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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 <namjae.jeon@samsung.com>
Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
hifive-unleashed-5.1
Namjae Jeon 2013-02-02 23:51:51 +09:00 committed by Jaegeuk Kim
parent 52c2db3f95
commit e0f56cb44b
1 changed files with 6 additions and 7 deletions
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13
fs/f2fs/node.c
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@ -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);