From b588300801f3502a7de5ca897af68019fbb3bc79 Mon Sep 17 00:00:00 2001 From: Li Dongyang Date: Wed, 16 Aug 2017 23:31:22 +1000 Subject: [PATCH] IB/mlx5: use kvmalloc_array for mlx5_ib_wq We observed multiple times on our Lustre OSS servers that when the system memory is fragmented, kmalloc() in create_kernel_qp() could fail order 4/5 allocations while we still have many free pages. Switch to kvmalloc_array() to allow the operation to contine. Signed-off-by: Li Dongyang Acked-by: Leon Romanovsky Signed-off-by: Doug Ledford --- drivers/infiniband/hw/mlx5/qp.c | 35 ++++++++++++++++++-------------- drivers/infiniband/hw/mlx5/srq.c | 4 ++-- 2 files changed, 22 insertions(+), 17 deletions(-) diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c index 5c7ce9bd466e..e098c97e027a 100644 --- a/drivers/infiniband/hw/mlx5/qp.c +++ b/drivers/infiniband/hw/mlx5/qp.c @@ -965,11 +965,16 @@ static int create_kernel_qp(struct mlx5_ib_dev *dev, goto err_free; } - qp->sq.wrid = kmalloc(qp->sq.wqe_cnt * sizeof(*qp->sq.wrid), GFP_KERNEL); - qp->sq.wr_data = kmalloc(qp->sq.wqe_cnt * sizeof(*qp->sq.wr_data), GFP_KERNEL); - qp->rq.wrid = kmalloc(qp->rq.wqe_cnt * sizeof(*qp->rq.wrid), GFP_KERNEL); - qp->sq.w_list = kmalloc(qp->sq.wqe_cnt * sizeof(*qp->sq.w_list), GFP_KERNEL); - qp->sq.wqe_head = kmalloc(qp->sq.wqe_cnt * sizeof(*qp->sq.wqe_head), GFP_KERNEL); + qp->sq.wrid = kvmalloc_array(qp->sq.wqe_cnt, + sizeof(*qp->sq.wrid), GFP_KERNEL); + qp->sq.wr_data = kvmalloc_array(qp->sq.wqe_cnt, + sizeof(*qp->sq.wr_data), GFP_KERNEL); + qp->rq.wrid = kvmalloc_array(qp->rq.wqe_cnt, + sizeof(*qp->rq.wrid), GFP_KERNEL); + qp->sq.w_list = kvmalloc_array(qp->sq.wqe_cnt, + sizeof(*qp->sq.w_list), GFP_KERNEL); + qp->sq.wqe_head = kvmalloc_array(qp->sq.wqe_cnt, + sizeof(*qp->sq.wqe_head), GFP_KERNEL); if (!qp->sq.wrid || !qp->sq.wr_data || !qp->rq.wrid || !qp->sq.w_list || !qp->sq.wqe_head) { @@ -981,11 +986,11 @@ static int create_kernel_qp(struct mlx5_ib_dev *dev, return 0; err_wrid: - kfree(qp->sq.wqe_head); - kfree(qp->sq.w_list); - kfree(qp->sq.wrid); - kfree(qp->sq.wr_data); - kfree(qp->rq.wrid); + kvfree(qp->sq.wqe_head); + kvfree(qp->sq.w_list); + kvfree(qp->sq.wrid); + kvfree(qp->sq.wr_data); + kvfree(qp->rq.wrid); mlx5_db_free(dev->mdev, &qp->db); err_free: @@ -998,11 +1003,11 @@ static int create_kernel_qp(struct mlx5_ib_dev *dev, static void destroy_qp_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp) { - kfree(qp->sq.wqe_head); - kfree(qp->sq.w_list); - kfree(qp->sq.wrid); - kfree(qp->sq.wr_data); - kfree(qp->rq.wrid); + kvfree(qp->sq.wqe_head); + kvfree(qp->sq.w_list); + kvfree(qp->sq.wrid); + kvfree(qp->sq.wr_data); + kvfree(qp->rq.wrid); mlx5_db_free(dev->mdev, &qp->db); mlx5_buf_free(dev->mdev, &qp->buf); } diff --git a/drivers/infiniband/hw/mlx5/srq.c b/drivers/infiniband/hw/mlx5/srq.c index 43707b101f47..30b3ddd8e1ab 100644 --- a/drivers/infiniband/hw/mlx5/srq.c +++ b/drivers/infiniband/hw/mlx5/srq.c @@ -196,7 +196,7 @@ static int create_srq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_srq *srq, } mlx5_fill_page_array(&srq->buf, in->pas); - srq->wrid = kmalloc(srq->msrq.max * sizeof(u64), GFP_KERNEL); + srq->wrid = kvmalloc_array(srq->msrq.max, sizeof(u64), GFP_KERNEL); if (!srq->wrid) { err = -ENOMEM; goto err_in; @@ -230,7 +230,7 @@ static void destroy_srq_user(struct ib_pd *pd, struct mlx5_ib_srq *srq) static void destroy_srq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_srq *srq) { - kfree(srq->wrid); + kvfree(srq->wrid); mlx5_buf_free(dev->mdev, &srq->buf); mlx5_db_free(dev->mdev, &srq->db); } -- 2.45.2