[dpdk-dev] [PATCH 1/2] net/mlx4: fix mem leak when a device configured repeatedly

[dpdk-dev] [PATCH 1/2] net/mlx4: fix mem leak when a device configured repeatedly

[wangyunjian]

From: Yunjian Wang <wangyunjian@huawei.com>

Currently, configuring a mlx device, it will allocate its
own process private in mlx5_proc_priv_init() and only frees
it when closing the device. This will lead to a memory leak,
when a device is configured repeatedly.

For example:
for(...)
do
	rte_eth_dev_configure
	rte_eth_rx_queue_setup
	rte_eth_tx_queue_setup
	rte_eth_dev_start
	rte_eth_dev_stop
done

Fixes: 97d37d2c1f6b ("net/mlx4: remove device register remap")
Cc: stable@dpdk.org

Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
---
 drivers/net/mlx4/mlx4.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/mlx4/mlx4.c b/drivers/net/mlx4/mlx4.c
index 7cd35cd3ca..c72587b7ef 100644
--- a/drivers/net/mlx4/mlx4.c
+++ b/drivers/net/mlx4/mlx4.c
@@ -201,6 +201,8 @@ mlx4_proc_priv_init(struct rte_eth_dev *dev)
 	struct mlx4_proc_priv *ppriv;
 	size_t ppriv_size;
 
+	mlx4_proc_priv_uninit(dev);
+
 	/*
 	 * UAR register table follows the process private structure. BlueFlame
 	 * registers for Tx queues are stored in the table.
-- 
2.23.0

Re: [dpdk-dev] [PATCH 1/2] net/mlx4: fix mem leak when a device configured repeatedly

[Slava Ovsiienko]

Hi, Yunjian

Nice and tiny fix, thank you!
Could you, please, remove the empty line after mlx4/5_proc_priv_uninit(dev) 
to follow the mlx5 coding style?

With best regards,
Slava

> -----Original Message-----
> From: wangyunjian <wangyunjian@huawei.com>
> Sent: Wednesday, May 12, 2021 16:18
> To: dev@dpdk.org
> Cc: Matan Azrad <matan@nvidia.com>; Shahaf Shuler
> <shahafs@nvidia.com>; Slava Ovsiienko <viacheslavo@nvidia.com>;
> dingxiaoxiong@huawei.com; Yunjian Wang <wangyunjian@huawei.com>;
> stable@dpdk.org
> Subject: [dpdk-dev] [PATCH 1/2] net/mlx4: fix mem leak when a device
> configured repeatedly
> 
> From: Yunjian Wang <wangyunjian@huawei.com>
> 
> Currently, configuring a mlx device, it will allocate its own process private in
> mlx5_proc_priv_init() and only frees it when closing the device. This will lead
> to a memory leak, when a device is configured repeatedly.
> 
> For example:
> for(...)
> do
> 	rte_eth_dev_configure
> 	rte_eth_rx_queue_setup
> 	rte_eth_tx_queue_setup
> 	rte_eth_dev_start
> 	rte_eth_dev_stop
> done
> 
> Fixes: 97d37d2c1f6b ("net/mlx4: remove device register remap")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
> ---
>  drivers/net/mlx4/mlx4.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/net/mlx4/mlx4.c b/drivers/net/mlx4/mlx4.c index
> 7cd35cd3ca..c72587b7ef 100644
> --- a/drivers/net/mlx4/mlx4.c
> +++ b/drivers/net/mlx4/mlx4.c
> @@ -201,6 +201,8 @@ mlx4_proc_priv_init(struct rte_eth_dev *dev)
>  	struct mlx4_proc_priv *ppriv;
>  	size_t ppriv_size;
> 
> +	mlx4_proc_priv_uninit(dev);
> +
>  	/*
>  	 * UAR register table follows the process private structure. BlueFlame
>  	 * registers for Tx queues are stored in the table.
> --
> 2.23.0

Re: [dpdk-dev] [PATCH 1/2] net/mlx4: fix mem leak when a device configured repeatedly

[wangyunjian]

> -----Original Message-----
> From: Slava Ovsiienko [mailto:viacheslavo@nvidia.com]
> Sent: Wednesday, May 12, 2021 10:05 PM
> To: wangyunjian <wangyunjian@huawei.com>; dev@dpdk.org
> Cc: Matan Azrad <matan@nvidia.com>; Shahaf Shuler <shahafs@nvidia.com>;
> dingxiaoxiong <dingxiaoxiong@huawei.com>; stable@dpdk.org
> Subject: RE: [dpdk-dev] [PATCH 1/2] net/mlx4: fix mem leak when a device
> configured repeatedly
> 
> Hi, Yunjian
> 
> Nice and tiny fix, thank you!
> Could you, please, remove the empty line after mlx4/5_proc_priv_uninit(dev) to
> follow the mlx5 coding style?

OK, I will fix it in next version.

Thanks,
Yunjian

> 
> With best regards,
> Slava
> 
> > -----Original Message-----
> > From: wangyunjian <wangyunjian@huawei.com>
> > Sent: Wednesday, May 12, 2021 16:18
> > To: dev@dpdk.org
> > Cc: Matan Azrad <matan@nvidia.com>; Shahaf Shuler
> > <shahafs@nvidia.com>; Slava Ovsiienko <viacheslavo@nvidia.com>;
> > dingxiaoxiong@huawei.com; Yunjian Wang <wangyunjian@huawei.com>;
> > stable@dpdk.org
> > Subject: [dpdk-dev] [PATCH 1/2] net/mlx4: fix mem leak when a device
> > configured repeatedly
> >
> > From: Yunjian Wang <wangyunjian@huawei.com>
> >
> > Currently, configuring a mlx device, it will allocate its own process
> > private in
> > mlx5_proc_priv_init() and only frees it when closing the device. This
> > will lead to a memory leak, when a device is configured repeatedly.
> >
> > For example:
> > for(...)
> > do
> > 	rte_eth_dev_configure
> > 	rte_eth_rx_queue_setup
> > 	rte_eth_tx_queue_setup
> > 	rte_eth_dev_start
> > 	rte_eth_dev_stop
> > done
> >
> > Fixes: 97d37d2c1f6b ("net/mlx4: remove device register remap")
> > Cc: stable@dpdk.org
> >
> > Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
> > ---
> >  drivers/net/mlx4/mlx4.c | 2 ++
> >  1 file changed, 2 insertions(+)
> >
> > diff --git a/drivers/net/mlx4/mlx4.c b/drivers/net/mlx4/mlx4.c index
> > 7cd35cd3ca..c72587b7ef 100644
> > --- a/drivers/net/mlx4/mlx4.c
> > +++ b/drivers/net/mlx4/mlx4.c
> > @@ -201,6 +201,8 @@ mlx4_proc_priv_init(struct rte_eth_dev *dev)
> >  	struct mlx4_proc_priv *ppriv;
> >  	size_t ppriv_size;
> >
> > +	mlx4_proc_priv_uninit(dev);
> > +
> >  	/*
> >  	 * UAR register table follows the process private structure. BlueFlame
> >  	 * registers for Tx queues are stored in the table.
> > --
> > 2.23.0