linux-kernel - Re: [Patch v3] net: mana: Batch ringing RX queue doorbell on receiving packets

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Message-ID: <20230629091129.19217388@kernel.org>
Date:   Thu, 29 Jun 2023 09:11:29 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     longli@...uxonhyperv.com
Cc:     Paolo Abeni <pabeni@...hat.com>, Jason Gunthorpe <jgg@...pe.ca>,
        Leon Romanovsky <leon@...nel.org>,
        Ajay Sharma <sharmaajay@...rosoft.com>,
        Dexuan Cui <decui@...rosoft.com>,
        "K. Y. Srinivasan" <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Wei Liu <wei.liu@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>, linux-rdma@...r.kernel.org,
        linux-hyperv@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Long Li <longli@...rosoft.com>,
        stable@...r.kernel.org
Subject: Re: [Patch v3] net: mana: Batch ringing RX queue doorbell on
 receiving packets

On Thu, 29 Jun 2023 10:42:34 +0200 Paolo Abeni wrote:
> > While we are making changes in this code path, change the code for
> > ringing doorbell to set the WQE_COUNT to 0 for Receive Queue. The
> > hardware specification specifies that it should set to 0. Although
> > currently the hardware doesn't enforce the check, in the future releases
> > it may do.

And please split this cleanup into a separate patch, it doesn't sound
like it has to be done as part of the optimization.