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f2fs: lookup extent cache first under IPU scenario 

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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16
fs/f2fs/data.c
View File

@ -1350,9 +1350,20 @@ 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};
bool ipu_force = false;
int err = 0;
set_new_dnode(&dn, inode, NULL, NULL, 0);
if (need_inplace_update(fio) &&
f2fs_lookup_extent_cache(inode, page->index, &ei)) {
fio->old_blkaddr = ei.blk + page->index - ei.fofs;
if (fio->old_blkaddr != NULL_ADDR &&
fio->old_blkaddr != NEW_ADDR) {
ipu_force = true;
goto got_it;
}
}
err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE);
if (err)
return err;
@ -1364,7 +1375,7 @@ int do_write_data_page(struct f2fs_io_info *fio)
ClearPageUptodate(page);
goto out_writepage;
}
got_it:
err = encrypt_one_page(fio);
if (err)
goto out_writepage;
@ -1375,7 +1386,7 @@ int do_write_data_page(struct f2fs_io_info *fio)
* If current allocation needs SSR,
* it had better in-place writes for updated data.
*/
if (need_inplace_update(fio)) {
if (ipu_force || need_inplace_update(fio)) {
f2fs_bug_on(fio->sbi, !fio->cp_rwsem_locked);
f2fs_unlock_op(fio->sbi);
fio->cp_rwsem_locked = false;
@ -1412,6 +1423,7 @@ static int __write_data_page(struct page *page, bool *submitted,
.type = DATA,
.op = REQ_OP_WRITE,
.op_flags = wbc_to_write_flags(wbc),
.old_blkaddr = NULL_ADDR,
.page = page,
.encrypted_page = NULL,
.submitted = false,

1
fs/f2fs/gc.c
View File

@ -714,6 +714,7 @@ static void move_data_page(struct inode *inode, block_t bidx, int gc_type,
.type = DATA,
.op = REQ_OP_WRITE,
.op_flags = REQ_SYNC,
.old_blkaddr = NULL_ADDR,
.page = page,
.encrypted_page = NULL,
};

1
fs/f2fs/segment.c
View File

@ -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);