From: Jakub Kicinski <kuba@kernel.org>
To: Long Li <longli@microsoft.com>
Cc: Greg KH <gregkh@linuxfoundation.org>,
Paolo Abeni <pabeni@redhat.com>,
"longli@linuxonhyperv.com" <longli@linuxonhyperv.com>,
Jason Gunthorpe <jgg@ziepe.ca>, Leon Romanovsky <leon@kernel.org>,
Ajay Sharma <sharmaajay@microsoft.com>,
Dexuan Cui <decui@microsoft.com>,
KY Srinivasan <kys@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
Wei Liu <wei.liu@kernel.org>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
"linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>,
"linux-hyperv@vger.kernel.org" <linux-hyperv@vger.kernel.org>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"stable@vger.kernel.org" <stable@vger.kernel.org>
Subject: Re: [Patch v3] net: mana: Batch ringing RX queue doorbell on receiving packets
Date: Fri, 30 Jun 2023 16:38:05 -0700 [thread overview]
Message-ID: <20230630163805.79c0bdf5@kernel.org> (raw)
In-Reply-To: <PH7PR21MB3263330E6A32D81D52B955FBCE2AA@PH7PR21MB3263.namprd21.prod.outlook.com>
On Fri, 30 Jun 2023 20:42:28 +0000 Long Li wrote:
> > > 5.15 and kernel 6.1. (those kernels are longterm) They need this fix to achieve
> > > the performance target.
> >
> > Why can't they be upgraded to get that performance target, and all the other
> > goodness that those kernels have? We don't normally backport new features,
> > right?
>
> I think this should be considered as a fix, not a new feature.
>
> MANA is designed to be 200GB full duplex at the start. Due to lack of
> hardware testing capability at early stage of the project, we could only test 100GB
> for the Linux driver. When hardware is fully capable of reaching designed spec,
> this bug in the Linux driver shows up.
That part we understand.
If I were you I'd try to convince Greg and Paolo that the change is
small and significant for user experience. And answer Greg's question
why upgrading the kernel past 6.1 is a challenge in your environment.
next prev parent reply other threads:[~2023-06-30 23:38 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-26 23:57 [Patch v3] net: mana: Batch ringing RX queue doorbell on receiving packets longli
2023-06-29 8:42 ` Paolo Abeni
2023-06-29 16:11 ` Jakub Kicinski
2023-06-29 18:19 ` Long Li
2023-06-29 16:53 ` Haiyang Zhang
2023-06-29 17:06 ` Jakub Kicinski
2023-06-29 18:18 ` Long Li
2023-06-30 10:36 ` Paolo Abeni
2023-06-30 17:31 ` Long Li
2023-06-30 19:46 ` Greg KH
2023-06-30 20:42 ` Long Li
2023-06-30 23:38 ` Jakub Kicinski [this message]
2023-07-02 20:18 ` Long Li
2023-07-03 10:14 ` Paolo Abeni
2023-07-06 17:51 ` Long Li
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