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[PATCH] hot-add-mem x86_64: use CONFIG_MEMORY_HOTPLUG_RESERVE 

The api for hot-add memory already has a construct for finding nodes based on
an address, memory_add_physaddr_to_nid.  This patch allows the fucntion to do
something besides return 0.  It uses the nodes_add infomation to lookup to
node info for a hot add event.

Signed-off-by: Keith Mannthey <kmannth@us.ibm.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Keith Mannthey 2006-09-30 23:27:09 -07:00 committed by Linus Torvalds
parent 53947027ad
commit 45e0b78b05
2 changed files with 43 additions and 34 deletions
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17
arch/x86_64/mm/init.c
View File

@ -474,12 +474,12 @@ int arch_add_memory(int nid, u64 start, u64 size)
unsigned long nr_pages = size >> PAGE_SHIFT;
int ret;
init_memory_mapping(start, (start + size -1));
ret = __add_pages(zone, start_pfn, nr_pages);
if (ret)
goto error;
init_memory_mapping(start, (start + size -1));
return ret;
error:
printk("%s: Problem encountered in __add_pages!\n", __func__);
@ -501,7 +501,16 @@ int memory_add_physaddr_to_nid(u64 start)
EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
#endif
#else /* CONFIG_MEMORY_HOTPLUG */
#ifndef CONFIG_ACPI_NUMA
int memory_add_physaddr_to_nid(u64 start)
{
return 0;
}
#endif
#endif /* CONFIG_MEMORY_HOTPLUG */
#ifdef CONFIG_MEMORY_HOTPLUG_RESERVE
/*
* Memory Hotadd without sparsemem. The mem_maps have been allocated in advance,
* just online the pages.
@ -527,7 +536,7 @@ int __add_pages(struct zone *z, unsigned long start_pfn, unsigned long nr_pages)
}
return err;
}
#endif /* CONFIG_MEMORY_HOTPLUG */
#endif
static struct kcore_list kcore_mem, kcore_vmalloc, kcore_kernel, kcore_modules,
kcore_vsyscall;

60
mm/memory_hotplug.c
View File

@ -26,6 +26,36 @@
#include <asm/tlbflush.h>
/* add this memory to iomem resource */
static struct resource *register_memory_resource(u64 start, u64 size)
{
struct resource *res;
res = kzalloc(sizeof(struct resource), GFP_KERNEL);
BUG_ON(!res);
res->name = "System RAM";
res->start = start;
res->end = start + size - 1;
res->flags = IORESOURCE_MEM;
if (request_resource(&iomem_resource, res) < 0) {
printk("System RAM resource %llx - %llx cannot be added\n",
(unsigned long long)res->start, (unsigned long long)res->end);
kfree(res);
res = NULL;
}
return res;
}
static void release_memory_resource(struct resource *res)
{
if (!res)
return;
release_resource(res);
kfree(res);
return;
}
#ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
static int __add_zone(struct zone *zone, unsigned long phys_start_pfn)
{
@ -223,36 +253,6 @@ static void rollback_node_hotadd(int nid, pg_data_t *pgdat)
return;
}
/* add this memory to iomem resource */
static struct resource *register_memory_resource(u64 start, u64 size)
{
struct resource *res;
res = kzalloc(sizeof(struct resource), GFP_KERNEL);
BUG_ON(!res);
res->name = "System RAM";
res->start = start;
res->end = start + size - 1;
res->flags = IORESOURCE_MEM;
if (request_resource(&iomem_resource, res) < 0) {
printk("System RAM resource %llx - %llx cannot be added\n",
(unsigned long long)res->start, (unsigned long long)res->end);
kfree(res);
res = NULL;
}
return res;
}
static void release_memory_resource(struct resource *res)
{
if (!res)
return;
release_resource(res);
kfree(res);
return;
}
int add_memory(int nid, u64 start, u64 size)
{