Commit 2aa9e4a2 authored by Guoqing Jiang's avatar Guoqing Jiang Committed by Leon Romanovsky
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RDMA/rtrs: Update comments for MAX_SESS_QUEUE_DEPTH 



The maximum queue_depth should be 65535 per check_module_params,
also update other relevant comments.

Signed-off-by: default avatarGuoqing Jiang <guoqing.jiang@linux.dev>
Link: https://lore.kernel.org/r/20220902101922.26273-2-guoqing.jiang@linux.dev


Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
parent e58f889e

drivers/infiniband/ulp/rtrs/rtrs-pri.h

+3 −4
Original line number Diff line number Diff line
@@ -26,11 +26,10 @@ 
/*

 * Max IB immediate data size is 2^28 (MAX_IMM_PAYL_BITS)

 * and the minimum chunk size is 4096 (2^12).

 * So the maximum sess_queue_depth is 65536 (2^16) in theory.

 * But mempool_create, create_qp and ib_post_send fail with

 * "cannot allocate memory" error if sess_queue_depth is too big.

 * So the maximum sess_queue_depth is 65535 (2^16 - 1) in theory

 * since queue_depth in rtrs_msg_conn_rsp is defined as le16.

 * Therefore the pratical max value of sess_queue_depth is

 * somewhere between 1 and 65534 and it depends on the system.

 * somewhere between 1 and 65535 and it depends on the system.

 */

#define MAX_SESS_QUEUE_DEPTH 65535