From: Jaegeuk Kim <jaegeuk@kernel.org>
Date: Fri, 7 Nov 2014 01:21:24 +0000 (-0800)
Subject: f2fs: write node pages if checkpoint is not doing
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=2f97c326bf05ca2feeb95688da50c68671638b69;p=deliverable%2Flinux.git

f2fs: write node pages if checkpoint is not doing

It needs to write node pages if checkpoint is not doing in order to avoid
memory pressure.

Reviewed-by: Changman Lee <cm224.lee@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 4ea2c4728156..6f514fb5fd96 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -1314,10 +1314,12 @@ static int f2fs_write_node_page(struct page *page,
 		return 0;
 	}
 
-	if (wbc->for_reclaim)
-		goto redirty_out;
-
-	down_read(&sbi->node_write);
+	if (wbc->for_reclaim) {
+		if (!down_read_trylock(&sbi->node_write))
+			goto redirty_out;
+	} else {
+		down_read(&sbi->node_write);
+	}
 	set_page_writeback(page);
 	write_node_page(sbi, page, &fio, nid, ni.blk_addr, &new_addr);
 	set_node_addr(sbi, &ni, new_addr, is_fsync_dnode(page));