leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

io_uring: optimise initial ltimeout refcounting

Browse Source 
Linked timeouts are never refcounted when it comes to the first call to
__io_prep_linked_timeout(), so save an io_ref_get() and set the desired
value directly.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/177b24cc62ffbb42d915d6eb9e8876266e4c0d5a.1628981736.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2021-08-15 10:40:20 +01:00 committed by Jens Axboe
parent 761bcac157
commit fb6820998f
1 changed files with 1 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
fs/io_uring.c
View File

@ -1312,8 +1312,7 @@ static struct io_kiocb *__io_prep_linked_timeout(struct io_kiocb *req)
/* linked timeouts should have two refs once prep'ed */
io_req_set_refcount(req);
io_req_set_refcount(nxt);
req_ref_get(nxt);
__io_req_set_refcount(nxt, 2);
nxt->timeout.head = req;
nxt->flags |= REQ_F_LTIMEOUT_ACTIVE;