5.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Hyunchul Lee hyc.lee@gmail.com
[ Upstream commit c9f189271cff85d5d735e25dfa4bc95952ec12d8 ]
Create a memory region pool because rdma_rw_ctx_init() uses memory registration if memory registration yields better performance than using multiple SGE entries.
Acked-by: Namjae Jeon linkinjeon@kernel.org Signed-off-by: Hyunchul Lee hyc.lee@gmail.com Signed-off-by: Steve French stfrench@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/ksmbd/transport_rdma.c | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-)
--- a/fs/ksmbd/transport_rdma.c +++ b/fs/ksmbd/transport_rdma.c @@ -434,6 +434,7 @@ static void free_transport(struct smb_di
if (t->qp) { ib_drain_qp(t->qp); + ib_mr_pool_destroy(t->qp, &t->qp->rdma_mrs); ib_destroy_qp(t->qp); }
@@ -1714,7 +1715,9 @@ static int smb_direct_init_params(struct cap->max_send_sge = SMB_DIRECT_MAX_SEND_SGES; cap->max_recv_sge = SMB_DIRECT_MAX_RECV_SGES; cap->max_inline_data = 0; - cap->max_rdma_ctxs = 0; + cap->max_rdma_ctxs = + rdma_rw_mr_factor(device, t->cm_id->port_num, max_pages) * + smb_direct_max_outstanding_rw_ops; return 0; }
@@ -1796,6 +1799,7 @@ static int smb_direct_create_qpair(struc { int ret; struct ib_qp_init_attr qp_attr; + int pages_per_rw;
t->pd = ib_alloc_pd(t->cm_id->device, 0); if (IS_ERR(t->pd)) { @@ -1843,6 +1847,23 @@ static int smb_direct_create_qpair(struc t->qp = t->cm_id->qp; t->cm_id->event_handler = smb_direct_cm_handler;
+ pages_per_rw = DIV_ROUND_UP(t->max_rdma_rw_size, PAGE_SIZE) + 1; + if (pages_per_rw > t->cm_id->device->attrs.max_sgl_rd) { + int pages_per_mr, mr_count; + + pages_per_mr = min_t(int, pages_per_rw, + t->cm_id->device->attrs.max_fast_reg_page_list_len); + mr_count = DIV_ROUND_UP(pages_per_rw, pages_per_mr) * + atomic_read(&t->rw_avail_ops); + ret = ib_mr_pool_init(t->qp, &t->qp->rdma_mrs, mr_count, + IB_MR_TYPE_MEM_REG, pages_per_mr, 0); + if (ret) { + pr_err("failed to init mr pool count %d pages %d\n", + mr_count, pages_per_mr); + goto err; + } + } + return 0; err: if (t->qp) {