RHEL9 kernel errors like task xxxx blocked more than xxx seconds

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bravo0916

Member
Jan 29, 2024
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Hello Team,

Recently, I have gotten following kernel errors from some guest OS (RHEL9). The storage RAID is RAIDz2 (RAID6). Also, there are 2 Windows guest OS and performance is not good. For instance, it will take a couple of minutes after clicking icons or start programs. I didn't use software RAID before and I didn't get these kinds of erros.
I am using SSDx4 with RAIDz2. This might be the root cause??

Proxmox version: 8.3.1
All guest OS SCSI Controller: VirtIO SCSI single

1. task kworker blocked for more than 245 seconds, Not tainted xxxxxx
2. task xfsaild blocked for more that 122 seconds, Not tainted xxxxx
3. task connection blocked for more than 122 seconds Not tainted xxxx

Thank you for your support!
 
Last edited:
UdoB

[TUTORIAL] Thread 'FabU: Can I use ZFS RaidZ for my VMs?'

Assumption: you use at least four identical devices for that. Mirrors, RaidZ, RaidZ2 are possible - theoretically.

Technically correct answer: yes, it works. But the right answers is: no, do not do that! The recommendation is very clear: use “striped mirrors”. This results in something similar to a classic Raid10.

(1) RaidZ1 (and Z2 too) gives you the IOPS of a single device, completely independent of the actual number of physical devices. For the “four devices, mirrored” approach this will double --> giving twice as many Operations per Second. For a large-file...
  • Like
 
Kingneutron said:
UdoB

[TUTORIAL] Thread 'FabU: Can I use ZFS RaidZ for my VMs?'

Assumption: you use at least four identical devices for that. Mirrors, RaidZ, RaidZ2 are possible - theoretically.

Technically correct answer: yes, it works. But the right answers is: no, do not do that! The recommendation is very clear: use “striped mirrors”. This results in something similar to a classic Raid10.

(1) RaidZ1 (and Z2 too) gives you the IOPS of a single device, completely independent of the actual number of physical devices. For the “four devices, mirrored” approach this will double --> giving twice as many Operations per Second. For a large-file...
  • Like
Click to expand...
Hi,

Thanks for your quick response. So RAID1 (mirror) is recommended. Is this correct??

Regards,
 
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