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io_uring: move inflight un-tracking into cleanup 

REQ_F_INFLIGHT deaccounting doesn't do any spinlocking or resource
freeing anymore, so it's safe to move it into the normal cleanup flow,
i.e. into io_clean_op(), so making it cleaner.

Also move io_req_needs_clean() to be first in io_dismantle_req() so it
doesn't reload req->flags.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/90653a3a5de4107e3a00536fa4c2ea5f2c38a4ac.1618916549.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2021-04-20 12:03:31 +01:00 committed by Jens Axboe
parent eb37267229
commit 3a0a690235
1 changed files with 9 additions and 10 deletions
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19
fs/io_uring.c
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@ -1601,7 +1601,7 @@ static void io_req_complete_post(struct io_kiocb *req, long res,
static inline bool io_req_needs_clean(struct io_kiocb *req)
{
return req->flags & (REQ_F_BUFFER_SELECTED | REQ_F_NEED_CLEANUP |
REQ_F_POLLED);
REQ_F_POLLED | REQ_F_INFLIGHT);
}
static void io_req_complete_state(struct io_kiocb *req, long res,
@ -1717,17 +1717,10 @@ static void io_dismantle_req(struct io_kiocb *req)
{
unsigned int flags = req->flags;
if (io_req_needs_clean(req))
io_clean_op(req);
if (!(flags & REQ_F_FIXED_FILE))
io_put_file(req->file);
if (io_req_needs_clean(req) || (req->flags & REQ_F_INFLIGHT)) {
io_clean_op(req);
if (req->flags & REQ_F_INFLIGHT) {
struct io_uring_task *tctx = req->task->io_uring;
atomic_dec(&tctx->inflight_tracked);
req->flags &= ~REQ_F_INFLIGHT;
}
}
if (req->fixed_rsrc_refs)
percpu_ref_put(req->fixed_rsrc_refs);
if (req->async_data)
@ -6057,6 +6050,12 @@ static void io_clean_op(struct io_kiocb *req)
kfree(req->apoll);
req->apoll = NULL;
}
if (req->flags & REQ_F_INFLIGHT) {
struct io_uring_task *tctx = req->task->io_uring;
atomic_dec(&tctx->inflight_tracked);
req->flags &= ~REQ_F_INFLIGHT;
}
}
static int io_issue_sqe(struct io_kiocb *req, unsigned int issue_flags)