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f2fs: produce more nids and reduce readahead nats

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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>
This commit is contained in:
Jaegeuk Kim
2016-06-16 16:41:49 -07:00
parent 52763a4b7a
commit ad4edb8314
6 changed files with 18 additions and 8 deletions
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5
fs/f2fs/shrinker.c
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@@ -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_nat_entries(struct f2fs_sb_info *sbi)
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;
}