> -----Original Message-----
> From: Chao Yu [mailto:chao2...@samsung.com]
> Sent: Thursday, December 05, 2013 9:55 AM
> To: ???
> Cc: linux-fsde...@vger.kernel.org; linux-kernel@vger.kernel.org;
> linux-f2fs-de...@lists.sourceforge.net
> Subject: [f2fs-dev] [PATCH 3/3] f2fs: introduce f2fs_cache_node_page() to add
> page into node_inode cache
>
> 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 <chao2...@samsung.com>
Suggested-by: Jaegeuk Kim <jaegeuk....@samsung.com>
I miss that, my mistake.
> ---
> 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
>
>
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