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-rw-r--r--mm/vmscan.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 827bf674577..e5117b6897a 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -71,6 +71,9 @@ struct scan_control {
int may_writepage;
+ /* Can pages be swapped as part of reclaim? */
+ int may_swap;
+
/* This context's SWAP_CLUSTER_MAX. If freeing memory for
* suspend, we effectively ignore SWAP_CLUSTER_MAX.
* In this context, it doesn't matter that we scan the
@@ -458,6 +461,8 @@ static int shrink_list(struct list_head *page_list, struct scan_control *sc)
* Try to allocate it some swap space here.
*/
if (PageAnon(page) && !PageSwapCache(page)) {
+ if (!sc->may_swap)
+ goto keep_locked;
if (!add_to_swap(page, GFP_ATOMIC))
goto activate_locked;
}
@@ -1166,6 +1171,7 @@ int try_to_free_pages(struct zone **zones, gfp_t gfp_mask)
sc.gfp_mask = gfp_mask;
sc.may_writepage = 0;
+ sc.may_swap = 1;
inc_page_state(allocstall);
@@ -1268,6 +1274,7 @@ loop_again:
total_reclaimed = 0;
sc.gfp_mask = GFP_KERNEL;
sc.may_writepage = 0;
+ sc.may_swap = 1;
sc.nr_mapped = read_page_state(nr_mapped);
inc_page_state(pageoutrun);