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Code Issues Releases Wiki Activity

io_uring: run regular file completions from task_work

Browse source 
This is in preparation to making the completion lock work outside of
hard/soft IRQ context.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2021-08-10 15:15:25 -06:00
parent 89b263f6d5
commit 8ef12efe26
1 changed files with 24 additions and 7 deletions
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31
fs/io_uring.c
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@ -2482,31 +2482,48 @@ static bool io_rw_should_reissue(struct io_kiocb *req)
}
#endif
static void __io_complete_rw(struct io_kiocb *req, long res, long res2,
unsigned int issue_flags)
static bool __io_complete_rw_common(struct io_kiocb *req, long res)
{
int cflags = 0;
if (req->rw.kiocb.ki_flags & IOCB_WRITE)
kiocb_end_write(req);
if (res != req->result) {
if ((res == -EAGAIN || res == -EOPNOTSUPP) &&
io_rw_should_reissue(req)) {
req->flags |= REQ_F_REISSUE;
return;
return true;
}
req_set_fail(req);
req->result = res;
}
return false;
}
static void io_req_task_complete(struct io_kiocb *req)
{
int cflags = 0;
if (req->flags & REQ_F_BUFFER_SELECTED)
cflags = io_put_rw_kbuf(req);
__io_req_complete(req, issue_flags, res, cflags);
__io_req_complete(req, 0, req->result, cflags);
}
static void __io_complete_rw(struct io_kiocb *req, long res, long res2,
unsigned int issue_flags)
{
if (__io_complete_rw_common(req, res))
return;
io_req_task_complete(req);
}
static void io_complete_rw(struct kiocb *kiocb, long res, long res2)
{
struct io_kiocb *req = container_of(kiocb, struct io_kiocb, rw.kiocb);
__io_complete_rw(req, res, res2, 0);
if (__io_complete_rw_common(req, res))
return;
req->result = res;
req->io_task_work.func = io_req_task_complete;
io_req_task_work_add(req);
}
static void io_complete_rw_iopoll(struct kiocb *kiocb, long res, long res2)