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io_uring: run next sqe inline if possible 

One major use case of linked commands is the ability to run the next
link inline, if at all possible. This is done correctly for async
offload, but somewhere along the line we lost the ability to do so when
we were able to complete a request without having to punt it. Ensure
that we do so correctly.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
alistair/sunxi64-5.5-dsi
Jens Axboe 2019-12-09 20:01:01 -07:00
parent 392edb45b2
commit 4a0a7a1874
1 changed files with 11 additions and 4 deletions
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15
fs/io_uring.c
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@ -3224,13 +3224,14 @@ static struct io_kiocb *io_prep_linked_timeout(struct io_kiocb *req)
static void __io_queue_sqe(struct io_kiocb *req)
{
struct io_kiocb *linked_timeout = io_prep_linked_timeout(req);
struct io_kiocb *linked_timeout;
struct io_kiocb *nxt = NULL;
int ret;
again:
linked_timeout = io_prep_linked_timeout(req);
ret = io_issue_sqe(req, &nxt, true);
if (nxt)
io_queue_async_work(nxt);
/*
* We async punt it if the file wasn't marked NOWAIT, or if the file
@ -3249,7 +3250,7 @@ static void __io_queue_sqe(struct io_kiocb *req)
* submit reference when the iocb is actually submitted.
*/
io_queue_async_work(req);
return;
goto done_req;
}
err:
@ -3269,6 +3270,12 @@ err:
req_set_fail_links(req);
io_put_req(req);
}
done_req:
if (nxt) {
req = nxt;
nxt = NULL;
goto again;
}
}
static void io_queue_sqe(struct io_kiocb *req)