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From: Stephen Hemminger <stephen@networkplumber.org>
To: Dongdong Liu <liudongdong3@huawei.com>
Cc: <dev@dpdk.org>, <ferruh.yigit@amd.com>, <thomas@monjalon.net>,
	<andrew.rybchenko@oktetlabs.ru>, <stable@dpdk.org>
Subject: Re: [PATCH 4/5] net/hns3: fix TM thread safety risk
Date: Sat, 5 Aug 2023 08:58:25 -0700	[thread overview]
Message-ID: <20230805085825.0d6caf26@hermes.local> (raw)
In-Reply-To: <20230805083627.8681-5-liudongdong3@huawei.com>

On Sat, 5 Aug 2023 16:36:26 +0800
Dongdong Liu <liudongdong3@huawei.com> wrote:

> From: Chengwen Feng <fengchengwen@huawei.com>
> 
> The driver-related TM (traffic management) info is implemented through
> the linked list. The following threads are involved in the read and
> write of the TM info:
> 
> 1. main thread: invokes the rte_tm_xxx() API family to modify or read.
> 2. interrupt thread: will read TM info in reset recover process.
> 3. telemetry/proc-info thread: invoke rte_eth_dev_priv_dump() API to
>    read TM info.
> 
> Currently, thread safety protection of TM info is implemented only in
> the following operations:
> 1. some of the rte_tm_xxx() API's implementation.
> 2. reset recover process.
> 
> Thread safety risks may exist in other scenarios, so fix by:
> 1. make sure all the rte_tm_xxx() API's implementations protected by
>    hw.lock.
> 2. make sure rte_eth_dev_priv_dump() API's implementation protected
>    by hw.lock.
> 
> Fixes: c09c7847d892 ("net/hns3: support traffic management")
> Fixes: e4cfe6bb9114 ("net/hns3: dump TM configuration info")
> Cc: stable@dpdk.org

I hope no locking is necessary in the data path.

  reply	other threads:[~2023-08-05 15:58 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-08-05  8:36 [PATCH 0/5] net/hns3: some bugfixes for hns3 Dongdong Liu
2023-08-05  8:36 ` [PATCH 1/5] net/hns3: fix VF default MAC modified when set failed Dongdong Liu
2023-08-05  8:36 ` [PATCH 2/5] net/hns3: return ENOSPC if not enough MCAST filter resource Dongdong Liu
2023-08-05  8:36 ` [PATCH 3/5] net/hns3: flush multicast MAC address if mc_addr_set is NULL Dongdong Liu
2023-08-05  8:36 ` [PATCH 4/5] net/hns3: fix TM thread safety risk Dongdong Liu
2023-08-05 15:58   ` Stephen Hemminger [this message]
2023-08-07 10:50     ` Dongdong Liu
2023-08-05  8:36 ` [PATCH 5/5] net/hns3: fix un-align format TM info Dongdong Liu
2023-09-21 13:31 ` [PATCH 0/5] net/hns3: some bugfixes for hns3 Ferruh Yigit

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