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Thu, 12 Dec 2024 10:36:35 GMT Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 71E7D2004B; Thu, 12 Dec 2024 10:36:35 +0000 (GMT) Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 32BC620040; Thu, 12 Dec 2024 10:36:35 +0000 (GMT) Received: from [9.152.224.86] (unknown [9.152.224.86]) by smtpav07.fra02v.mail.ibm.com (Postfix) with ESMTP; Thu, 12 Dec 2024 10:36:35 +0000 (GMT) Message-ID: Date: Thu, 12 Dec 2024 11:36:35 +0100 Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net-next] net/mlx5e: Transmit small messages in linear skb To: Dragos Tatulea , Alexandra Winter , Alexander Lobakin Cc: Rahul Rameshbabu , Saeed Mahameed , Tariq Toukan , Leon Romanovsky , David Miller , Jakub Kicinski , Paolo Abeni , Eric Dumazet , Andrew Lunn , Nils Hoppmann , netdev@vger.kernel.org, linux-s390@vger.kernel.org, Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Sven Schnelle , Thorsten Winkler , Simon Horman , Niklas Schnelle References: <20241204140230.23858-1-wintera@linux.ibm.com> <8e7f3798-c303-44b9-ae3f-5343f7f811e8@linux.ibm.com> <554a3061-5f3b-4a7e-a9bd-574f2469f96e@nvidia.com> <54738182-3438-4a58-8c33-27dc20a4b3fe@linux.ibm.com> <89c67aa3-4b84-45c1-9e7f-a608957d5aeb@nvidia.com> Content-Language: en-US From: Christian Borntraeger In-Reply-To: <89c67aa3-4b84-45c1-9e7f-a608957d5aeb@nvidia.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 7L9s-Ny2rPyhePN9q9L9qpbZDemvRdKy X-Proofpoint-ORIG-GUID: 8Q-We0TaB2HNx-Xa6qoACCUbGOyn5mTT X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1051,Hydra:6.0.680,FMLib:17.12.62.30 definitions=2024-10-15_01,2024-10-11_01,2024-09-30_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 priorityscore=1501 clxscore=1011 phishscore=0 bulkscore=0 mlxlogscore=727 impostorscore=0 spamscore=0 malwarescore=0 suspectscore=0 adultscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2411120000 definitions=main-2412120074 Am 11.12.24 um 18:28 schrieb Dragos Tatulea: >> My preferred scenario for the next steps would be the following: >> 1) It would be great if we could get a simple mitigation patch upstream, that the distros could >> easily backport. This would avoid our customers experiencing performance regression when they >> upgrade their distro versions. (e.g. from RHEL8 to RHEL9 or RHEL10 just as an example) >> > Stupid question on my behalf: why can't this patch be taken as a distro > patch for s390 and carried over over releases? This way the kernel > upgrade pain would be avoided. This is not how distros work today. All code/patches must come from upstream and all code/patches must be cross-architecture. There are exceptions, but only for very critical things. Furthermore, the right answer to avoid upgrade pain is to fix things upstream. So lets try to find a solution that we can integrate. Christian