linux-kernel - [PATCH AUTOSEL 4.9 41/99] f2fs: fix to spread clear_cold

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Date:   Sat, 16 Nov 2019 10:50:04 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Chao Yu <yuchao0@...wei.com>, Weichao Guo <guoweichao@...wei.com>,
        Jaegeuk Kim <jaegeuk@...nel.org>,
        Sasha Levin <sashal@...nel.org>,
        linux-f2fs-devel@...ts.sourceforge.net
Subject: [PATCH AUTOSEL 4.9 41/99] f2fs: fix to spread clear_cold_data()

From: Chao Yu <yuchao0@...wei.com>

[ Upstream commit 2baf07818549c8bb8d7b3437e889b86eab56d38e ]

We need to drop PG_checked flag on page as well when we clear PG_uptodate
flag, in order to avoid treating the page as GCing one later.

Signed-off-by: Weichao Guo <guoweichao@...wei.com>
Signed-off-by: Chao Yu <yuchao0@...wei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 fs/f2fs/data.c    | 8 +++++++-
 fs/f2fs/dir.c     | 1 +
 fs/f2fs/segment.c | 4 +++-
 3 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 9041805096e0c..0206c8c20784c 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1201,6 +1201,7 @@ int do_write_data_page(struct f2fs_io_info *fio)
 	/* This page is already truncated */
 	if (fio->old_blkaddr == NULL_ADDR) {
 		ClearPageUptodate(page);
+		clear_cold_data(page);
 		goto out_writepage;
 	}
 
@@ -1337,8 +1338,10 @@ static int f2fs_write_data_page(struct page *page,
 	clear_cold_data(page);
 out:
 	inode_dec_dirty_pages(inode);
-	if (err)
+	if (err) {
 		ClearPageUptodate(page);
+		clear_cold_data(page);
+	}
 
 	if (wbc->for_reclaim) {
 		f2fs_submit_merged_bio_cond(sbi, NULL, page, 0, DATA, WRITE);
@@ -1821,6 +1824,8 @@ void f2fs_invalidate_page(struct page *page, unsigned int offset,
 			inode_dec_dirty_pages(inode);
 	}
 
+	clear_cold_data(page);
+
 	/* This is atomic written page, keep Private */
 	if (IS_ATOMIC_WRITTEN_PAGE(page))
 		return;
@@ -1839,6 +1844,7 @@ int f2fs_release_page(struct page *page, gfp_t wait)
 	if (IS_ATOMIC_WRITTEN_PAGE(page))
 		return 0;
 
+	clear_cold_data(page);
 	set_page_private(page, 0);
 	ClearPagePrivate(page);
 	return 1;
diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index af719d93507e8..b414892be08b7 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -772,6 +772,7 @@ void f2fs_delete_entry(struct f2fs_dir_entry *dentry, struct page *page,
 		clear_page_dirty_for_io(page);
 		ClearPagePrivate(page);
 		ClearPageUptodate(page);
+		clear_cold_data(page);
 		inode_dec_dirty_pages(dir);
 	}
 	f2fs_put_page(page, 1);
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 1d5a352138109..c4c84af1ec17a 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -227,8 +227,10 @@ static int __revoke_inmem_pages(struct inode *inode,
 		}
 next:
 		/* we don't need to invalidate this in the sccessful status */
-		if (drop || recover)
+		if (drop || recover) {
 			ClearPageUptodate(page);
+			clear_cold_data(page);
+		}
 		set_page_private(page, 0);
 		ClearPagePrivate(page);
 		f2fs_put_page(page, 1);
-- 
2.20.1