linux-kernel - [PATCH 05/10] writeback: call domain_dirty_avail in balance_dirty

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Date: Mon, 29 Apr 2024 11:47:33 +0800
From: Kemeng Shi <shikemeng@...weicloud.com>
To: willy@...radead.org,
	akpm@...ux-foundation.org,
	jack@...e.cz,
	tj@...nel.org
Cc: linux-fsdevel@...r.kernel.org,
	linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 05/10] writeback: call domain_dirty_avail in balance_dirty_pages

Call domain_dirty_avail in balance_dirty_pages to remove repeated code.
This is also a preparation to factor out repeated code calculating
dirty limits in balance_dirty_pages.

Signed-off-by: Kemeng Shi <shikemeng@...weicloud.com>
---
 mm/page-writeback.c | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index a1d48e8387ed..c41db87f4e98 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -1747,9 +1747,8 @@ static int balance_dirty_pages(struct bdi_writeback *wb,
 		unsigned long m_bg_thresh = 0;
 
 		nr_dirty = global_node_page_state(NR_FILE_DIRTY);
-		gdtc->avail = global_dirtyable_memory();
-		gdtc->dirty = nr_dirty + global_node_page_state(NR_WRITEBACK);
 
+		domain_dirty_avail(gdtc, false);
 		domain_dirty_limits(gdtc);
 
 		if (unlikely(strictlimit)) {
@@ -1765,17 +1764,11 @@ static int balance_dirty_pages(struct bdi_writeback *wb,
 		}
 
 		if (mdtc) {
-			unsigned long filepages, headroom, writeback;
-
 			/*
 			 * If @wb belongs to !root memcg, repeat the same
 			 * basic calculations for the memcg domain.
 			 */
-			mem_cgroup_wb_stats(wb, &filepages, &headroom,
-					    &mdtc->dirty, &writeback);
-			mdtc->dirty += writeback;
-			mdtc_calc_avail(mdtc, filepages, headroom);
-
+			domain_dirty_avail(mdtc, false);
 			domain_dirty_limits(mdtc);
 
 			if (unlikely(strictlimit)) {
-- 
2.30.0