diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-07-22 17:04:18 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-07-22 17:04:18 -0700 |
| commit | 9e39264ed4f687251632c0a6f4a70c2e51719662 (patch) | |
| tree | 27651ca028328ac5e7b5a030312ad113b6cb8b2b /arch/x86/mm/numa.c | |
| parent | dc43d9fa73d82083656fb9c02f4823bcdcfb9f91 (diff) | |
| parent | 1e01979c8f502ac13e3cdece4f38712c5944e6e8 (diff) | |
Merge branch 'x86-numa-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-numa-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86, numa: Implement pfn -> nid mapping granularity check
x86, mm: s/PAGES_PER_ELEMENT/PAGES_PER_SECTION/
Diffstat (limited to 'arch/x86/mm/numa.c')
| -rw-r--r-- | arch/x86/mm/numa.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c index f5510d889a2..fbeaaf41661 100644 --- a/arch/x86/mm/numa.c +++ b/arch/x86/mm/numa.c @@ -496,6 +496,7 @@ static bool __init numa_meminfo_cover_memory(const struct numa_meminfo *mi) static int __init numa_register_memblks(struct numa_meminfo *mi) { + unsigned long uninitialized_var(pfn_align); int i, nid; /* Account for nodes with cpus and no memory */ @@ -511,6 +512,20 @@ static int __init numa_register_memblks(struct numa_meminfo *mi) /* for out of order entries */ sort_node_map(); + + /* + * If sections array is gonna be used for pfn -> nid mapping, check + * whether its granularity is fine enough. + */ +#ifdef NODE_NOT_IN_PAGE_FLAGS + pfn_align = node_map_pfn_alignment(); + if (pfn_align && pfn_align < PAGES_PER_SECTION) { + printk(KERN_WARNING "Node alignment %LuMB < min %LuMB, rejecting NUMA config\n", + PFN_PHYS(pfn_align) >> 20, + PFN_PHYS(PAGES_PER_SECTION) >> 20); + return -EINVAL; + } +#endif if (!numa_meminfo_cover_memory(mi)) return -EINVAL; |