** Also affects: linux-bluefield (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux-bluefield (Ubuntu Jammy)
Importance: Undecided
Status: New
** Changed in: linux-bluefield (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/2020606
Title:
net: openvswitch: fix race on port output
Status in linux-bluefield package in Ubuntu:
Invalid
Status in linux-bluefield source package in Focal:
New
Status in linux-bluefield source package in Jammy:
New
Bug description:
fix race on port output
* Explain the bug(s)
there is a race condition on port output
* brief explanation of fixes
We found that upstream linux has the same issue and fix
commit 066b86787fa3d97b7aefb5ac0a99a22dad2d15f8
Author: Felix Huettner <[email protected]>
Date: Wed Apr 5 07:53:41 2023 +0000
net: openvswitch: fix race on port output
assume the following setup on a single machine:
1. An openvswitch instance with one bridge and default flows
2. two network namespaces "server" and "client"
3. two ovs interfaces "server" and "client" on the bridge
4. for each ovs interface a veth pair with a matching name and 32 rx and
tx queues
5. move the ends of the veth pairs to the respective network namespaces
6. assign ip addresses to each of the veth ends in the namespaces (needs
to be the same subnet)
7. start some http server on the server network namespace
8. test if a client in the client namespace can reach the http server
...
Fixes: 7f8a436eaa2c ("openvswitch: Add conntrack action")
Co-developed-by: Luca Czesla <[email protected]>
Signed-off-by: Luca Czesla <[email protected]>
Signed-off-by: Felix Huettner <[email protected]>
Reviewed-by: Eric Dumazet <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
Link: https://lore.kernel.org/r/ZC0pBXBAgh7c76CA@kernel-bug-kernel-bug
Signed-off-by: Jakub Kicinski <[email protected]>
* How to test
After configuring QoS on BF-3:
Disable all priorities
Set priorities [0, 0, 0, 0, 0, 0, 0, 0]
Remove all policies
Remove all traffic classes
Add policy (policy_name=ND_traffic, traffic_type=RDMA, priority=5,
port=20000, dscp=None)
Add policy (policy_name=TCP_traffic, traffic_type=TCP, priority=4,
port=26000, dscp=None)
Add traffic class two prio TC with prio_list=[5, 4], min_bw=76, algorithm=ETS
Enable QOS on adapter SLOT 5 Port 1
Restart driver (detach VFs -> restart with devcon -> attach VFs)
BF-3 sometimes stops responding. need to run it multiple times!
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