** Changed in: linux-azure (Ubuntu Jammy)
Status: In Progress => Fix Committed
** Changed in: linux-azure (Ubuntu Lunar)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/2039208
Title:
Azure: mlx5e: Add support for PCI relaxed ordering (RO) for better
performance
Status in linux-azure package in Ubuntu:
Fix Released
Status in linux-azure source package in Jammy:
Fix Committed
Status in linux-azure source package in Lunar:
Fix Committed
Bug description:
SRU Justification
[Impact]
On Azure, the VM SKU Standard_NC64as_T4_v3's bandwidth is 30 Gbps, but we can
only reach 15~20 Gbps with the 5.15.0-1049-azure kernel in Ubuntu 20.04 or the
6.2.0-1014-azure kernel in Ubuntu 22.04.
After I pick up the upstream patch(es) to enable PCI relaxed ordering
(RO) for the Mellanox VF NIC, the throughput goes up to 30.4 Gbps.
[Fix]
[1]
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=17347d5430c4e4e1a3c58ffa2732746bd26a9c02
[2]
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e2351e517068718724f1d3b4010e2a41ec91fa76
[3]
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=77528e2aed9246cf8017b8a6f1b658a264d6f2b2
[4]
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ed4b0661cce119870edb1994fd06c9cbc1dc05c3
[Test Plan]
Microsoft tested
[Regression Potential]
Mellanox connections could be corrupted or run slower.
[Other Info]
SF: #00370735
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