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 <[email protected]> --- fs/f2fs/data.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 4ba11a6..3a660f7 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -1355,8 +1355,34 @@ int do_write_data_page(struct f2fs_io_info *fio) struct page *page = fio->page; struct inode *inode = page->mapping->host; struct dnode_of_data dn; + struct extent_info ei = {0,0,0}; int err = 0; + /* + * 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. + */ + if (unlikely(!is_cold_data(page) && + !IS_ATOMIC_WRITTEN_PAGE(page) && + need_inplace_update(inode, fio) && + f2fs_lookup_extent_cache(inode, page->index, &ei))) { + + fio->old_blkaddr = ei.blk + page->index - ei.fofs; + + if (fio->old_blkaddr != NEW_ADDR && + fio->old_blkaddr != NULL_ADDR) { + err = f2fs_encrypt_page(fio, page); + if (err) + return err; + set_page_writeback(page); + err = do_rewrite_data_page(fio, page); + return err; + } + } + set_new_dnode(&dn, inode, NULL, NULL, 0); err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE); if (err) -- 2.10.1 ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Linux-f2fs-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
