Dan Williams
99490f16f8
mm: ZONE_DEVICE depends on SPARSEMEM_VMEMMAP
...
The primary use case for devm_memremap_pages() is to allocate an memmap
array from persistent memory. That capabilty requires vmem_altmap which
requires SPARSEMEM_VMEMMAP.
Also, without SPARSEMEM_VMEMMAP the addition of ZONE_DEVICE expands
ZONES_WIDTH and triggers the:
"Unfortunate NUMA and NUMA Balancing config, growing page-frame for
last_cpupid."
...warning in mm/memory.c. SPARSEMEM_VMEMMAP=n && ZONE_DEVICE=y is not
a configuration we should worry about supporting.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Reported-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-17 15:09:34 -07:00
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