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x86, NUMA: Initialize and use remap allocator from setup_node_bootmem() 

setup_node_bootmem() is taken from 64bit and doesn't use remap
allocator.  It's about to be shared with 32bit so add support for it.
If NODE_DATA is remapped, it's noted in the debug message and node
locality check is skipped as the __pa() of the remapped address
doesn't reflect the actual physical address.

On 64bit, remap allocator becomes noop and doesn't affect the
behavior.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
This commit is contained in:
Tejun Heo 2011-05-02 14:18:54 +02:00
parent 99cca492ea
commit 7888e96b26
3 changed files with 34 additions and 15 deletions
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41
arch/x86/mm/numa.c
View File

@ -197,7 +197,9 @@ static void __init setup_node_bootmem(int nid, u64 start, u64 end)
const u64 nd_low = PFN_PHYS(MAX_DMA_PFN);
const u64 nd_high = PFN_PHYS(max_pfn_mapped);
const size_t nd_size = roundup(sizeof(pg_data_t), PAGE_SIZE);
bool remapped = false;
u64 nd_pa;
void *nd;
int tnid;
/*
@ -207,34 +209,45 @@ static void __init setup_node_bootmem(int nid, u64 start, u64 end)
if (end && (end - start) < NODE_MIN_SIZE)
return;
/* initialize remap allocator before aligning to ZONE_ALIGN */
init_alloc_remap(nid, start, end);
start = roundup(start, ZONE_ALIGN);
printk(KERN_INFO "Initmem setup node %d %016Lx-%016Lx\n",
nid, start, end);
/*
* Try to allocate node data on local node and then fall back to
* all nodes. Never allocate in DMA zone.
* Allocate node data. Try remap allocator first, node-local
* memory and then any node. Never allocate in DMA zone.
*/
nd_pa = memblock_x86_find_in_range_node(nid, nd_low, nd_high,
nd = alloc_remap(nid, nd_size);
if (nd) {
nd_pa = __pa(nd);
remapped = true;
} else {
nd_pa = memblock_x86_find_in_range_node(nid, nd_low, nd_high,
nd_size, SMP_CACHE_BYTES);
if (nd_pa == MEMBLOCK_ERROR)
nd_pa = memblock_find_in_range(nd_low, nd_high,
nd_size, SMP_CACHE_BYTES);
if (nd_pa == MEMBLOCK_ERROR) {
pr_err("Cannot find %zu bytes in node %d\n", nd_size, nid);
return;
if (nd_pa == MEMBLOCK_ERROR)
nd_pa = memblock_find_in_range(nd_low, nd_high,
nd_size, SMP_CACHE_BYTES);
if (nd_pa == MEMBLOCK_ERROR) {
pr_err("Cannot find %zu bytes in node %d\n",
nd_size, nid);
return;
}
memblock_x86_reserve_range(nd_pa, nd_pa + nd_size, "NODE_DATA");
nd = __va(nd_pa);
}
memblock_x86_reserve_range(nd_pa, nd_pa + nd_size, "NODE_DATA");
/* report and initialize */
printk(KERN_INFO " NODE_DATA [%016Lx - %016Lx]\n",
nd_pa, nd_pa + nd_size - 1);
printk(KERN_INFO " NODE_DATA [%016Lx - %016Lx]%s\n",
nd_pa, nd_pa + nd_size - 1, remapped ? " (remapped)" : "");
tnid = early_pfn_to_nid(nd_pa >> PAGE_SHIFT);
if (tnid != nid)
if (!remapped && tnid != nid)
printk(KERN_INFO " NODE_DATA(%d) on node %d\n", nid, tnid);
node_data[nid] = __va(nd_pa);
node_data[nid] = nd;
memset(NODE_DATA(nid), 0, sizeof(pg_data_t));
NODE_DATA(nid)->node_id = nid;
NODE_DATA(nid)->node_start_pfn = start >> PAGE_SHIFT;

2
arch/x86/mm/numa_32.c
View File

@ -265,7 +265,7 @@ void resume_map_numa_kva(pgd_t *pgd_base)
* opportunistically and the callers will fall back to other memory
* allocation mechanisms on failure.
*/
static __init void init_alloc_remap(int nid, u64 start, u64 end)
void __init init_alloc_remap(int nid, u64 start, u64 end)
{
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long end_pfn = end >> PAGE_SHIFT;

6
arch/x86/mm/numa_internal.h
View File

@ -21,6 +21,12 @@ void __init numa_reset_distance(void);
void __init x86_numa_init(void);
#ifdef CONFIG_X86_64
static inline void init_alloc_remap(int nid, u64 start, u64 end) { }
#else
void __init init_alloc_remap(int nid, u64 start, u64 end);
#endif
#ifdef CONFIG_NUMA_EMU
void __init numa_emulation(struct numa_meminfo *numa_meminfo,
int numa_dist_cnt);