From e0f56cb44b05abacb6aa8fa8695c28431e84b7a0 Mon Sep 17 00:00:00 2001 From: Namjae Jeon Date: Sat, 2 Feb 2013 23:51:51 +0900 Subject: [PATCH] f2fs: optimize get node page readahead part We can remove the call to find_get_page to get a page from the cache and check for up-to-date, instead we can make use of grab_cache_page part itself to fetch the page from the cache. So, removing the call and moving the PageUptodate at proper place, also taken care of moving the lock_page condition in the page_hit part. Signed-off-by: Namjae Jeon Signed-off-by: Amit Sahrawat Signed-off-by: Jaegeuk Kim --- fs/f2fs/node.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index d408e69294c8..58f7216993c7 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -921,19 +921,17 @@ struct page *get_node_page_ra(struct page *parent, int start) if (!nid) return ERR_PTR(-ENOENT); - page = find_get_page(mapping, nid); - if (page && PageUptodate(page)) - goto page_hit; - f2fs_put_page(page, 0); - repeat: page = grab_cache_page(mapping, nid); if (!page) return ERR_PTR(-ENOMEM); + else if (PageUptodate(page)) + goto page_hit; err = read_node_page(page, READ_SYNC); + unlock_page(page); if (err) { - f2fs_put_page(page, 1); + f2fs_put_page(page, 0); return ERR_PTR(err); } @@ -947,8 +945,9 @@ repeat: ra_node_page(sbi, nid); } -page_hit: lock_page(page); + +page_hit: if (PageError(page)) { f2fs_put_page(page, 1); return ERR_PTR(-EIO); -- 2.30.2