f2fs: produce more nids and reduce readahead nats
The readahead nat pages are more likely to be reclaimed quickly, so it'd better
to gather more free nids in advance.
And, let's keep some free nids as much as possible.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/shrinker.c b/fs/f2fs/shrinker.c
index 93606f2..46c91542 100644
--- a/fs/f2fs/shrinker.c
+++ b/fs/f2fs/shrinker.c
@@ -13,6 +13,7 @@
#include <linux/f2fs_fs.h>
#include "f2fs.h"
+#include "node.h"
static LIST_HEAD(f2fs_list);
static DEFINE_SPINLOCK(f2fs_list_lock);
@@ -25,8 +26,8 @@
static unsigned long __count_free_nids(struct f2fs_sb_info *sbi)
{
- if (NM_I(sbi)->fcnt > NAT_ENTRY_PER_BLOCK)
- return NM_I(sbi)->fcnt - NAT_ENTRY_PER_BLOCK;
+ if (NM_I(sbi)->fcnt > MAX_FREE_NIDS)
+ return NM_I(sbi)->fcnt - MAX_FREE_NIDS;
return 0;
}