Commit d2dbe08ddceb4ba2b274abb84326d7e69d454e5c
Committed by
Linus Torvalds
1 parent
5dab600e6a
Exists in
master
and in
39 other branches
mm/page_alloc: fix the range check for backward merging
The current check for 'backward merging' within add_active_range() does not seem correct. start_pfn must be compared against early_node_map[i].start_pfn (and NOT against .end_pfn) to find out whether the new region is backward-mergeable with the existing range. Signed-off-by: Kazuhisa Ichikawa <ki@epsilou.com> Acked-by: David Rientjes <rientjes@google.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Showing 1 changed file with 1 additions and 1 deletions Side-by-side Diff
mm/page_alloc.c
... | ... | @@ -3998,7 +3998,7 @@ |
3998 | 3998 | } |
3999 | 3999 | |
4000 | 4000 | /* Merge backward if suitable */ |
4001 | - if (start_pfn < early_node_map[i].end_pfn && | |
4001 | + if (start_pfn < early_node_map[i].start_pfn && | |
4002 | 4002 | end_pfn >= early_node_map[i].start_pfn) { |
4003 | 4003 | early_node_map[i].start_pfn = start_pfn; |
4004 | 4004 | return; |