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ia64: use mem_data to detect nodes' minimal and maximal PFNs

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When EFI memory map is traversed to determine the extents of each node, the
minimal and maximal PFNs are stored in the bootmem_data structures. The
same information ls later stored in the mem_data array of 'struct
early_node_data'.

Switch to using mem_data from the very beginning.

Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Mike Rapoport 2018-07-23 08:56:57 +03:00 committed by Tony Luck
parent 0617c50a08
commit fb63fbee42
1 changed files with 14 additions and 46 deletions
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60
arch/ia64/mm/discontig.c
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@ -57,33 +57,31 @@ pg_data_t *pgdat_list[MAX_NUMNODES];
(((node)*PERCPU_PAGE_SIZE) & (MAX_NODE_ALIGN_OFFSET - 1)))
/**
* build_node_maps - callback to setup bootmem structs for each node
* build_node_maps - callback to setup mem_data structs for each node
* @start: physical start of range
* @len: length of range
* @node: node where this range resides
*
* We allocate a struct bootmem_data for each piece of memory that we wish to
* Detect extents of each piece of memory that we wish to
* treat as a virtually contiguous block (i.e. each node). Each such block
* must start on an %IA64_GRANULE_SIZE boundary, so we round the address down
* if necessary. Any non-existent pages will simply be part of the virtual
* memmap. We also update min_low_pfn and max_low_pfn here as we receive
* memory ranges from the caller.
* memmap.
*/
static int __init build_node_maps(unsigned long start, unsigned long len,
int node)
{
unsigned long spfn, epfn, end = start + len;
struct bootmem_data *bdp = &bootmem_node_data[node];
epfn = GRANULEROUNDUP(end) >> PAGE_SHIFT;
spfn = GRANULEROUNDDOWN(start) >> PAGE_SHIFT;
if (!bdp->node_low_pfn) {
bdp->node_min_pfn = spfn;
bdp->node_low_pfn = epfn;
if (!mem_data[node].min_pfn) {
mem_data[node].min_pfn = spfn;
mem_data[node].max_pfn = epfn;
} else {
bdp->node_min_pfn = min(spfn, bdp->node_min_pfn);
bdp->node_low_pfn = max(epfn, bdp->node_low_pfn);
mem_data[node].min_pfn = min(spfn, mem_data[node].min_pfn);
mem_data[node].max_pfn = max(epfn, mem_data[node].max_pfn);
}
return 0;
@ -323,19 +321,18 @@ static int __init find_pernode_space(unsigned long start, unsigned long len,
{
unsigned long spfn, epfn;
unsigned long pernodesize = 0, pernode, pages, mapsize;
struct bootmem_data *bdp = &bootmem_node_data[node];
spfn = start >> PAGE_SHIFT;
epfn = (start + len) >> PAGE_SHIFT;
pages = bdp->node_low_pfn - bdp->node_min_pfn;
pages = mem_data[node].max_pfn - mem_data[node].min_pfn;
mapsize = bootmem_bootmap_pages(pages) << PAGE_SHIFT;
/*
* Make sure this memory falls within this node's usable memory
* since we may have thrown some away in build_maps().
*/
if (spfn < bdp->node_min_pfn || epfn > bdp->node_low_pfn)
if (spfn < mem_data[node].min_pfn || epfn > mem_data[node].max_pfn)
return 0;
/* Don't setup this node's local space twice... */
@ -397,7 +394,7 @@ static void __init reserve_pernode_space(void)
bdp = pdp->bdata;
/* First the bootmem_map itself */
pages = bdp->node_low_pfn - bdp->node_min_pfn;
pages = mem_data[node].max_pfn - mem_data[node].min_pfn;
size = bootmem_bootmap_pages(pages) << PAGE_SHIFT;
base = __pa(bdp->node_bootmem_map);
reserve_bootmem_node(pdp, base, size, BOOTMEM_DEFAULT);
@ -541,10 +538,8 @@ void __init find_memory(void)
efi_memmap_walk(find_max_min_low_pfn, NULL);
for_each_online_node(node)
if (bootmem_node_data[node].node_low_pfn) {
if (mem_data[node].min_pfn)
node_clear(node, memory_less_mask);
mem_data[node].min_pfn = ~0UL;
}
efi_memmap_walk(filter_memory, register_active_ranges);
@ -568,8 +563,8 @@ void __init find_memory(void)
init_bootmem_node(pgdat_list[node],
map>>PAGE_SHIFT,
bdp->node_min_pfn,
bdp->node_low_pfn);
mem_data[node].min_pfn,
mem_data[node].max_pfn);
}
efi_memmap_walk(filter_rsvd_memory, free_node_bootmem);
@ -651,31 +646,6 @@ void call_pernode_memory(unsigned long start, unsigned long len, void *arg)
}
}
/**
* count_node_pages - callback to build per-node memory info structures
* @start: physical start of range
* @len: length of range
* @node: node where this range resides
*
* Each node has it's own number of physical pages, DMAable pages, start, and
* end page frame number. This routine will be called by call_pernode_memory()
* for each piece of usable memory and will setup these values for each node.
* Very similar to build_maps().
*/
static __init int count_node_pages(unsigned long start, unsigned long len, int node)
{
unsigned long end = start + len;
start = GRANULEROUNDDOWN(start);
end = GRANULEROUNDUP(end);
mem_data[node].max_pfn = max(mem_data[node].max_pfn,
end >> PAGE_SHIFT);
mem_data[node].min_pfn = min(mem_data[node].min_pfn,
start >> PAGE_SHIFT);
return 0;
}
/**
* paging_init - setup page tables
*
@ -692,8 +662,6 @@ void __init paging_init(void)
max_dma = virt_to_phys((void *) MAX_DMA_ADDRESS) >> PAGE_SHIFT;
efi_memmap_walk(filter_rsvd_memory, count_node_pages);
sparse_memory_present_with_active_regions(MAX_NUMNODES);
sparse_init();