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[PATCH] memory hotplug: move section_mem_map alloc to sparse.c 

This basically keeps up from having to extern __kmalloc_section_memmap().

The vaddr_in_vmalloc_area() helper could go in a vmalloc header, but that
header gets hard to work with, because it needs some arch-specific macros.
Just stick it in here for now, instead of creating another header.

Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Lion Vollnhals <webmaster@schiggl.de>
Signed-off-by: Jiri Slaby <xslaby@fi.muni.cz>
Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Dave Hansen 2005-10-29 18:16:55 -07:00 committed by Linus Torvalds
parent 3947be1969
commit 0b0acbec1b
4 changed files with 75 additions and 57 deletions
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5
drivers/acpi/acpi_memhotplug.c
View File

@ -200,8 +200,7 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device)
* Note: Assume that this function returns zero on success
*/
result = add_memory(mem_device->start_addr,
(mem_device->end_addr - mem_device->start_addr) + 1,
mem_device->read_write_attribute);
(mem_device->end_addr - mem_device->start_addr) + 1);
if (result) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "\nadd_memory failed\n"));
mem_device->state = MEMORY_INVALID_STATE;
@ -259,7 +258,7 @@ static int acpi_memory_disable_device(struct acpi_memory_device *mem_device)
* Ask the VM to offline this memory range.
* Note: Assume that this function returns zero on success
*/
result = remove_memory(start, len, attr);
result = remove_memory(start, len);
if (result) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Hot-Remove failed.\n"));
return_VALUE(result);

5
drivers/base/memory.c
View File

@ -340,15 +340,12 @@ static int memory_probe_init(void)
static int add_memory_block(unsigned long node_id, struct mem_section *section,
unsigned long state, int phys_device)
{
size_t size = sizeof(struct memory_block);
struct memory_block *mem = kmalloc(size, GFP_KERNEL);
struct memory_block *mem = kzalloc(sizeof(*mem), GFP_KERNEL);
int ret = 0;
if (!mem)
return -ENOMEM;
memset(mem, 0, size);
mem->phys_index = __section_nr(section);
mem->state = state;
init_MUTEX(&mem->state_sem);

48
mm/memory_hotplug.c
View File

@ -24,28 +24,6 @@
#include <asm/tlbflush.h>
static struct page *__kmalloc_section_memmap(unsigned long nr_pages)
{
struct page *page, *ret;
unsigned long memmap_size = sizeof(struct page) * nr_pages;
page = alloc_pages(GFP_KERNEL, 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:
memset(ret, 0, memmap_size);
return ret;
}
extern void zonetable_add(struct zone *zone, int nid, int zid, unsigned long pfn,
unsigned long size);
static void __add_zone(struct zone *zone, unsigned long phys_start_pfn)
@ -60,35 +38,15 @@ static void __add_zone(struct zone *zone, unsigned long phys_start_pfn)
zonetable_add(zone, nid, zone_type, phys_start_pfn, nr_pages);
}
extern int sparse_add_one_section(struct zone *, unsigned long,
struct page *mem_map);
extern int sparse_add_one_section(struct zone *zone, unsigned long start_pfn,
int nr_pages);
static int __add_section(struct zone *zone, unsigned long phys_start_pfn)
{
struct pglist_data *pgdat = zone->zone_pgdat;
int nr_pages = PAGES_PER_SECTION;
struct page *memmap;
int ret;
/*
* This can potentially allocate memory, and does its own
* internal locking.
*/
sparse_index_init(pfn_to_section_nr(phys_start_pfn), pgdat->node_id);
pgdat_resize_lock(pgdat, &flags);
memmap = __kmalloc_section_memmap(nr_pages);
ret = sparse_add_one_section(zone, phys_start_pfn, memmap);
pgdat_resize_unlock(pgdat, &flags);
if (ret <= 0) {
/* the mem_map didn't get used */
if (memmap >= (struct page *)VMALLOC_START &&
memmap < (struct page *)VMALLOC_END)
vfree(memmap);
else
free_pages((unsigned long)memmap,
get_order(sizeof(struct page) * nr_pages));
}
ret = sparse_add_one_section(zone, phys_start_pfn, nr_pages);
if (ret < 0)
return ret;

74
mm/sparse.c
View File

@ -5,8 +5,10 @@
#include <linux/mm.h>
#include <linux/mmzone.h>
#include <linux/bootmem.h>
#include <linux/highmem.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/vmalloc.h>
#include <asm/dma.h>
/*
@ -187,6 +189,45 @@ static struct page *sparse_early_mem_map_alloc(unsigned long pnum)
return NULL;
}
static struct page *__kmalloc_section_memmap(unsigned long nr_pages)
{
struct page *page, *ret;
unsigned long memmap_size = sizeof(struct page) * nr_pages;
page = alloc_pages(GFP_KERNEL, 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:
memset(ret, 0, memmap_size);
return ret;
}
static int vaddr_in_vmalloc_area(void *addr)
{
if (addr >= (void *)VMALLOC_START &&
addr < (void *)VMALLOC_END)
return 1;
return 0;
}
static void __kfree_section_memmap(struct page *memmap, unsigned long nr_pages)
{
if (vaddr_in_vmalloc_area(memmap))
vfree(memmap);
else
free_pages((unsigned long)memmap,
get_order(sizeof(struct page) * nr_pages));
}
/*
* Allocate the accumulated non-linear sections, allocate a mem_map
* for each and record the physical to section mapping.
@ -212,14 +253,37 @@ void sparse_init(void)
* set. If this is <=0, then that means that the passed-in
* map was not consumed and must be freed.
*/
int sparse_add_one_section(unsigned long start_pfn, int nr_pages, struct page *map)
int sparse_add_one_section(struct zone *zone, unsigned long start_pfn,
int nr_pages)
{
struct mem_section *ms = __pfn_to_section(start_pfn);
unsigned long section_nr = pfn_to_section_nr(start_pfn);
struct pglist_data *pgdat = zone->zone_pgdat;
struct mem_section *ms;
struct page *memmap;
unsigned long flags;
int ret;
if (ms->section_mem_map & SECTION_MARKED_PRESENT)
return -EEXIST;
/*
* no locking for this, because it does its own
* plus, it does a kmalloc
*/
sparse_index_init(section_nr, pgdat->node_id);
memmap = __kmalloc_section_memmap(nr_pages);
pgdat_resize_lock(pgdat, &flags);
ms = __pfn_to_section(start_pfn);
if (ms->section_mem_map & SECTION_MARKED_PRESENT) {
ret = -EEXIST;
goto out;
}
ms->section_mem_map |= SECTION_MARKED_PRESENT;
return sparse_init_one_section(ms, pfn_to_section_nr(start_pfn), map);
ret = sparse_init_one_section(ms, section_nr, memmap);
if (ret <= 0)
__kfree_section_memmap(memmap, nr_pages);
out:
pgdat_resize_unlock(pgdat, &flags);
return ret;
}