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x86_64: disable srat when numa emulation succeeds

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When NUMA emulation succeeds, acpi_numa needs to be set to -1 so that
srat_disabled() will always return true.  We won't be calling
acpi_scan_nodes() or registering the true nodes we've found.

[hugh@veritas.com: Fix x86_64 CONFIG_NUMA_EMU build: acpi_numa needs CONFIG_ACPI_NUMA]
Signed-off-by: David Rientjes <rientjes@google.com>
Cc: Len Brown <lenb@kernel.org>
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Rientjes 2007-07-21 17:11:30 +02:00 committed by Linus Torvalds
parent a7e96629ef
commit 1c05f093c0
1 changed files with 5 additions and 1 deletions
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6
arch/x86_64/mm/numa.c
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@ -473,9 +473,13 @@ static int __init numa_emulation(unsigned long start_pfn, unsigned long end_pfn)
/*
* We need to vacate all active ranges that may have been registered by
* SRAT.
* SRAT and set acpi_numa to -1 so that srat_disabled() always returns
* true. NUMA emulation has succeeded so we will not scan ACPI nodes.
*/
remove_all_active_ranges();
#ifdef CONFIG_ACPI_NUMA
acpi_numa = -1;
#endif
for_each_node_mask(i, node_possible_map) {
e820_register_active_regions(i, nodes[i].start >> PAGE_SHIFT,
nodes[i].end >> PAGE_SHIFT);