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authorAndrea Arcangeli <aarcange@redhat.com>2011-02-01 15:52:32 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2011-02-02 16:03:18 -0800
commit57fc4a5ee322cde96c33f101d3c2d3b79011c05c (patch)
treedc0fbf22dc90c93690de7cf0d115e5499222ff04 /mm
parent552b372ba9db85751e7db2998f07cca2e51f5865 (diff)
downloadlinux-linaro-stable-57fc4a5ee322cde96c33f101d3c2d3b79011c05c.tar.gz
mm: when migrate_pages returns 0, all pages must have been released
In some cases migrate_pages could return zero while still leaving a few pages in the pagelist (and some caller wouldn't notice it has to call putback_lru_pages after commit cf608ac19c9 ("mm: compaction: fix COMPACTPAGEFAILED counting")). Add one missing putback_lru_pages not added by commit cf608ac19c95 ("mm: compaction: fix COMPACTPAGEFAILED counting"). Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Signed-off-by: Minchan Kim <minchan.kim@gmail.com> Reviewed-by: Minchan Kim <minchan.kim@gmail.com> Cc: Christoph Lameter <cl@linux.com> Acked-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>
Diffstat (limited to 'mm')
-rw-r--r--mm/memory-failure.c1
-rw-r--r--mm/migrate.c3
2 files changed, 2 insertions, 2 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 548fbd70f026..75398b0bfede 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1419,6 +1419,7 @@ int soft_offline_page(struct page *page, int flags)
ret = migrate_pages(&pagelist, new_page, MPOL_MF_MOVE_ALL,
0, true);
if (ret) {
+ putback_lru_pages(&pagelist);
pr_info("soft offline: %#lx: migration failed %d, type %lx\n",
pfn, ret, page->flags);
if (ret > 0)
diff --git a/mm/migrate.c b/mm/migrate.c
index 9f29a3b7aac2..155a2e9a8059 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -772,6 +772,7 @@ uncharge:
unlock:
unlock_page(page);
+move_newpage:
if (rc != -EAGAIN) {
/*
* A page that has been migrated has all references
@@ -785,8 +786,6 @@ unlock:
putback_lru_page(page);
}
-move_newpage:
-
/*
* Move the new page to the LRU. If migration was not successful
* then this will free the page.