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authorLee Schermerhorn <lee.schermerhorn@hp.com>2009-09-21 17:01:22 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-22 07:17:26 -0700
commite8c5c8249878fb6564125680a1d15e06adbd5639 (patch)
tree66a69c11ea0f27e45c747e6f7236da80d9788cc1 /include
parent55a4462af5722d2814858bc51ee8d58ca29544ab (diff)
hugetlb: balance freeing of huge pages across nodes
Free huges pages from nodes in round robin fashion in an attempt to keep [persistent a.k.a static] hugepages balanced across nodes New function free_pool_huge_page() is modeled on and performs roughly the inverse of alloc_fresh_huge_page(). Replaces dequeue_huge_page() which now has no callers, so this patch removes it. Helper function hstate_next_node_to_free() uses new hstate member next_to_free_nid to distribute "frees" across all nodes with huge pages. Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com> Acked-by: Mel Gorman <mel@csn.ul.ie> Cc: Nishanth Aravamudan <nacc@us.ibm.com> Cc: Adam Litke <agl@us.ibm.com> Cc: Andy Whitcroft <apw@canonical.com> Cc: Eric Whitney <eric.whitney@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/hugetlb.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 5cbc620bdfe..16cdb75a543 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -185,7 +185,8 @@ unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
#define HSTATE_NAME_LEN 32
/* Defines one hugetlb page size */
struct hstate {
- int hugetlb_next_nid;
+ int next_nid_to_alloc;
+ int next_nid_to_free;
unsigned int order;
unsigned long mask;
unsigned long max_huge_pages;