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Subject[PATCH 03/11] writeback: add bg_threshold parameter to __bdi_update_bandwidth()
No behavior change.

Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
---
fs/fs-writeback.c | 2 +-
include/linux/writeback.h | 1 +
mm/page-writeback.c | 11 +++++++----
3 files changed, 9 insertions(+), 5 deletions(-)
--- linux-next.orig/mm/page-writeback.c 2011-10-03 20:44:55.000000000 +0800
+++ linux-next/mm/page-writeback.c 2011-10-03 20:46:17.000000000 +0800
@@ -779,6 +779,7 @@ static void global_update_bandwidth(unsi

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
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 a
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
--- linux-next.orig/fs/fs-writeback.c 2011-10-03 20:44:51.000000000 +0800
+++ linux-next/fs/fs-writeback.c 2011-10-03 20:45:27.000000000 +0800
@@ -675,7 +675,7 @@ static inline bool over_bground_thresh(v
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);
}

/*
--- linux-next.orig/include/linux/writeback.h 2011-10-03 20:44:51.000000000 +0800
+++ linux-next/include/linux/writeback.h 2011-10-03 20:45:27.000000000 +0800
@@ -143,6 +143,7 @@ unsigned long bdi_dirty_limit(struct bac

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,



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