nr_write_queues specifies the number of additional queues that
will be connected. These queues will host write I/O (host to target
payload) while nr_io_queues will host read I/O (target to host payload).
Signed-off-by: Sagi Grimberg <sagi@xxxxxxxxxxx>
---
Documentation/nvme-connect.txt | 5 +++++
fabrics.c | 11 +++++++++++
2 files changed, 16 insertions(+)
diff --git a/Documentation/nvme-connect.txt b/Documentation/nvme-connect.txt
index af78b2a8238f..d4a0e6678475 100644
--- a/Documentation/nvme-connect.txt
+++ b/Documentation/nvme-connect.txt
@@ -16,6 +16,7 @@ SYNOPSIS
[--host-traddr=<traddr> | -w <traddr>]
[--hostnqn=<hostnqn> | -q <hostnqn>]
[--nr-io-queues=<#> | -i <#>]
+ [--nr-write-queues=<#> | -W <#>]
[--queue-size=<#> | -Q <#>]
[--keep-alive-tmo=<#> | -k <#>]
[--reconnect-delay=<#> | -c <#>]
@@ -75,6 +76,10 @@ OPTIONS
--nr-io-queues=<#>::
Overrides the default number of I/O queues create by the driver.
+-W <#>::
+--nr-write-queues=<#>::
+ Adds additional queues that will be used for write I/O.
+
-Q <#>::
--queue-size=<#>::
Overrides the default number of elements in the I/O queues created
diff --git a/fabrics.c b/fabrics.c
index 93f3410a1c72..bc6a0b7e4e21 100644
--- a/fabrics.c
+++ b/fabrics.c
@@ -53,6 +53,7 @@ static struct config {
char *hostnqn;
char *hostid;
int nr_io_queues;
+ int nr_write_queues;
int queue_size;
int keep_alive_tmo;
int reconnect_delay;
@@ -621,6 +622,8 @@ static int build_options(char *argstr, int max_len)
add_argument(&argstr, &max_len, "hostid", cfg.hostid)) ||
add_int_argument(&argstr, &max_len, "nr_io_queues",
cfg.nr_io_queues) ||
+ add_int_argument(&argstr, &max_len, "nr_write_queues",
+ cfg.nr_write_queues) ||
add_int_argument(&argstr, &max_len, "queue_size", cfg.queue_size) ||
add_int_argument(&argstr, &max_len, "keep_alive_tmo",
cfg.keep_alive_tmo) ||
@@ -694,6 +697,13 @@ retry:
p += len;
}
+ if (cfg.nr_write_queues) {
+ len = sprintf(p, ",nr_write_queues=%d", cfg.nr_write_queues);
+ if (len < 0)
+ return -EINVAL;
+ p += len;
+ }
+
if (cfg.host_traddr) {
len = sprintf(p, ",host_traddr=%s", cfg.host_traddr);
if (len < 0)
@@ -1009,6 +1019,7 @@ int connect(const char *desc, int argc, char **argv)
{"hostnqn", 'q', "LIST", CFG_STRING, &cfg.hostnqn, required_argument, "user-defined hostnqn" },
{"hostid", 'I', "LIST", CFG_STRING, &cfg.hostid, required_argument, "user-defined hostid (if default not used)"},
{"nr-io-queues", 'i', "LIST", CFG_INT, &cfg.nr_io_queues, required_argument, "number of io queues to use (default is core count)" },
+ {"nr-write-queues", 'W', "LIST", CFG_INT, &cfg.nr_write_queues, required_argument, "number of write queues to use (default 0)" },
{"queue-size", 'Q', "LIST", CFG_INT, &cfg.queue_size, required_argument, "number of io queue elements to use (default 128)" },
{"keep-alive-tmo", 'k', "LIST", CFG_INT, &cfg.keep_alive_tmo, required_argument, "keep alive timeout period in seconds" },
{"reconnect-delay", 'c', "LIST", CFG_INT, &cfg.reconnect_delay, required_argument, "reconnect timeout period in seconds" },
--
2.17.1
