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f2fs: unlock cp_rwsem early for IPU writes

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For IPU writes, there won't be any udpates in dnode page since we
will reuse old block address instead of allocating new one, so we
don't need to lock cp_rwsem during IPU IO submitting.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
This commit is contained in:
Chao Yu
2017-04-18 19:23:39 +08:00
committed by Jaegeuk Kim
parent 73d23680de
commit e818486a9a
2 changed files with 6 additions and 1 deletions
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6
fs/f2fs/data.c
View File

@@ -1355,6 +1355,8 @@ retry_encrypt:
!is_cold_data(page) &&
!IS_ATOMIC_WRITTEN_PAGE(page) &&
need_inplace_update(inode))) {
f2fs_unlock_op(F2FS_I_SB(inode));
fio->cp_rwsem_locked = false;
err = rewrite_data_page(fio);
set_inode_flag(inode, FI_UPDATE_WRITE);
trace_f2fs_do_write_data_page(page, IPU);
@@ -1390,6 +1392,7 @@ static int __write_data_page(struct page *page, bool *submitted,
.page = page,
.encrypted_page = NULL,
.submitted = false,
.cp_rwsem_locked = true,
};
trace_f2fs_writepage(page, DATA);
@@ -1447,7 +1450,8 @@ write:
err = do_write_data_page(&fio);
if (F2FS_I(inode)->last_disk_size < psize)
F2FS_I(inode)->last_disk_size = psize;
f2fs_unlock_op(sbi);
if (fio.cp_rwsem_locked)
f2fs_unlock_op(sbi);
done:
if (err && err != -ENOENT)
goto redirty_out;

1
fs/f2fs/f2fs.h
View File

@@ -860,6 +860,7 @@ struct f2fs_io_info {
struct page *page; /* page to be written */
struct page *encrypted_page; /* encrypted page */
bool submitted; /* indicate IO submission */
bool cp_rwsem_locked; /* indicate cp_rwsem is held */
};
#define is_read_io(rw) ((rw) == READ)