[LU-11257] RHEL/CentOS 3.10.0-862.11.6.el7.x86_64 kernel breaks LNet

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: Lustre 2.10.4
• Environment: CentOS 7.5, x86_64
• Severity: 3
• Assignee: Peter Jones
• Reporter: Stanford Research Computing Center

Description

It looks like the latest kernel update from CentOS/RedHat prevents LNet to work on Infiniband interfaces (mlx5).

Symptoms

No LNet communication, self-ping doesn't work:

# lctl list_nids
10.9.101.60@o2ib4
# lctl ping 10.9.101.60@o2ib4
failed to ping 10.9.101.60@o2ib4: Input/output error

Communicating with other nodes is impossible, as is mounting filesystems.
The exact same node with the exact same configuration works flawlessly with kernel 3.10.0-862.9.1.el7.x86_64

 Versions

# uname -r
3.10.0-862.11.6.el7.x86_64
# cat /sys/fs/lustre/version
2.10.4

HW

 

# ibstat
CA 'mlx5_0'
        CA type: MT4115
        Number of ports: 1
        Firmware version: 12.21.3012
        Hardware version: 0
        Node GUID: 0x7cfe900300268c04
        System image GUID: 0x7cfe900300268c04
        Port 1:
                State: Active
                Physical state: LinkUp
                Rate: 100
                Base lid: 72
                LMC: 0
                SM lid: 6
                Capability mask: 0x2651e848
                Port GUID: 0x7cfe900300268c04
                Link layer: InfiniBand

 

Kernel logs

[ 1185.337098] LNetError: 22109:0:(o2iblnd_cb.c:2513:kiblnd_passive_connect()) Can't accept 10.9.101.60@o2ib4: -22 
[ 1185.348376] LNet: 22109:0:(o2iblnd_cb.c:2212:kiblnd_reject()) Error -22 sending reject 
[ 1185.357473] LNetError: 22109:0:(o2iblnd_cb.c:2721:kiblnd_rejected()) 10.9.101.60@o2ib4 rejected: consumer defined fatal error

Issue Links

• is duplicated by: LU-11261 ko2iblnd lnet not working after 3.10.0-862.11.6 kernel update
• is related to: LU-11253 kernel update [RHEL7.5 3.10.0-862.11.6.el7]