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f2fs: lookup extent cache first under IPU scenario

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If a page is cold, NOT atomit written and need_ipu now, there is
a high probability that IPU should be adapted. For IPU, we try to
check extent tree to get the block index first, instead of reading
the dnode page, where may lead to an useless dnode IO, since no need to
update the dnode index for IPU.

Signed-off-by: Hou Pengyang <houpengyang@huawei.com>
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Hou Pengyang 2017-04-25 12:45:13 +00:00 • committed by Jaegeuk Kim
parent 7eab0c0df8
commit e959c8f543
3 changed files with 16 additions and 2 deletions
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1
fs/f2fs/segment.c
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@ -311,6 +311,7 @@ static int __commit_inmem_pages(struct inode *inode,
}
fio.page = page;
fio.old_blkaddr = NULL_ADDR;
err = do_write_data_page(&fio);
if (err) {
unlock_page(page);