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authorMel Gorman <mel@skynet.ie>2006-10-28 13:38:59 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-28 14:30:55 -0400
commit0c6cb974636dd29681b03f8eb0ae227decab01fb (patch)
treedfcf831a0c067eec8e1afbd4c22be3e1e736155e /mm
parent057647fc47b3a5fbcfa997041db3f483d506603c (diff)
[PATCH] Calculation fix for memory holes beyong the end of physical memory
absent_pages_in_range() made the assumption that users of the arch-independent zone-sizing API would not care about holes beyound the end of physical memory. This was not the case and was "fixed" in a patch called "Account for holes that are outside the range of physical memory". However, when given a range that started before a hole in "real" memory and ended beyond the end of memory, it would get the result wrong. The bug is in mainline but a patch is below. It has been tested successfully on a number of machines and architectures. Additional credit to Keith Mannthey for discovering the problem, helping identify the correct fix and confirming it Worked For Him. Signed-off-by: Mel Gorman <mel@csn.ul.ie> Cc: keith mannthey <kmannth@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/page_alloc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index ecf853b5e30e..b55bb358b832 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2261,7 +2261,7 @@ unsigned long __init __absent_pages_in_range(int nid,
2261 2261
2262 /* Account for ranges past physical memory on this node */ 2262 /* Account for ranges past physical memory on this node */
2263 if (range_end_pfn > prev_end_pfn) 2263 if (range_end_pfn > prev_end_pfn)
2264 hole_pages = range_end_pfn - 2264 hole_pages += range_end_pfn -
2265 max(range_start_pfn, prev_end_pfn); 2265 max(range_start_pfn, prev_end_pfn);
2266 2266
2267 return hole_pages; 2267 return hole_pages;