[PATCH v2 1/2] IB/mlx5: use kvmalloc_array for mlx5_ib_wq

[PATCH v2 1/2] IB/mlx5: use kvmalloc_array for mlx5_ib_wq

[Li Dongyang]

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 <dongyang.li-FCV4sgi5zeUQrrorzV6ljw@public.gmane.org>
---
 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 0889ff367c86..07b10a95bffd 100644
--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -959,11 +959,16 @@ 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) {
@@ -975,11 +980,11 @@ 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:
@@ -992,11 +997,11 @@ 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);
 }
-- 
2.14.1

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[PATCH v2 2/2] IB/mlx4: use kvmalloc_array to allocate wrid

[Li Dongyang]

We could use kvmalloc_array instead of the
kmalloc and __vmalloc combination.
After this we don't need to include linux/vmalloc.h

Signed-off-by: Li Dongyang <dongyang.li-FCV4sgi5zeUQrrorzV6ljw@public.gmane.org>
---
 drivers/infiniband/hw/mlx4/qp.c  | 15 ++++-----------
 drivers/infiniband/hw/mlx4/srq.c | 13 ++++---------
 2 files changed, 8 insertions(+), 20 deletions(-)

diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c
index 75c0e6c5dd56..76ae772cfbf9 100644
--- a/drivers/infiniband/hw/mlx4/qp.c
+++ b/drivers/infiniband/hw/mlx4/qp.c
@@ -36,7 +36,6 @@
 #include <net/ip.h>
 #include <linux/slab.h>
 #include <linux/netdevice.h>
-#include <linux/vmalloc.h>
 
 #include <rdma/ib_cache.h>
 #include <rdma/ib_pack.h>
@@ -812,16 +811,10 @@ static int create_qp_common(struct mlx4_ib_dev *dev, struct ib_pd *pd,
 		if (err)
 			goto err_mtt;
 
-		qp->sq.wrid = kmalloc_array(qp->sq.wqe_cnt, sizeof(u64),
-					GFP_KERNEL | __GFP_NOWARN);
-		if (!qp->sq.wrid)
-			qp->sq.wrid = __vmalloc(qp->sq.wqe_cnt * sizeof(u64),
-						GFP_KERNEL, PAGE_KERNEL);
-		qp->rq.wrid = kmalloc_array(qp->rq.wqe_cnt, sizeof(u64),
-					GFP_KERNEL | __GFP_NOWARN);
-		if (!qp->rq.wrid)
-			qp->rq.wrid = __vmalloc(qp->rq.wqe_cnt * sizeof(u64),
-						GFP_KERNEL, PAGE_KERNEL);
+		qp->sq.wrid = kvmalloc_array(qp->sq.wqe_cnt,
+					     sizeof(u64), GFP_KERNEL);
+		qp->rq.wrid = kvmalloc_array(qp->rq.wqe_cnt,
+					     sizeof(u64), GFP_KERNEL);
 		if (!qp->sq.wrid || !qp->rq.wrid) {
 			err = -ENOMEM;
 			goto err_wrid;
diff --git a/drivers/infiniband/hw/mlx4/srq.c b/drivers/infiniband/hw/mlx4/srq.c
index 0facaf5f6d23..dd7a2fce9df4 100644
--- a/drivers/infiniband/hw/mlx4/srq.c
+++ b/drivers/infiniband/hw/mlx4/srq.c
@@ -34,7 +34,6 @@
 #include <linux/mlx4/qp.h>
 #include <linux/mlx4/srq.h>
 #include <linux/slab.h>
-#include <linux/vmalloc.h>
 
 #include "mlx4_ib.h"
 #include <rdma/mlx4-abi.h>
@@ -171,15 +170,11 @@ struct ib_srq *mlx4_ib_create_srq(struct ib_pd *pd,
 		if (err)
 			goto err_mtt;
 
-		srq->wrid = kmalloc_array(srq->msrq.max, sizeof(u64),
-					GFP_KERNEL | __GFP_NOWARN);
+		srq->wrid = kvmalloc_array(srq->msrq.max,
+					   sizeof(u64), GFP_KERNEL);
 		if (!srq->wrid) {
-			srq->wrid = __vmalloc(srq->msrq.max * sizeof(u64),
-					      GFP_KERNEL, PAGE_KERNEL);
-			if (!srq->wrid) {
-				err = -ENOMEM;
-				goto err_mtt;
-			}
+			err = -ENOMEM;
+			goto err_mtt;
 		}
 	}
 
-- 
2.14.1

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Re: [PATCH v2 1/2] IB/mlx5: use kvmalloc_array for mlx5_ib_wq

[Leon Romanovsky]

[-- Attachment #1: Type: text/plain, Size: 685 bytes --]

On Wed, Aug 16, 2017 at 11:31:22PM +1000, Li Dongyang wrote:
> 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 <dongyang.li-FCV4sgi5zeUQrrorzV6ljw@public.gmane.org>
> ---
>  drivers/infiniband/hw/mlx5/qp.c  | 35 ++++++++++++++++++++---------------
>  drivers/infiniband/hw/mlx5/srq.c |  4 ++--
>  2 files changed, 22 insertions(+), 17 deletions(-)
>

Thanks,
Acked-by: Leon Romanovsky <leonro-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>

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Re: [PATCH v2 2/2] IB/mlx4: use kvmalloc_array to allocate wrid

[Leon Romanovsky]

[-- Attachment #1: Type: text/plain, Size: 542 bytes --]

On Wed, Aug 16, 2017 at 11:31:23PM +1000, Li Dongyang wrote:
> We could use kvmalloc_array instead of the
> kmalloc and __vmalloc combination.
> After this we don't need to include linux/vmalloc.h
>
> Signed-off-by: Li Dongyang <dongyang.li-FCV4sgi5zeUQrrorzV6ljw@public.gmane.org>
> ---
>  drivers/infiniband/hw/mlx4/qp.c  | 15 ++++-----------
>  drivers/infiniband/hw/mlx4/srq.c | 13 ++++---------
>  2 files changed, 8 insertions(+), 20 deletions(-)
>

Thanks,
Reviewed-by: Leon Romanovsky <leonro-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>

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Re: [PATCH v2 1/2] IB/mlx5: use kvmalloc_array for mlx5_ib_wq

[Doug Ledford]

On Wed, 2017-08-16 at 23:31 +1000, Li Dongyang wrote:
> 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 <dongyang.li-FCV4sgi5zeUQrrorzV6ljw@public.gmane.org>

Thanks, applied.

-- 
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Re: [PATCH v2 2/2] IB/mlx4: use kvmalloc_array to allocate wrid

[Doug Ledford]

On Wed, 2017-08-16 at 23:31 +1000, Li Dongyang wrote:
> We could use kvmalloc_array instead of the
> kmalloc and __vmalloc combination.
> After this we don't need to include linux/vmalloc.h
> 
> Signed-off-by: Li Dongyang <dongyang.li-FCV4sgi5zeUQrrorzV6ljw@public.gmane.org>

Thanks, applied.

-- 
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    GPG KeyID: B826A3330E572FDD
    Key fingerprint = AE6B 1BDA 122B 23B4 265B  1274 B826 A333 0E57 2FDD

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