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Subject[PATCH 10/10] writeback: factor out balance_wb_limits to remove repeated code
Date
Factor out balance_wb_limits to remove repeated code

Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
---
mm/page-writeback.c | 21 +++++++++++++--------
1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 26b638cc58c5..4949036e6286 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -1790,6 +1790,17 @@ static inline void wb_dirty_exceeded(struct dirty_throttle_control *dtc,
((dtc->dirty > dtc->thresh) || strictlimit);
}

+static void balance_wb_limits(struct dirty_throttle_control *dtc,
+ bool strictlimit)
+{
+ wb_dirty_freerun(dtc, strictlimit);
+ if (dtc->freerun)
+ return;
+
+ wb_dirty_exceeded(dtc, strictlimit);
+ wb_position_ratio(dtc);
+}
+
/*
* balance_dirty_pages() must be called by processes which are generating dirty
* data. It looks at the number of dirty pages in the machine and will force
@@ -1875,12 +1886,9 @@ static int balance_dirty_pages(struct bdi_writeback *wb,
* Calculate global domain's pos_ratio and select the
* global dtc by default.
*/
- wb_dirty_freerun(gdtc, strictlimit);
+ balance_wb_limits(gdtc, strictlimit);
if (gdtc->freerun)
goto free_running;
-
- wb_dirty_exceeded(gdtc, strictlimit);
- wb_position_ratio(gdtc);
sdtc = gdtc;

if (mdtc) {
@@ -1890,12 +1898,9 @@ static int balance_dirty_pages(struct bdi_writeback *wb,
* both global and memcg domains. Choose the one
* w/ lower pos_ratio.
*/
- wb_dirty_freerun(mdtc, strictlimit);
+ balance_wb_limits(mdtc, strictlimit);
if (mdtc->freerun)
goto free_running;
-
- wb_dirty_exceeded(mdtc, strictlimit);
- wb_position_ratio(mdtc);
if (mdtc->pos_ratio < gdtc->pos_ratio)
sdtc = mdtc;
}
--
2.30.0

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