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-rw-r--r--mm/compaction.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/mm/compaction.c b/mm/compaction.c
index d8187f9cabbf..2c4ce17651d8 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -461,6 +461,7 @@ static bool too_many_isolated(struct zone *zone)
* @cc: Compaction control structure.
* @low_pfn: The first PFN of the range.
* @end_pfn: The one-past-the-last PFN of the range.
+ * @unevictable: true if it allows to isolate unevictable pages
*
* Isolate all pages that can be migrated from the range specified by
* [low_pfn, end_pfn). Returns zero if there is a fatal signal
@@ -476,7 +477,7 @@ static bool too_many_isolated(struct zone *zone)
*/
unsigned long
isolate_migratepages_range(struct zone *zone, struct compact_control *cc,
- unsigned long low_pfn, unsigned long end_pfn)
+ unsigned long low_pfn, unsigned long end_pfn, bool unevictable)
{
unsigned long last_pageblock_nr = 0, pageblock_nr;
unsigned long nr_scanned = 0, nr_isolated = 0;
@@ -602,6 +603,9 @@ isolate_migratepages_range(struct zone *zone, struct compact_control *cc,
if (!cc->sync)
mode |= ISOLATE_ASYNC_MIGRATE;
+ if (unevictable)
+ mode |= ISOLATE_UNEVICTABLE;
+
lruvec = mem_cgroup_page_lruvec(page, zone);
/* Try isolate the page */
@@ -807,7 +811,7 @@ static isolate_migrate_t isolate_migratepages(struct zone *zone,
}
/* Perform the isolation */
- low_pfn = isolate_migratepages_range(zone, cc, low_pfn, end_pfn);
+ low_pfn = isolate_migratepages_range(zone, cc, low_pfn, end_pfn, false);
if (!low_pfn || cc->contended)
return ISOLATE_ABORT;