diff options
| author | Max Gurtovoy <mgurtovoy@nvidia.com> | 2020-10-19 12:46:28 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2020-10-28 19:00:49 +0300 |
| commit | dae7a75f1f19bffb579daf148f8d8addd2726772 (patch) | |
| tree | 88abfacc9e44684e118525ce51a5c9eea2e4e41b /drivers/infiniband/ulp/isert/ib_isert.h | |
| parent | bb3ab2979fd69db23328691cb10067861df89037 (diff) | |
| download | linux-dae7a75f1f19bffb579daf148f8d8addd2726772.tar.xz | |
IB/isert: add module param to set sg_tablesize for IO cmd
Currently, iser target support max IO size of 16MiB by default. For some
adapters, allocating this amount of resources might reduce the total
number of possible connections that can be created. For those adapters,
it's preferred to reduce the max IO size to be able to create more
connections. Since there is no handshake procedure for max IO size in iser
protocol, set the default max IO size to 1MiB and add a module parameter
for enabling the option to control it for suitable adapters.
Fixes: 317000b926b0 ("IB/isert: allocate RW ctxs according to max IO size")
Link: https://lore.kernel.org/r/20201019094628.17202-1-mgurtovoy@nvidia.com
Reported-by: Krishnamraju Eraparaju <krishna2@chelsio.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband/ulp/isert/ib_isert.h')
| -rw-r--r-- | drivers/infiniband/ulp/isert/ib_isert.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/infiniband/ulp/isert/ib_isert.h b/drivers/infiniband/ulp/isert/ib_isert.h index 7fee4a65e181..6c5af13db4e0 100644 --- a/drivers/infiniband/ulp/isert/ib_isert.h +++ b/drivers/infiniband/ulp/isert/ib_isert.h @@ -65,6 +65,12 @@ */ #define ISER_RX_SIZE (ISCSI_DEF_MAX_RECV_SEG_LEN + 1024) +/* Default I/O size is 1MB */ +#define ISCSI_ISER_DEF_SG_TABLESIZE 256 + +/* Minimum I/O size is 512KB */ +#define ISCSI_ISER_MIN_SG_TABLESIZE 128 + /* Maximum support is 16MB I/O size */ #define ISCSI_ISER_MAX_SG_TABLESIZE 4096 |