RDMA/rtrs-clt: Raise MAX_SEGMENTS

As we can do fast memory registration on write, we can increase
the max_segments, default to 512K.

Link: https://lore.kernel.org/r/20210621055340.11789-5-jinpu.wang@ionos.com
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Reviewed-by: Md Haris Iqbal <haris.iqbal@cloud.ionos.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt.c b/drivers/infiniband/ulp/rtrs/rtrs-clt.c
index 37fc0f203980ae3d2401f30819a54bcaa712068a..75b6b14afd37a4167ff12a1e3efd70436ff905af 100644 (file)
--- a/drivers/infiniband/ulp/rtrs/rtrs-clt.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs-clt.c
@@ -32,6 +32,8 @@
 #define RTRS_RECONNECT_SEED 8
 
 #define FIRST_CONN 0x01
+/* limit to 128 * 4k = 512k max IO */
+#define RTRS_MAX_SEGMENTS          128
 
 MODULE_DESCRIPTION("RDMA Transport Client");
 MODULE_LICENSE("GPL");
@@ -1545,7 +1547,7 @@ static struct rtrs_clt_sess *alloc_sess(struct rtrs_clt *clt,
                       rdma_addr_size((struct sockaddr *)path->src));
        strscpy(sess->s.sessname, clt->sessname, sizeof(sess->s.sessname));
        sess->clt = clt;
-       sess->max_pages_per_mr = max_segments;
+       sess->max_pages_per_mr = RTRS_MAX_SEGMENTS;
        init_waitqueue_head(&sess->state_wq);
        sess->state = RTRS_CLT_CONNECTING;
        atomic_set(&sess->connected_cnt, 0);
@@ -2695,7 +2697,7 @@ static struct rtrs_clt *alloc_clt(const char *sessname, size_t paths_num,
        clt->paths_up = MAX_PATHS_NUM;
        clt->port = port;
        clt->pdu_sz = pdu_sz;
-       clt->max_segments = max_segments;
+       clt->max_segments = RTRS_MAX_SEGMENTS;
        clt->reconnect_delay_sec = reconnect_delay_sec;
        clt->max_reconnect_attempts = max_reconnect_attempts;
        clt->priv = priv;