writeback: add bg_threshold parameter to __bdi_update_bandwidth()

No behavior change.

Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>

diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 04cf3b91e5016a1f7e3ceef734c7d85574ec296d..28076562ada0d2fc472f716931e9803e027bb400 100644 (file)
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -675,7 +675,7 @@ static inline bool over_bground_thresh(void)
 static void wb_update_bandwidth(struct bdi_writeback *wb,
                                unsigned long start_time)
 {
-       __bdi_update_bandwidth(wb->bdi, 0, 0, 0, 0, start_time);
+       __bdi_update_bandwidth(wb->bdi, 0, 0, 0, 0, 0, start_time);
 }
 
 /*

diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index 2b8963ff0f359b4c6dab919e2ccc3c2c0324b5bb..ddb4652cb337ed94ea9ca35cd8448af3f6cf515c 100644 (file)
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -143,6 +143,7 @@ unsigned long bdi_dirty_limit(struct backing_dev_info *bdi,
 
 void __bdi_update_bandwidth(struct backing_dev_info *bdi,
                            unsigned long thresh,
+                           unsigned long bg_thresh,
                            unsigned long dirty,
                            unsigned long bdi_thresh,
                            unsigned long bdi_dirty,

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index c16ddd8f5cb6b714171be703dd53947bfb80ccdb..4b954c9fe8469f51177ffb3eeb7287ee91cfd09b 100644 (file)
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -779,6 +779,7 @@ static void global_update_bandwidth(unsigned long thresh,
 
 void __bdi_update_bandwidth(struct backing_dev_info *bdi,
                            unsigned long thresh,
+                           unsigned long bg_thresh,
                            unsigned long dirty,
                            unsigned long bdi_thresh,
                            unsigned long bdi_dirty,
@@ -815,6 +816,7 @@ snapshot:
 
 static void bdi_update_bandwidth(struct backing_dev_info *bdi,
                                 unsigned long thresh,
+                                unsigned long bg_thresh,
                                 unsigned long dirty,
                                 unsigned long bdi_thresh,
                                 unsigned long bdi_dirty,
@@ -823,8 +825,8 @@ static void bdi_update_bandwidth(struct backing_dev_info *bdi,
        if (time_is_after_eq_jiffies(bdi->bw_time_stamp + BANDWIDTH_INTERVAL))
                return;
        spin_lock(&bdi->wb.list_lock);
-       __bdi_update_bandwidth(bdi, thresh, dirty, bdi_thresh, bdi_dirty,
-                              start_time);
+       __bdi_update_bandwidth(bdi, thresh, bg_thresh, dirty,
+                              bdi_thresh, bdi_dirty, start_time);
        spin_unlock(&bdi->wb.list_lock);
 }
 
@@ -912,8 +914,9 @@ static void balance_dirty_pages(struct address_space *mapping,
                if (!bdi->dirty_exceeded)
                        bdi->dirty_exceeded = 1;
 
-               bdi_update_bandwidth(bdi, dirty_thresh, nr_dirty,
-                                    bdi_thresh, bdi_dirty, start_time);
+               bdi_update_bandwidth(bdi, dirty_thresh, background_thresh,
+                                    nr_dirty, bdi_thresh, bdi_dirty,
+                                    start_time);
 
                /* Note: nr_reclaimable denotes nr_dirty + nr_unstable.
                 * Unstable writes are a feature of certain networked