commit d0239e1bf5204d602281f93c01d46bcf3531098d
author Jaegeuk Kim <jaegeuk@kernel.org> Fri Jan 08 16:57:48 2016 -0800
committer Jaegeuk Kim <jaegeuk@kernel.org> Mon Jan 11 15:56:37 2016 -0800
tree e95f1b3567398de0dbe532689671050325e79eb5
parent 6beceb5427aa8731f958d2484e0fd8ff21d604dc

f2fs: detect idle time depending on user behavior

This patch adds last time that user requested filesystem operations.
This information is used to detect whether system is idle or not later.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/segment.c

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index fed23d5..d8ad1ab 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -293,7 +293,7 @@
 	if (!available_free_memory(sbi, NAT_ENTRIES) ||
 			excess_prefree_segs(sbi) ||
 			!available_free_memory(sbi, INO_ENTRIES) ||
-			f2fs_time_over(sbi, CP_TIME)) {
+			(is_idle(sbi) && f2fs_time_over(sbi, CP_TIME))) {
 		if (test_opt(sbi, DATA_FLUSH))
 			sync_dirty_inodes(sbi, FILE_INODE);
 		f2fs_sync_fs(sbi->sb, true);