membuf size is the max size of one rdma buffer used.
The default is still 512 as was but a user can now change it
to 1024 for example to be able to use bigger block sizes.
Signed-off-by: Roi Dayan <roid@xxxxxxxxxxxx>
---
usr/iscsi/iser.c | 15 +++++++++++----
1 files changed, 11 insertions(+), 4 deletions(-)
diff --git a/usr/iscsi/iser.c b/usr/iscsi/iser.c
index d748184..35c6faa 100644
--- a/usr/iscsi/iser.c
+++ b/usr/iscsi/iser.c
@@ -76,7 +76,7 @@ char *iser_portal_addr;
*/
#define MAX_WQE 1800
-#define RDMA_TRANSFER_SIZE (512 * 1024)
+#define DEFAULT_RDMA_TRANSFER_SIZE (512 * 1024)
#define MAX_POLL_WC 32
@@ -97,7 +97,7 @@ static size_t buf_pool_sz_mb = DEFAULT_POOL_SIZE_MB;
static int cq_vector = -1;
static int membuf_num;
-static size_t membuf_size = RDMA_TRANSFER_SIZE;
+static size_t membuf_size = DEFAULT_RDMA_TRANSFER_SIZE;
static int iser_conn_get(struct iser_conn *conn);
static int iser_conn_getn(struct iser_conn *conn, int n);
@@ -1166,8 +1166,7 @@ int iser_login_complete(struct iscsi_connection *iscsi_conn)
/* How much data to grab in an RDMA operation, read or write */
/* ToDo: fix iscsi login code, broken handling of MAX_XMIT_DL */
- iscsi_conn->session_param[ISCSI_PARAM_MAX_XMIT_DLENGTH].val =
- RDMA_TRANSFER_SIZE;
+ iscsi_conn->session_param[ISCSI_PARAM_MAX_XMIT_DLENGTH].val = membuf_size;
out:
return err;
}
@@ -3492,6 +3491,7 @@ static const char *lld_param_nop = "nop";
static const char *lld_param_on = "on";
static const char *lld_param_off = "off";
static const char *lld_param_pool_sz_mb = "pool_sz_mb";
+static const char *lld_param_buf_sz_kb = "buf_sz_kb";
static const char *lld_param_cq_vector = "cq_vector";
static int iser_param_parser(char *p)
@@ -3531,6 +3531,13 @@ static int iser_param_parser(char *p)
buf_pool_sz_mb = atoi(q);
if (buf_pool_sz_mb < 128)
buf_pool_sz_mb = 128;
+ } else if (!strncmp(p, lld_param_buf_sz_kb,
+ strlen(lld_param_buf_sz_kb))) {
+ q = p + strlen(lld_param_buf_sz_kb) + 1;
+ membuf_size = atoi(q);
+ if (membuf_size < 1)
+ membuf_size = 1;
+ membuf_size = membuf_size * 1024;
} else if (!strncmp(p, lld_param_cq_vector,
strlen(lld_param_cq_vector))) {
q = p + strlen(lld_param_cq_vector) + 1;
--
1.7.1
--
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