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RDMA/rtrs: Update comments for MAX_SESS_QUEUE_DEPTH

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

Signed-off-by: Guoqing Jiang <guoqing.jiang@linux.dev>
Link: https://lore.kernel.org/r/20220902101922.26273-2-guoqing.jiang@linux.dev
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Guoqing Jiang
2022-09-02 18:19:20 +08:00
committed by Leon Romanovsky
parent e58f889e29
commit 2aa9e4a2c3
1 changed files with 3 additions and 4 deletions
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7
drivers/infiniband/ulp/rtrs/rtrs-pri.h
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@@ -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