Hi Matt,
Yes, you are right.
Since the patch is already merged in, I am going to make a separated
patch for that.
thanks,
wengang
在 2015年12月12日 04:28, Matthew Finlay 写道:
Hi Wengang,
I was going through your patch set here, and it seems that you missed changing kfree to kvfree in mlx4_ib_destroy_srq(). In the current code if the srq wrid is allocated using vmalloc, then on cleanup we will use kfree, which is a bug.
Thanks,
-matt
On 10/7/15, 10:27 PM, "linux-rdma-owner@xxxxxxxxxxxxxxx on behalf of Wengang Wang" <linux-rdma-owner@xxxxxxxxxxxxxxx on behalf of wen.gang.wang@xxxxxxxxxx> wrote:
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.wang@xxxxxxxxxx>
Acked-by: Or Gerlitz <ogerlitz@xxxxxxxxxxxx>
---
drivers/infiniband/hw/mlx4/qp.c | 19 +++++++++++++------
drivers/infiniband/hw/mlx4/srq.c | 11 ++++++++---
2 files changed, 21 insertions(+), 9 deletions(-)
diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c
index 4ad9be3..3ccbd3a 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 +881,8 @@ 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);
+ kvfree(qp->sq.wrid);
+ kvfree(qp->rq.wrid);
}
err_mtt:
@@ -1050,8 +1057,8 @@ 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);
+ kvfree(qp->sq.wrid);
+ kvfree(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..8d133c4 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 +209,7 @@ err_wrid:
if (pd->uobject)
mlx4_ib_db_unmap_user(to_mucontext(pd->uobject->context), &srq->db);
else
- kfree(srq->wrid);
+ kvfree(srq->wrid);
err_mtt:
mlx4_mtt_cleanup(dev->dev, &srq->mtt);
--
2.1.0
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