Hi Yunlong, It looks there is no way to create discard thread redundantly, so here we don't need to check this? Thanks, On 2017/7/6 19:05, Yunlong Song wrote: > Signed-off-by: Yunlong Song <yunlong.song@xxxxxxxxxx> > --- > fs/f2fs/segment.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c > index 4c246e3..b48d004 100644 > --- a/fs/f2fs/segment.c > +++ b/fs/f2fs/segment.c > @@ -1417,6 +1417,8 @@ static int create_discard_cmd_control(struct f2fs_sb_info *sbi) > > if (SM_I(sbi)->dcc_info) { > dcc = SM_I(sbi)->dcc_info; > + if (dcc->f2fs_issue_discard) > + return err; > goto init_thread; > } > >