From: Sagi Grimberg <sagi@grimberg.me>
Date: Wed, 27 Jun 2018 11:03:45 +0300
Subject: IB/iser: set can_queue earlier to allow setting higher queue depth
Patch-mainline: v4.19-rc1
Git-commit: 68348441ef7d15e6a902c956e139723c99e065ed
References: bsc#1103992 FATE#326009
We need to set can_queue earlier than when enabling the scsi host.
in a blk-mq enabled environment, the tagset allocation is taken
from can_queue which cannot be modified later. Also, pass an updated
.can_queue to iscsi_session_setup to have enough iscsi tasks allocated
in the session kfifo.
Reported-by: Karandeep Chahal <karandeepchahal@gmail.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/infiniband/ulp/iser/iscsi_iser.c | 12 +++---------
1 file changed, 3 insertions(+), 9 deletions(-)
--- a/drivers/infiniband/ulp/iser/iscsi_iser.c
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.c
@@ -633,8 +633,8 @@ iscsi_iser_session_create(struct iscsi_e
*/
if (ep) {
iser_conn = ep->dd_data;
- max_cmds = iser_conn->max_cmds;
shost->sg_tablesize = iser_conn->scsi_sg_tablesize;
+ shost->can_queue = min_t(u16, cmds_max, iser_conn->max_cmds);
mutex_lock(&iser_conn->state_mutex);
if (iser_conn->state != ISER_CONN_UP) {
@@ -660,6 +660,7 @@ iscsi_iser_session_create(struct iscsi_e
}
mutex_unlock(&iser_conn->state_mutex);
} else {
+ shost->can_queue = min_t(u16, cmds_max, ISER_DEF_XMIT_CMDS_MAX);
max_cmds = ISER_DEF_XMIT_CMDS_MAX;
if (iscsi_host_add(shost, NULL))
goto free_host;
@@ -676,21 +677,14 @@ iscsi_iser_session_create(struct iscsi_e
iser_warn("max_sectors was reduced from %u to %u\n",
iser_max_sectors, shost->max_sectors);
- if (cmds_max > max_cmds) {
- iser_info("cmds_max changed from %u to %u\n",
- cmds_max, max_cmds);
- cmds_max = max_cmds;
- }
-
cls_session = iscsi_session_setup(&iscsi_iser_transport, shost,
- cmds_max, 0,
+ shost->can_queue, 0,
sizeof(struct iscsi_iser_task),
initial_cmdsn, 0);
if (!cls_session)
goto remove_host;
session = cls_session->dd_data;
- shost->can_queue = session->scsi_cmds_max;
return cls_session;
remove_host: