Commit 797390d8 authored by Tejun Heo's avatar Tejun Heo
Browse files

x86-32, NUMA: use sparse_memory_present_with_active_regions() 



Instead of calling memory_present() for each region from NUMA init,
call sparse_memory_present_with_active_regions() from paging_init()
similarly to x86-64.

For flat and numaq, this results in exactly the same memory_present()
calls.  For srat, if there are multiple memory chunks for a node,
after this change, memory_present() will be called separately for each
chunk instead of being called once to encompass the whole range, which
doesn't cause any harm and actually is the better behavior.

Signed-off-by: default avatarTejun 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>
parent 84914ed0

arch/x86/kernel/apic/numaq_32.c

+0 −2
Original line number Diff line number Diff line
@@ -91,8 +91,6 @@ static inline void numaq_register_node(int node, struct sys_cfg_data *scd) 


	memblock_x86_register_active_regions(node, node_start_pfn[node],

						node_end_pfn[node]);



	memory_present(node, node_start_pfn[node], node_end_pfn[node]);

}



/*

arch/x86/mm/init_32.c

+1 −0
Original line number Diff line number Diff line
@@ -716,6 +716,7 @@ void __init paging_init(void) 
	 * NOTE: at this point the bootmem allocator is fully available.

	 */

	olpc_dt_build_devicetree();

	sparse_memory_present_with_active_regions(MAX_NUMNODES);

	sparse_init();

	zone_sizes_init();

}

arch/x86/mm/numa_32.c

+0 −1
Original line number Diff line number Diff line
@@ -119,7 +119,6 @@ int __init get_memcfg_numa_flat(void) 
	node_start_pfn[0] = 0;

	node_end_pfn[0] = max_pfn;

	memblock_x86_register_active_regions(0, 0, max_pfn);

	memory_present(0, 0, max_pfn);



        /* Indicate there is one node available. */

	nodes_clear(node_online_map);

arch/x86/mm/srat_32.c

+1 −7
Original line number Diff line number Diff line
@@ -209,7 +209,7 @@ static __init int node_read_chunk(int nid, struct node_memory_chunk_s *memory_ch 


int __init get_memcfg_from_srat(void)

{

	int i, j, nid;

	int i, j;



	if (srat_disabled())

		goto out_fail;
@@ -273,12 +273,6 @@ int __init get_memcfg_from_srat(void) 
	/* for out of order entries in SRAT */

	sort_node_map();



	for_each_online_node(nid) {

		unsigned long start = node_start_pfn[nid];

		unsigned long end = min(node_end_pfn[nid], max_pfn);



		memory_present(nid, start, end);

	}

	return 1;

out_fail:

	printk(KERN_DEBUG "failed to get NUMA memory information from SRAT"

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