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From: "Zhang, Yuying" <yuying.zhang@intel.com>
To: "Yigit, Ferruh" <ferruh.yigit@intel.com>,
	"dev@dpdk.org" <dev@dpdk.org>,
	"Zhang, Qi Z" <qi.z.zhang@intel.com>,
	"Xing, Beilei" <beilei.xing@intel.com>
Cc: "stable@dpdk.org" <stable@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH v2] net/i40e: fix virtual channel confiliction issue
Date: Fri, 30 Oct 2020 05:32:52 +0000
Message-ID: <BYAPR11MB3511E22A3C6292E3EC4CC6638E150@BYAPR11MB3511.namprd11.prod.outlook.com> (raw)
In-Reply-To: <1b5954fa-aff1-2694-c205-551b00a7773a@intel.com>

> -----Original Message-----
> From: Ferruh Yigit <ferruh.yigit@intel.com>
> Sent: Friday, October 23, 2020 6:42 PM
> To: Zhang, Yuying <yuying.zhang@intel.com>; dev@dpdk.org; Zhang, Qi Z
> <qi.z.zhang@intel.com>; Xing, Beilei <beilei.xing@intel.com>
> Cc: stable@dpdk.org
> Subject: Re: [dpdk-dev] [PATCH v2] net/i40e: fix virtual channel confiliction issue
> On 10/19/2020 3:20 AM, Yuying Zhang wrote:
> > i40evf_execute_vf_cmd() uses _atomic_set_cmd() to execute virtual
> > channel commands safely in multi-process mode and multi-thread mode.
> > However, it returns -1 when one process or thread is pending. Add
> > rte_spinlock_trylock() to handle this issue in concurrent scenarios.
> >
> Should '_atomic_set_cmd()' removed, since spinlock it added?
> > Fixes: 4861cde46116 ("i40e: new poll mode driver")
> > Cc: stable@dpdk.org
> >
> > Signed-off-by: Yuying Zhang <yuying.zhang@intel.com>
> <...>
'_atomic_set_cmd()' is also used for sync with i40evf_handle_aq_msg to handle the request <-> response.
It is not just used for multi-task. I prefer to keep the atomic.

  reply	other threads:[~2020-10-30  5:33 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-20 15:28 [dpdk-dev] [PATCH v1] " Yuying Zhang
2020-10-19  2:20 ` [dpdk-dev] [PATCH v2] " Yuying Zhang
2020-10-22  8:54   ` Zhang, Qi Z
2020-10-23 10:41   ` Ferruh Yigit
2020-10-30  5:32     ` Zhang, Yuying [this message]
2020-10-30  8:30       ` Ferruh Yigit

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