On 3/10/20 9:04 AM, Jens Axboe wrote:
> +static int io_provide_buffers(struct io_kiocb *req, bool force_nonblock)
> +{
> + struct io_provide_buf *p = &req->pbuf;
> + struct io_ring_ctx *ctx = req->ctx;
> + struct io_buffer *head, *list;
> + int ret = 0;
> +
> + /*
> + * "Normal" inline submissions always hold the uring_lock, since we
> + * grab it from the system call. Same is true for the SQPOLL offload.
> + * The only exception is when we've detached the request and issue it
> + * from an async worker thread, grab the lock for that case.
> + */
> + if (!force_nonblock)
> + mutex_lock(&ctx->uring_lock);
I mistakenly introduced io_ring_submit_lock() in patch 3 instead of this
one, I've corrected this mistake in the git branch.
--
Jens Axboe
