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| author | Max Gurtovoy <maxg@mellanox.com> | 2017-01-18 00:40:39 +0200 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2017-01-24 11:37:45 -0500 |
| commit | 1e5db6c31ade4150c2e2b1a21e39f776c38fea39 (patch) | |
| tree | badaf77660460ad816aec11c42dc6e96299819d2 /drivers/infiniband/ulp/iser/iscsi_iser.c | |
| parent | 0a475ef4226e305bdcffe12b401ca1eab06c4913 (diff) | |
| download | linux-1e5db6c31ade4150c2e2b1a21e39f776c38fea39.tar.gz linux-1e5db6c31ade4150c2e2b1a21e39f776c38fea39.tar.bz2 linux-1e5db6c31ade4150c2e2b1a21e39f776c38fea39.zip | |
IB/iser: Fix sg_tablesize calculation
For devices that can register page list that is bigger than
USHRT_MAX, we actually take the wrong value for sg_tablesize.
E.g: for CX4 max_fast_reg_page_list_len is 65536 (bigger than USHRT_MAX)
so we set sg_tablesize to 0 by mistake. Therefore, each IO that is
bigger than 4k splitted to "< 4k" chunks that cause performance degredation.
Remove wrong sg_tablesize assignment, and use the value that was set during
address resolution handler with the needed casting.
Cc: <stable@vger.kernel.org> # v4.5+
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/ulp/iser/iscsi_iser.c')
| -rw-r--r-- | drivers/infiniband/ulp/iser/iscsi_iser.c | 7 |
1 files changed, 0 insertions, 7 deletions
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.c b/drivers/infiniband/ulp/iser/iscsi_iser.c index 9104e6b8cac9..1c911876556e 100644 --- a/drivers/infiniband/ulp/iser/iscsi_iser.c +++ b/drivers/infiniband/ulp/iser/iscsi_iser.c @@ -651,13 +651,6 @@ iscsi_iser_session_create(struct iscsi_endpoint *ep, SHOST_DIX_GUARD_CRC); } - /* - * Limit the sg_tablesize and max_sectors based on the device - * max fastreg page list length. - */ - shost->sg_tablesize = min_t(unsigned short, shost->sg_tablesize, - ib_conn->device->ib_device->attrs.max_fast_reg_page_list_len); - if (iscsi_host_add(shost, ib_conn->device->ib_device->dma_device)) { mutex_unlock(&iser_conn->state_mutex); |