ACK: [SRU][S/R/N/J:linux-azure][PATCH 0/2] Backport of VM Freeze Fix – "Avoid DMA Queue Allocation Failure Under Memory Fragmentation

[Rickey Castillo Valenzuela]

On 8/13/26 15:16, John Cabaj via kernel-team wrote:
> BugLink: https://bugs.launchpad.net/bugs/2163445
>
> SRU Justification
>
> [Impact]
>
> * Microsoft requested backport of patchset to address Azure VM freezes when performing queue depth tuning with MANA under AI workloads, particularly under memory-fragmentation conditions.
>
> [Fix]
>
> * Stonking/Resolute - clean cherry-pick of following patch from linux-next:
> * 1da1a037bc60: "net: mana: Route ring-buffer access through offset-based helpers"
> * Stonking/Resolute/Noble/Jammy - straightforward backport of following patch from linux-next:
> * 23adfc77c22c: "net: mana: Fall back to scattered pages for GDMA queues"
>
> [Test Plan]
>
> * Compile tested
> * Microsoft tested via test kernel
>
> [Regression potential]
>
> * Patches isolated to MANA specifically. Possibly regression could result in unexpected behavior of MANA driver.
>
> [Other info]
>
> * SF#00446650
>
> Aditya Garg (2):
>    net: mana: Route ring-buffer access through offset-based helpers
>    net: mana: Fall back to scattered pages for GDMA queues
>
>   .../net/ethernet/microsoft/mana/gdma_main.c   | 219 +++++++++++++++---
>   .../net/ethernet/microsoft/mana/hw_channel.c  |   2 +-
>   drivers/net/ethernet/microsoft/mana/mana_en.c |   3 +
>   include/net/mana/gdma.h                       |  19 +-
>   4 files changed, 205 insertions(+), 38 deletions(-)
>
Signed-off-by: Rickey Castillo <rickey.castillo.valenzuela at canonical.com>