From: Chao Yu <yuchao0@huawei.com>
Date: Thu, 26 Apr 2018 09:05:50 +0000 (+0800)
Subject: f2fs: treat volatile file's data as hot one
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=b4c3ca8ba9a447ea5d1b3dd1082f112c8dda3562;p=linux.git

f2fs: treat volatile file's data as hot one

Volatile file's data will be updated oftenly, so it'd better to place
its data into hot data segment.

In addition, for atomic file, we change to check FI_ATOMIC_FILE instead
of FI_HOT_DATA to make code readability better.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 8af352c3239d9..26b32108b09b9 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -1696,7 +1696,6 @@ static int f2fs_ioc_start_atomic_write(struct file *filp)
 	if (ret)
 		goto out;
 skip_flush:
-	set_inode_flag(inode, FI_HOT_DATA);
 	set_inode_flag(inode, FI_ATOMIC_FILE);
 	f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
 
@@ -1739,7 +1738,6 @@ static int f2fs_ioc_commit_atomic_write(struct file *filp)
 		ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true);
 		if (!ret) {
 			clear_inode_flag(inode, FI_ATOMIC_FILE);
-			clear_inode_flag(inode, FI_HOT_DATA);
 			stat_dec_atomic_write(inode);
 		}
 	} else {
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 916b16e768fb6..9937265a63c5f 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -309,7 +309,6 @@ void drop_inmem_pages(struct inode *inode)
 	mutex_unlock(&fi->inmem_lock);
 
 	clear_inode_flag(inode, FI_ATOMIC_FILE);
-	clear_inode_flag(inode, FI_HOT_DATA);
 	stat_dec_atomic_write(inode);
 }
 
@@ -2613,7 +2612,9 @@ static int __get_segment_type_6(struct f2fs_io_info *fio)
 		if (is_cold_data(fio->page) || file_is_cold(inode))
 			return CURSEG_COLD_DATA;
 		if (file_is_hot(inode) ||
-				is_inode_flag_set(inode, FI_HOT_DATA))
+				is_inode_flag_set(inode, FI_HOT_DATA) ||
+				is_inode_flag_set(inode, FI_ATOMIC_FILE) ||
+				is_inode_flag_set(inode, FI_VOLATILE_FILE))
 			return CURSEG_HOT_DATA;
 		return rw_hint_to_seg_type(inode->i_write_hint);
 	} else {