Put the blk_throtl_dirty_pages() hook in
balance_dirty_pages_ratelimited_nr() to enable task throttling.
Signed-off-by: Vivek Goyal <vgoyal@xxxxxxxxxx>
---
include/linux/blkdev.h | 5 +++++
mm/page-writeback.c | 3 +++
2 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 4ce6e68..5d4a57e 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1180,12 +1180,17 @@ static inline uint64_t rq_io_start_time_ns(struct request *req)
extern int blk_throtl_init(struct request_queue *q);
extern void blk_throtl_exit(struct request_queue *q);
extern int blk_throtl_bio(struct request_queue *q, struct bio **bio);
+extern void blk_throtl_dirty_pages(struct address_space *mapping,
+ unsigned long nr_dirty);
#else /* CONFIG_BLK_DEV_THROTTLING */
static inline int blk_throtl_bio(struct request_queue *q, struct bio **bio)
{
return 0;
}
+static inline void blk_throtl_dirty_pages(struct address_space *mapping,
+ unsigned long nr_dirty) {}
+
static inline int blk_throtl_init(struct request_queue *q) { return 0; }
static inline int blk_throtl_exit(struct request_queue *q) { return 0; }
#endif /* CONFIG_BLK_DEV_THROTTLING */
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 31f6988..943e551 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -629,6 +629,9 @@ void balance_dirty_pages_ratelimited_nr(struct address_space *mapping,
unsigned long ratelimit;
unsigned long *p;
+ /* Subject writes to IO controller throttling */
+ blk_throtl_dirty_pages(mapping, nr_pages_dirtied);
+
ratelimit = ratelimit_pages;
if (mapping->backing_dev_info->dirty_exceeded)
ratelimit = 8;
--
1.7.4.4
--
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