linux-kernel - [PATCH 2/2] f2fs: optimize build_free

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Date:	Fri,  3 May 2013 20:43:23 +0800
From:	Haicheng Li <haicheng.li@...ux.intel.com>
To:	linux-fsdevel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net,
	Jaegeuk Kim <jaegeuk.kim@...sung.com>
Cc:	linux-kernel@...r.kernel.org, Haicheng Li <haicheng.lee@...il.com>,
	Haicheng Li <haicheng.li@...ux.intel.com>
Subject: [PATCH 2/2] f2fs: optimize build_free_nids()

When nm_i->fcnt > 2 * MAX_FREE_NIDS, stop scanning other NAT pages.

Signed-off-by: Haicheng Li <haicheng.li@...ux.intel.com>
---
 fs/f2fs/node.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 6276467..31d038f 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -1307,7 +1307,7 @@ static void build_free_nids(struct f2fs_sb_info *sbi)
 			nid = 0;
 			is_cycled = true;
 		}
-		if (fcnt > MAX_FREE_NIDS)
+		if (fcnt > MAX_FREE_NIDS || nm_i->fcnt > 2 * MAX_FREE_NIDS)
 			break;
 		if (is_cycled && nm_i->init_scan_nid <= nid)
 			break;
-- 
1.7.9.5

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