From: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Cc: Jaegeuk Kim <jaegeuk.kim@samsung.com>, linux-fsdevel@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net
Subject: [PATCH 3/4] f2fs: no need to wait on page writebck to meta pages
Date: Wed, 30 Apr 2014 11:33:42 +0900
Message-id: <1398825223-23062-3-git-send-email-jaegeuk.kim@samsung.com>
In-reply-to: <1398825223-23062-1-git-send-email-jaegeuk.kim@samsung.com>
References: <1398825223-23062-1-git-send-email-jaegeuk.kim@samsung.com>
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This patch removes grab_cache_page_write_begin for meta pages.

Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
---
 fs/f2fs/checkpoint.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 1346ce9..b6f6ead 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -33,11 +33,14 @@ struct page *grab_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
 	struct address_space *mapping = META_MAPPING(sbi);
 	struct page *page = NULL;
 repeat:
-	page = grab_cache_page_write_begin(mapping, index, AOP_FLAG_NOFS);
+	page = grab_cache_page(mapping, index);
 	if (!page) {
 		cond_resched();
 		goto repeat;
 	}
+	/* meta pages should not be under writeback */
+	if (PageWriteback(page))
+		WARN_ON(1);
 
 	SetPageUptodate(page);
 	return page;
-- 
1.8.4.474.g128a96c

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