Re: [dpdk-dev] [PATCH v2] net/ixgbe: fix resource leak after thread exits normally

["Ananyev, Konstantin" <konstantin.ananyev@intel.com>]

Hi Tao,

> From: Zhu Tao <taox.zhu@intel.com>
> 
> When the thread exits normally, pthread_join() is not called, which can
> result in a resource leak. Therefore, the thread is set to separation
> mode using function pthread_detach(), so that no program call
> pthread_join() is required to recycle, and when the thread exits,
> the system automatically reclaims resources.
> 
> Fixes: 819d0d1d57f1 ("net/ixgbe: fix blocking system events")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Zhu Tao <taox.zhu@intel.com>
> ---
>  drivers/net/ixgbe/ixgbe_ethdev.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> v2 changes:
> 	commit log.
> 
> diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
> index 2c57976..f141ae4 100644
> --- a/drivers/net/ixgbe/ixgbe_ethdev.c
> +++ b/drivers/net/ixgbe/ixgbe_ethdev.c
> @@ -4165,11 +4165,9 @@ static int ixgbevf_dev_xstats_get_names(__rte_unused struct rte_eth_dev *dev,
>  ixgbe_dev_cancel_link_thread(struct rte_eth_dev *dev)
>  {
>  	struct ixgbe_adapter *ad = dev->data->dev_private;
> -	void *retval;
> 
>  	if (!ixgbe_dev_wait_setup_link_complete(dev)) {
>  		pthread_cancel(ad->link_thread_tid);
> -		pthread_join(ad->link_thread_tid, &retval);

As you already waiting for link thread termination in
ixgbe_dev_wait_setup_link_complete(), do you still need
pthread_cancel() here? 

>  		rte_atomic32_clear(&ad->link_thread_running);
>  		PMD_DRV_LOG(ERR, "Link thread not complete, cancel it!");
>  	}
> @@ -4186,6 +4184,7 @@ static int ixgbevf_dev_xstats_get_names(__rte_unused struct rte_eth_dev *dev,
>  	u32 speed;
>  	bool autoneg = false;
> 
> +	pthread_detach(pthread_self());
>  	speed = hw->phy.autoneg_advertised;
>  	if (!speed)
>  		ixgbe_get_link_capabilities(hw, &speed, &autoneg);
> --
> 1.8.3.1