RE: [PATCH] io_uring: use IO_REQ_LINK_FLAGS more

[lizetao <lizetao1@huawei.com>]

Hi,

> -----Original Message-----
> From: Caleb Sander Mateos <csander@purestorage.com>
> Sent: Wednesday, February 12, 2025 4:20 AM
> To: Jens Axboe <axboe@kernel.dk>; Pavel Begunkov <asml.silence@gmail.com>
> Cc: Caleb Sander Mateos <csander@purestorage.com>; io-
> uring@vger.kernel.org; linux-kernel@vger.kernel.org
> Subject: [PATCH] io_uring: use IO_REQ_LINK_FLAGS more
> 
> Replace the 2 instances of REQ_F_LINK | REQ_F_HARDLINK with the more
> commonly used IO_REQ_LINK_FLAGS.
> 
> Signed-off-by: Caleb Sander Mateos <csander@purestorage.com>
> ---
>  io_uring/io_uring.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index
> ec98a0ec6f34..8bb8c099c3e1 100644
> --- a/io_uring/io_uring.c
> +++ b/io_uring/io_uring.c
> @@ -108,15 +108,17 @@
>  			  IOSQE_IO_HARDLINK | IOSQE_ASYNC)
> 
>  #define SQE_VALID_FLAGS	(SQE_COMMON_FLAGS |
> IOSQE_BUFFER_SELECT | \
>  			IOSQE_IO_DRAIN | IOSQE_CQE_SKIP_SUCCESS)
> 
> +#define IO_REQ_LINK_FLAGS (REQ_F_LINK | REQ_F_HARDLINK)
> +
>  #define IO_REQ_CLEAN_FLAGS (REQ_F_BUFFER_SELECTED |
> REQ_F_NEED_CLEANUP | \
>  				REQ_F_POLLED | REQ_F_INFLIGHT |
> REQ_F_CREDS | \
>  				REQ_F_ASYNC_DATA)
> 
> -#define IO_REQ_CLEAN_SLOW_FLAGS (REQ_F_REFCOUNT | REQ_F_LINK |
> REQ_F_HARDLINK |\
> +#define IO_REQ_CLEAN_SLOW_FLAGS (REQ_F_REFCOUNT |
> IO_REQ_LINK_FLAGS | \
>  				 REQ_F_REISSUE | IO_REQ_CLEAN_FLAGS)
> 
>  #define IO_TCTX_REFS_CACHE_NR	(1U << 10)
> 
>  #define IO_COMPL_BATCH			32
> @@ -129,11 +131,10 @@ struct io_defer_entry {
>  	u32			seq;
>  };
> 
>  /* requests with any of those set should undergo io_disarm_next() */  #define
> IO_DISARM_MASK (REQ_F_ARM_LTIMEOUT | REQ_F_LINK_TIMEOUT |
> REQ_F_FAIL) -#define IO_REQ_LINK_FLAGS (REQ_F_LINK | REQ_F_HARDLINK)
> 
>  /*
>   * No waiters. It's larger than any valid value of the tw counter
>   * so that tests against ->cq_wait_nr would fail and skip wake_up().
>   */
> @@ -1155,11 +1156,11 @@ static inline void io_req_local_work_add(struct
> io_kiocb *req,
> 
>  	/*
>  	 * We don't know how many reuqests is there in the link and whether
>  	 * they can even be queued lazily, fall back to non-lazy.
>  	 */
> -	if (req->flags & (REQ_F_LINK | REQ_F_HARDLINK))
> +	if (req->flags & IO_REQ_LINK_FLAGS)
>  		flags &= ~IOU_F_TWQ_LAZY_WAKE;
> 
>  	guard(rcu)();
> 
>  	head = READ_ONCE(ctx->work_llist.first);
> --
> 2.45.2
> 

Reviewed-by: Li Zetao <lizetao1@huawei.com>

---
Li Zetao