diff options
author | Lee Schermerhorn <Lee.Schermerhorn@hp.com> | 2009-09-21 17:01:25 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-22 07:17:26 -0700 |
commit | 57dd28fb0513d2f772bb215f27925165e7b9ce5f (patch) | |
tree | 6ebdf5b1a336e75b156d7818273af1d78ea78ac6 /mm | |
parent | 41a25e7e67b8be33d7598ff7968b9a8b405b6567 (diff) |
hugetlb: restore interleaving of bootmem huge pages
I noticed that alloc_bootmem_huge_page() will only advance to the next
node on failure to allocate a huge page, potentially filling nodes with
huge-pages. I asked about this on linux-mm and linux-numa, cc'ing the
usual huge page suspects.
Mel Gorman responded:
I strongly suspect that the same node being used until allocation
failure instead of round-robin is an oversight and not deliberate
at all. It appears to be a side-effect of a fix made way back in
commit 63b4613c3f0d4b724ba259dc6c201bb68b884e1a ["hugetlb: fix
hugepage allocation with memoryless nodes"]. Prior to that patch
it looked like allocations would always round-robin even when
allocation was successful.
This patch--factored out of my "hugetlb mempolicy" series--moves the
advance of the hstate next node from which to allocate up before the test
for success of the attempted allocation.
Note that alloc_bootmem_huge_page() is only used for order > MAX_ORDER
huge pages.
I'll post a separate patch for mainline/stable, as the above mentioned
"balance freeing" series renamed the next node to alloc function.
Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com>
Reviewed-by: Mel Gorman <mel@csn.ul.ie>
Reviewed-by: Andy Whitcroft <apw@canonical.com>
Reviewed-by: Andi Kleen <andi@firstfloor.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r-- | mm/hugetlb.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index f10cc274a7d9..c001f846f17d 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1031,6 +1031,7 @@ int __weak alloc_bootmem_huge_page(struct hstate *h) NODE_DATA(h->next_nid_to_alloc), huge_page_size(h), huge_page_size(h), 0); + hstate_next_node_to_alloc(h); if (addr) { /* * Use the beginning of the huge page to store the @@ -1040,7 +1041,6 @@ int __weak alloc_bootmem_huge_page(struct hstate *h) m = addr; goto found; } - hstate_next_node_to_alloc(h); nr_nodes--; } return 0; |