** Changed in: linux-azure (Ubuntu Focal)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1896760
Title:
Mellanox patch for fixing failures in ConnectX3 Pro/DPDK
Status in linux package in Ubuntu:
Incomplete
Status in linux-azure package in Ubuntu:
In Progress
Status in linux source package in Focal:
Incomplete
Status in linux-azure source package in Focal:
Fix Committed
Bug description:
[Impact]
Mellanox has made a patch to fix DPDK failure in Azure with ConnextX3
pro:
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-
next.git/commit/drivers/infiniband/hw/mlx4?h=next-20200908&id=ec78b3bd66bc9a015505df0ef0eb153d9e64b03b
Older kernels don't need this patch. It only affects newer kernels
with the following patch:
commit 9012a6de6b43146c934752a60d358c31dbad4368
Author: Kamal Heib <[email protected]>
Date: Tue May 19 13:12:17 2020 -0400
[infiniband] IB/core: Fix potential NULL pointer dereference in pkey cache
If a kernel ships with this patch, it needs the 1st patch.
[Test Case]
Boot the current 5.4 linux-azure kernel from focal-updates
(5.4.0-48.52) on an Azure instance with a mlx4 device without RoCE
support, the devices are wrongly ignored.
The expected result is that those devices are created an available.
[Regression Potential]
A potential regression would only affect instances running the linux-
azure 5.4 kernels with mlx4 devices.
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