f2fs: introduce a periodic checkpoint flow
This patch introduces a periodic checkpoint feature.
Note that, this is not enforcing to conduct checkpoints very strictly in terms
of trigger timing, instead just hope to help user experiences.
The default value is 60 seconds.
Reviewed-by: Chao Yu <[email protected]>
Signed-off-by: Jaegeuk Kim <[email protected]>
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 6b8edf2..1d86a35 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -15,6 +15,7 @@
#include <linux/prefetch.h>
#include <linux/kthread.h>
#include <linux/swap.h>
+#include <linux/timer.h>
#include "f2fs.h"
#include "segment.h"
@@ -315,7 +316,8 @@
/* checkpoint is the only way to shrink partial cached entries */
if (!available_free_memory(sbi, NAT_ENTRIES) ||
excess_prefree_segs(sbi) ||
- !available_free_memory(sbi, INO_ENTRIES))
+ !available_free_memory(sbi, INO_ENTRIES) ||
+ jiffies > sbi->cp_expires)
f2fs_sync_fs(sbi->sb, true);
}
