From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933422Ab3LEBzn (ORCPT ); Wed, 4 Dec 2013 20:55:43 -0500 Received: from mailout3.samsung.com ([203.254.224.33]:31813 "EHLO mailout3.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756324Ab3LEBzj (ORCPT ); Wed, 4 Dec 2013 20:55:39 -0500 X-AuditID: cbfee61a-b7f796d000004313-f1-529fdd19b699 From: Chao Yu To: ??? Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, =?gb2312?B?zLfmrQ==?= Subject: [f2fs-dev] [PATCH 3/3] f2fs: introduce f2fs_cache_node_page() to add page into node_inode cache Date: Thu, 05 Dec 2013 09:54:56 +0800 Message-id: <001701cef15d$169a5a30$43cf0e90$@samsung.com> MIME-version: 1.0 Content-type: text/plain; charset=gb2312 Content-transfer-encoding: 7bit X-Mailer: Microsoft Outlook 14.0 Thread-index: Ac7xW57rkvBulRtcTFywPeFMBA87vA== Content-language: zh-cn X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrMLMWRmVeSWpSXmKPExsVy+t9jAV2pu/ODDE43MFlc3/WXyeLSIneL PXtPslhc3jWHzaJ14XlmB1aP3Qs+M3n0bVnF6PF5k1wAcxSXTUpqTmZZapG+XQJXxsXpy1gL LvBUND3fyN7AOIOri5GTQ0LARKLnxVZGCFtM4sK99WxdjFwcQgKLGCW2dK1hBkkICfxglJjy 0RrEZhNQkVje8Z8JxBYRUJTY8H4DO0gDs8AMRonDc/+xgiSEBbIkfjYsAytiEVCV2PLnGNgg XgFLiVstV6BsQYkfk++xgNjMAhoS/Ys2sEHY8hKb17xlhrhIQWLH2deMEMv0JPbtPcwKUSMu sfHILZYJjAKzkIyahWTULCSjZiFpWcDIsopRNLUguaA4KT3XUK84Mbe4NC9dLzk/dxMjOKif Se1gXNlgcYhRgINRiYf3ReL8ICHWxLLiytxDjBIczEoivPVXgUK8KYmVValF+fFFpTmpxYcY pTlYlMR5D7RaBwoJpCeWpGanphakFsFkmTg4pRoYWbreZ5qm8Boq7V6w8GFndse35QqGVyT/ rUxqlHBY4rki/O2JUxLf5cqvPAhW1WN2v3N3nfTk5qB1Lx4o2LBe6vm8zlJj+eK/zpuucW59 K3ns9zsRO/nKE2L127zMgo7/U+BMP1qnZ2vF8/fc57v8mtEbWSUeGfTdXLk0oLVrzXGDpI8L rS4dUGIpzkg01GIuKk4EAM1GqPJmAgAA Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch introduces f2fs_cache_node_page(), in this function, page which is readed ahead will be copy to node_inode's mapping cache. It will avoid rereading these node pages. Signed-off-by: Chao Yu --- fs/f2fs/node.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index 099f06f..5e2588f 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -1600,6 +1600,34 @@ static int ra_sum_pages(struct f2fs_sb_info *sbi, struct list_head *pages, return 0; } +/* + * f2fs_cache_node_page() copy updated page data to node_inode cache page. + */ +void f2fs_cache_node_page(struct f2fs_sb_info *sbi, struct page *page, + nid_t nid) +{ + struct address_space *mapping = sbi->node_inode->i_mapping; + struct page *npage; + + npage = find_get_page(mapping, nid); + if (npage && PageUptodate(npage)) { + f2fs_put_page(npage, 0); + return; + } + f2fs_put_page(npage, 0); + + npage = grab_cache_page(mapping, nid); + if (!npage) + return; + + memcpy(page_address(npage), page_address(page), PAGE_CACHE_SIZE); + + SetPageUptodate(npage); + f2fs_put_page(npage, 1); + + return; +} + int restore_node_summary(struct f2fs_sb_info *sbi, unsigned int segno, struct f2fs_summary_block *sum) { @@ -1633,6 +1661,8 @@ int restore_node_summary(struct f2fs_sb_info *sbi, sum_entry->version = 0; sum_entry->ofs_in_node = 0; sum_entry++; + f2fs_cache_node_page(sbi, page, + le32_to_cpu(rn->footer.nid)); } else { err = -EIO; } -- 1.7.9.5