On 10/10/2016 05:35 AM, Xishi Qiu wrote:
We will use gfp_mask in the following path, but it's not init.
kcompactd_do_work
compact_zone
gfpflags_to_migratetype
However if not init, gfp_mask is always 0, and the result of
gfpflags_to_migratetype(0) and gfpflags_to_migratetype(GFP_KERNEL)
are the same, but it's a little confusion, so init it first.
Michal already did this as part of his patch, as it was needed to avoid
wrongly restricting kcompactd to anonymous pages:
http://lkml.kernel.org/r/<20161007065019.GA18439@xxxxxxxxxxxxxx>
Signed-off-by: Xishi Qiu <qiuxishi@xxxxxxxxxx>
---
mm/compaction.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/compaction.c b/mm/compaction.c
index 9affb29..4b9a9d1 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -1895,10 +1895,10 @@ static void kcompactd_do_work(pg_data_t *pgdat)
struct zone *zone;
struct compact_control cc = {
.order = pgdat->kcompactd_max_order,
+ .gfp_mask = GFP_KERNEL,
.classzone_idx = pgdat->kcompactd_classzone_idx,
.mode = MIGRATE_SYNC_LIGHT,
.ignore_skip_hint = true,
-
};
bool success = false;
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxx. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>