.
- * To solve above issue, this collects all usemap on the same section
- * which has pgdat.
- */
- section_nr = pfn_to_section_nr(__pa(pgdat) >> PAGE_SHIFT);
- usemap = alloc_bootmem_section(usemap_size(), section_nr);
+ usemap = alloc_bootmem_node(NODE_DATA(nid), usemap_size());
if (usemap)
return usemap;
/* Stupid: suppress gcc warning for SPARSEMEM && !NUMA */
nid = 0;
- printk(KERN_WARNING "%s: allocation failed\n", __FUNCTION__);
+ printk(KERN_WARNING "%s: allocation failed\n", __func__);
return NULL;
}
return map;
printk(KERN_ERR "%s: sparsemem memory map backing failed "
- "some memory will not be available.\n", __FUNCTION__);
+ "some memory will not be available.\n", __func__);
ms->section_mem_map = 0;
return NULL;
}
{
return; /* XXX: Not implemented yet */
}
+static void free_map_bootmem(struct page *page, unsigned long nr_pages)
+{
+}
#else
static struct page *__kmalloc_section_memmap(unsigned long nr_pages)
{
free_pages((unsigned long)memmap,
get_order(sizeof(struct page) * nr_pages));
}
+
+static void free_map_bootmem(struct page *page, unsigned long nr_pages)
+{
+ unsigned long maps_section_nr, removing_section_nr, i;
+ int magic;
+
+ for (i = 0; i < nr_pages; i++, page++) {
+ magic = atomic_read(&page->_mapcount);
+
+ BUG_ON(magic == NODE_INFO);
+
+ maps_section_nr = pfn_to_section_nr(page_to_pfn(page));
+ removing_section_nr = page->private;
+
+ /*
+ * When this function is called, the removing section is
+ * logical offlined state. This means all pages are isolated
+ * from page allocator. If removing section's memmap is placed
+ * on the same section, it must not be freed.
+ * If it is freed, page allocator may allocate it which will
+ * be removed physically soon.
+ */
+ if (maps_section_nr != removing_section_nr)
+ put_page_bootmem(page);
+ }
+}
#endif /* CONFIG_SPARSEMEM_VMEMMAP */
static void free_section_usemap(struct page *memmap, unsigned long *usemap)
{
+ struct page *usemap_page;
+ unsigned long nr_pages;
+
if (!usemap)
return;
+ usemap_page = virt_to_page(usemap);
/*
* Check to see if allocation came from hot-plug-add
*/
- if (PageSlab(virt_to_page(usemap))) {
+ if (PageSlab(usemap_page)) {
kfree(usemap);
if (memmap)
__kfree_section_memmap(memmap, PAGES_PER_SECTION);
}
/*
- * TODO: Allocations came from bootmem - how do I free up ?
+ * The usemap came from bootmem. This is packed with other usemaps
+ * on the section which has pgdat at boot time. Just keep it as is now.
*/
- printk(KERN_WARNING "Not freeing up allocations from bootmem "
- "- leaking memory\n");
+
+ if (memmap) {
+ struct page *memmap_page;
+ memmap_page = virt_to_page(memmap);
+
+ nr_pages = PAGE_ALIGN(PAGES_PER_SECTION * sizeof(struct page))
+ >> PAGE_SHIFT;
+
+ free_map_bootmem(memmap_page, nr_pages);
+ }
}
/*
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff