Azure: MANA: Fix doorbell access for receives
Bug #2027615 reported by
Tim Gardner
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux-azure (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned | ||
Jammy |
Fix Released
|
Medium
|
Tim Gardner | ||
Lunar |
Fix Released
|
Medium
|
Tim Gardner |
Bug Description
SRU Justification
[Impact]
It's inefficient to ring the doorbell page every time a WQE is posted to
the received queue. Excessive MMIO writes result in CPU spending more
time waiting on LOCK instructions (atomic operations), resulting in
poor scaling performance.
[Test Plan]
MSFT tested.
[Regression Potential]
The MANA receive queue could stop.
[Other Info]
SF: #00363437
These 2 patches have been submitted for upstream inclusion.
CVE References
- 2022-20369
- 2022-2196
- 2022-2663
- 2022-3061
- 2022-3524
- 2022-3545
- 2022-3564
- 2022-3565
- 2022-3566
- 2022-3567
- 2022-3594
- 2022-3621
- 2022-3643
- 2022-41218
- 2022-4139
- 2022-42703
- 2022-42896
- 2022-4378
- 2022-4382
- 2022-43945
- 2022-45934
- 2022-47520
- 2022-47940
- 2022-48502
- 2023-0045
- 2023-0179
- 2023-0266
- 2023-0461
- 2023-0597
- 2023-1075
- 2023-1118
- 2023-1281
- 2023-1380
- 2023-1670
- 2023-1829
- 2023-1859
- 2023-1872
- 2023-2124
- 2023-2176
- 2023-23559
- 2023-2612
- 2023-2640
- 2023-26545
- 2023-30456
- 2023-3090
- 2023-31248
- 2023-3141
- 2023-31436
- 2023-32233
- 2023-32629
- 2023-3269
- 2023-3389
- 2023-3390
- 2023-34324
- 2023-3439
- 2023-35001
- 2023-46813
- 2023-51780
- 2023-51781
- 2023-5972
- 2023-6111
- 2023-6176
- 2023-6531
- 2023-6606
- 2023-6622
- 2023-6817
- 2023-6915
- 2023-6931
- 2023-6932
- 2024-0193
- 2024-0565
- 2024-0582
- 2024-0646
affects: | linux (Ubuntu) → linux-azure (Ubuntu) |
Changed in linux-azure (Ubuntu Jammy): | |
assignee: | nobody → Tim Gardner (timg-tpi) |
importance: | Undecided → Medium |
status: | New → In Progress |
Changed in linux-azure (Ubuntu Lunar): | |
assignee: | nobody → Tim Gardner (timg-tpi) |
status: | New → In Progress |
importance: | Undecided → Medium |
Changed in linux-azure (Ubuntu Lunar): | |
status: | In Progress → Fix Committed |
Changed in linux-azure (Ubuntu Jammy): | |
status: | In Progress → Fix Committed |
tags: |
added: verification-done-jammy verification-done-lunar removed: verification-needed-jammy verification-needed-lunar |
tags: |
added: verification-done-mantic-linux-azure removed: verification-needed-mantic-linux-azure |
To post a comment you must log in.
https:/ /lists. ubuntu. com/archives/ kernel- team/2023- July/141045. html