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From: wangyunjian <wangyunjian@huawei.com>
To: Thomas Monjalon <thomas@monjalon.net>
CC: "dev@dpdk.org" <dev@dpdk.org>, "stable@dpdk.org" <stable@dpdk.org>,
 "keith.wiles@intel.com" <keith.wiles@intel.com>, "ophirmu@mellanox.com"
 <ophirmu@mellanox.com>, "Lilijun (Jerry)" <jerry.lilijun@huawei.com>,
 xudingke <xudingke@huawei.com>, "stable@dpdk.org" <stable@dpdk.org>
Thread-Topic: [dpdk-stable] [dpdk-dev] [PATCH] net/tap: free mempool when
 closing
Thread-Index: AQHWZZzOozuoX/cl2U+8EaesNm5Ws6kpDJsAgAIHZIA=
Date: Thu, 6 Aug 2020 12:47:24 +0000
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References: <40a0e68ed41b05fba8cbe5f34e369a59a1c0c09c.1596022448.git.wangyunjian@huawei.com>
 <4268011.XMymgrSB0u@thomas>
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Subject: Re: [dpdk-dev] [dpdk-stable] [PATCH] net/tap: free mempool when
 closing
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> -----Original Message-----
> From: Thomas Monjalon [mailto:thomas@monjalon.net]
> Sent: Wednesday, August 5, 2020 9:48 PM
> To: wangyunjian <wangyunjian@huawei.com>
> Cc: dev@dpdk.org; stable@dpdk.org; keith.wiles@intel.com;
> ophirmu@mellanox.com; Lilijun (Jerry) <jerry.lilijun@huawei.com>; xudingk=
e
> <xudingke@huawei.com>; wangyunjian <wangyunjian@huawei.com>;
> stable@dpdk.org
> Subject: Re: [dpdk-stable] [dpdk-dev] [PATCH] net/tap: free mempool when
> closing
>=20
> 29/07/2020 13:35, wangyunjian:
> > From: Yunjian Wang <wangyunjian@huawei.com>
> >
> > When setup tx queues, we will create a mempool for the 'gso_ctx'.
> > The mempool is not freed when closing tap device. If free the tap
> > device and create it with different name, it will create a new
> > mempool. This maybe cause an OOM.
>=20
> While at it, please look at implementing RTE_ETH_DEV_CLOSE_REMOVE
> behaviour in tap. Thanks
>=20

I read the codes about tap device. Currently, the tap pmd doesn't
use RTE_ETH_DEV_CLOSE_REMOVE flag.

Thanks,
Yunjian