Allow nodes to exist that only contain ZONE_MOVABLE
With the introduction of kernelcore=, a configurable zone is created on request. In some cases, this value will be small enough that some nodes contain only ZONE_MOVABLE. On some NUMA configurations when this occurs, arch-independent zone-sizing will get the size of the memory holes within the node incorrect. The value of present_pages goes negative and the boot fails. This patch fixes the bug in the calculation of the size of the hole. The test case is to boot test a NUMA machine with a low value of kernelcore= before and after the patch is applied. While this bug exists in early kernel it cannot be triggered in practice. This patch has been boot-tested on a variety machines with and without kernelcore= set. Signed-off-by: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
parent
ee2077d97b
commit
b5445f956e
|
@ -2775,11 +2775,11 @@ unsigned long __meminit __absent_pages_in_range(int nid,
|
|||
if (i == -1)
|
||||
return 0;
|
||||
|
||||
prev_end_pfn = min(early_node_map[i].start_pfn, range_end_pfn);
|
||||
|
||||
/* Account for ranges before physical memory on this node */
|
||||
if (early_node_map[i].start_pfn > range_start_pfn)
|
||||
hole_pages = early_node_map[i].start_pfn - range_start_pfn;
|
||||
|
||||
prev_end_pfn = early_node_map[i].start_pfn;
|
||||
hole_pages = prev_end_pfn - range_start_pfn;
|
||||
|
||||
/* Find all holes for the zone within the node */
|
||||
for (; i != -1; i = next_active_region_index_in_nid(i, nid)) {
|
||||
|
|
Loading…
Reference in a new issue