There are several hits that WR buffer allocation(kmalloc) failed.
It failed at order 3 and/or 4 contigous pages allocation. At the same time
there are actually 100MB+ free memory but well fragmented.
So try vmalloc when kmalloc failed.
Signed-off-by: Wengang Wang <wen.gang.w...@oracle.com>
---
drivers/infiniband/hw/mlx4/qp.c | 34 ++++++++++++++++++++++++++++------
drivers/infiniband/hw/mlx4/srq.c | 14 +++++++++++---
2 files changed, 39 insertions(+), 9 deletions(-)
diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c
index 4ad9be3..da551e1 100644
--- a/drivers/infiniband/hw/mlx4/qp.c
+++ b/drivers/infiniband/hw/mlx4/qp.c
@@ -34,6 +34,7 @@
#include <linux/log2.h>
#include <linux/slab.h>
#include <linux/netdevice.h>
+#include <linux/vmalloc.h>
#include <rdma/ib_cache.h>
#include <rdma/ib_pack.h>
@@ -786,8 +787,14 @@ static int create_qp_common(struct mlx4_ib_dev *dev,
struct ib_pd *pd,
if (err)
goto err_mtt;
- qp->sq.wrid = kmalloc(qp->sq.wqe_cnt * sizeof (u64), gfp);
- qp->rq.wrid = kmalloc(qp->rq.wqe_cnt * sizeof (u64), gfp);
+ qp->sq.wrid = kmalloc(qp->sq.wqe_cnt * sizeof(u64), gfp);
+ if (!qp->sq.wrid)
+ qp->sq.wrid = __vmalloc(qp->sq.wqe_cnt * sizeof(u64),
+ gfp, PAGE_KERNEL);
+ qp->rq.wrid = kmalloc(qp->rq.wqe_cnt * sizeof(u64), gfp);
+ if (!qp->rq.wrid)
+ qp->rq.wrid = __vmalloc(qp->rq.wqe_cnt * sizeof(u64),
+ gfp, PAGE_KERNEL);
if (!qp->sq.wrid || !qp->rq.wrid) {
err = -ENOMEM;
goto err_wrid;
@@ -874,8 +881,15 @@ err_wrid:
if (qp_has_rq(init_attr))
mlx4_ib_db_unmap_user(to_mucontext(pd->uobject->context), &qp->db);
} else {
- kfree(qp->sq.wrid);
- kfree(qp->rq.wrid);
+ if (is_vmalloc_addr(qp->sq.wrid))
+ vfree(qp->sq.wrid);
+ else
+ kfree(qp->sq.wrid);
+
+ if (is_vmalloc_addr(qp->rq.wrid))
+ vfree(qp->rq.wrid);
+ else
+ kfree(qp->rq.wrid);
}
err_mtt:
@@ -1050,8 +1064,16 @@ static void destroy_qp_common(struct mlx4_ib_dev *dev,
struct mlx4_ib_qp *qp,
&qp->db);
ib_umem_release(qp->umem);
} else {
- kfree(qp->sq.wrid);
- kfree(qp->rq.wrid);
+ if (is_vmalloc_addr(qp->sq.wrid))
+ vfree(qp->sq.wrid);
+ else
+ kfree(qp->sq.wrid);
+
+ if (is_vmalloc_addr(qp->rq.wrid))
+ vfree(qp->rq.wrid);
+ else
+ kfree(qp->rq.wrid);
+
if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI))
free_proxy_bufs(&dev->ib_dev, qp);
diff --git a/drivers/infiniband/hw/mlx4/srq.c b/drivers/infiniband/hw/mlx4/srq.c
index dce5dfe..d0e8d40 100644
--- a/drivers/infiniband/hw/mlx4/srq.c
+++ b/drivers/infiniband/hw/mlx4/srq.c
@@ -34,6 +34,7 @@
#include <linux/mlx4/qp.h>
#include <linux/mlx4/srq.h>
#include <linux/slab.h>
+#include <linux/vmalloc.h>
#include "mlx4_ib.h"
#include "user.h"
@@ -172,8 +173,12 @@ struct ib_srq *mlx4_ib_create_srq(struct ib_pd *pd,
srq->wrid = kmalloc(srq->msrq.max * sizeof (u64), GFP_KERNEL);
if (!srq->wrid) {
- err = -ENOMEM;
- goto err_mtt;
+ srq->wrid = __vmalloc(srq->msrq.max * sizeof(u64),
+ GFP_KERNEL, PAGE_KERNEL);
+ if (!srq->wrid) {
+ err = -ENOMEM;
+ goto err_mtt;
+ }
}
}
@@ -204,7 +209,10 @@ err_wrid:
if (pd->uobject)
mlx4_ib_db_unmap_user(to_mucontext(pd->uobject->context),
&srq->db);
else
- kfree(srq->wrid);
+ if (is_vmalloc_addr(srq->wrid))
+ vfree(srq->wrid);
+ else
+ kfree(srq->wrid);
err_mtt:
mlx4_mtt_cleanup(dev->dev, &srq->mtt);
--
2.1.0
--
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