linux-kernel - [PATCH v2 1/2] f2fs: fix gc mode when gc_urgent_high

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Message-Id: <20221025065025.35017-1-frank.li@vivo.com>
Date:   Tue, 25 Oct 2022 14:50:24 +0800
From:   Yangtao Li <frank.li@...o.com>
To:     jaegeuk@...nel.org, chao@...nel.org
Cc:     linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, Yangtao Li <frank.li@...o.com>
Subject: [PATCH v2 1/2] f2fs: fix gc mode when gc_urgent_high_remaining is 1

Under the current logic, when gc_urgent_high_remaining is set to 1,
the mode will be switched to normal at the beginning, instead of
running in gc_urgent mode.

Let's switch the gc mode back to normal when the gc ends.

Fixes: 265576181b4a ("f2fs: remove gc_urgent_high_limited for cleanup")

Signed-off-by: Yangtao Li <frank.li@...o.com>
---
 fs/f2fs/gc.c | 19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 4546e01b2ee0..e0ff99c7e3f2 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -96,16 +96,6 @@ static int gc_thread_func(void *data)
 		 * invalidated soon after by user update or deletion.
 		 * So, I'd like to wait some time to collect dirty segments.
 		 */
-		if (sbi->gc_mode == GC_URGENT_HIGH) {
-			spin_lock(&sbi->gc_urgent_high_lock);
-			if (sbi->gc_urgent_high_remaining) {
-				sbi->gc_urgent_high_remaining--;
-				if (!sbi->gc_urgent_high_remaining)
-					sbi->gc_mode = GC_NORMAL;
-			}
-			spin_unlock(&sbi->gc_urgent_high_lock);
-		}
-
 		if (sbi->gc_mode == GC_URGENT_HIGH ||
 				sbi->gc_mode == GC_URGENT_MID) {
 			wait_ms = gc_th->urgent_sleep_time;
@@ -162,6 +152,15 @@ static int gc_thread_func(void *data)
 		/* balancing f2fs's metadata periodically */
 		f2fs_balance_fs_bg(sbi, true);
 next:
+		if (sbi->gc_mode == GC_URGENT_HIGH) {
+			spin_lock(&sbi->gc_urgent_high_lock);
+			if (sbi->gc_urgent_high_remaining) {
+				sbi->gc_urgent_high_remaining--;
+				if (!sbi->gc_urgent_high_remaining)
+					sbi->gc_mode = GC_NORMAL;
+			}
+			spin_unlock(&sbi->gc_urgent_high_lock);
+		}
 		sb_end_write(sbi->sb);
 
 	} while (!kthread_should_stop());
-- 
2.25.1