<html><head></head><body><div>On Thu, 2023-10-12 at 11:14 -0600, Tim Gardner wrote:</div><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><div>BugLink: <a href="https://bugs.launchpad.net/bugs/2039208">https://bugs.launchpad.net/bugs/2039208</a><br></div><div><br></div><div>SRU Justification<br></div><div><br></div><div>[Impact]<br></div><div>On Azure, the VM SKU Standard_NC64as_T4_v3's bandwidth is 30 Gbps, but we can<br></div><div>only reach 15~20 Gbps with the 5.15.0-1049-azure kernel in Ubuntu 20.04 or<br></div><div>the 6.2.0-1014-azure kernel in Ubuntu 22.04.<br></div><div><br></div><div>After I pick up the upstream patch(es) to enable PCI relaxed ordering (RO) for<br></div><div>the Mellanox VF NIC, the throughput goes up to 30.4 Gbps.<br></div><div><br></div><div>[Fix]<br></div><div><br></div><div>[1] <a href="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=17347d5430c4e4e1a3c58ffa2732746bd26a9c02">https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=17347d5430c4e4e1a3c58ffa2732746bd26a9c02</a><br></div><div>[2] <a href="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e2351e517068718724f1d3b4010e2a41ec91fa76">https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e2351e517068718724f1d3b4010e2a41ec91fa76</a><br></div><div>[3] <a href="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=77528e2aed9246cf8017b8a6f1b658a264d6f2b2">https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=77528e2aed9246cf8017b8a6f1b658a264d6f2b2</a><br></div><div>[4] <a href="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ed4b0661cce119870edb1994fd06c9cbc1dc05c3">https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ed4b0661cce119870edb1994fd06c9cbc1dc05c3</a><br></div><div><br></div><div>[Test Plan]<br></div><div><br></div><div>Microsoft tested<br></div><div><br></div><div>[Regression Potential]<br></div><div><br></div><div>Mellanox connections could be corrupted or run slower.<br></div><div><br></div><div>[Other Info]<br></div><div><br></div><div>SF: #00370735<br></div><div><br></div><div><br></div></blockquote><div><br></div><div><span><pre>-- <br></pre><pre>Acked-by: Philip Cox <philip.cox@canonical.com> </pre></span></div></body></html>