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io_uring: properly mark async work as bounded vs unbounded 

Now that io-wq supports separating the two request lifetime types, mark
the following IO as having unbounded runtimes:

- Any read/write to a non-regular file
- Any specific networked IO
- Any poll command

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2019-11-07 10:57:36 -07:00
parent c5def4ab84
commit 5f8fd2d3e0
1 changed files with 15 additions and 1 deletions
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16
fs/io_uring.c
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@ -506,6 +506,20 @@ static inline bool io_prep_async_work(struct io_kiocb *req)
case IORING_OP_WRITEV:
case IORING_OP_WRITE_FIXED:
do_hashed = true;
/* fall-through */
case IORING_OP_READV:
case IORING_OP_READ_FIXED:
case IORING_OP_SENDMSG:
case IORING_OP_RECVMSG:
case IORING_OP_ACCEPT:
case IORING_OP_POLL_ADD:
/*
* We know REQ_F_ISREG is not set on some of these
* opcodes, but this enables us to keep the check in
* just one place.
*/
if (!(req->flags & REQ_F_ISREG))
req->work.flags |= IO_WQ_WORK_UNBOUND;
break;
}
if (io_sqe_needs_user(req->submit.sqe))
@ -3745,7 +3759,7 @@ static int io_sq_offload_start(struct io_ring_ctx *ctx,
/* Do QD, or 4 * CPUS, whatever is smallest */
concurrency = min(ctx->sq_entries, 4 * num_online_cpus());
ctx->io_wq = io_wq_create(concurrency, ctx->sqo_mm, NULL);
ctx->io_wq = io_wq_create(concurrency, ctx->sqo_mm, ctx->user);
if (IS_ERR(ctx->io_wq)) {
ret = PTR_ERR(ctx->io_wq);
ctx->io_wq = NULL;