From 98e92867b99761979f6d4c155b7d5a5b523412a3 Mon Sep 17 00:00:00 2001
From: Chao Yu <chao@kernel.org>
Date: Fri, 18 Mar 2022 17:02:30 +0800
Subject: [PATCH] f2fs: use aggressive GC policy during
f2fs_disable_checkpoint()
Let's enable GC_URGENT_HIGH mode during f2fs_disable_checkpoint(),
so that we can use SSR allocator for GCed data/node persistence,
it can improve the performance due to it avoiding migration of
data/node locates in selected target segment of SSR allocator.
Signed-off-by: Chao Yu <chao.yu@oppo.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
fs/f2fs/super.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 9176597fdf94..caceb80b87ec 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -2080,6 +2080,7 @@ static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
{
unsigned int s_flags = sbi->sb->s_flags;
struct cp_control cpc;
+ unsigned int gc_mode;
int err = 0;
int ret;
block_t unusable;
@@ -2092,6 +2093,9 @@ static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
f2fs_update_time(sbi, DISABLE_TIME);
+ gc_mode = sbi->gc_mode;
+ sbi->gc_mode = GC_URGENT_HIGH;
+
while (!f2fs_time_over(sbi, DISABLE_TIME)) {
f2fs_down_write(&sbi->gc_lock);
err = f2fs_gc(sbi, true, false, false, NULL_SEGNO);
@@ -2129,6 +2133,7 @@ static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
out_unlock:
f2fs_up_write(&sbi->gc_lock);
restore_flag:
+ sbi->gc_mode = gc_mode;
sbi->sb->s_flags = s_flags; /* Restore SB_RDONLY status */
return err;
}