Re: WQ_UNBOUND workqueue warnings from multiple drivers

From: Sagi Grimberg
Date: Thu May 09 2024 - 02:36:43 EST




On 09/05/2024 2:16, Kamaljit Singh wrote:
Sagi,

Does this happen with a 90-%100% read workload?
Yes, we’ve now seen it with 100% reads as well. Here’s the Medusa cmd we used. I’ve removed the devices for brevity.
sudo /opt/medusa_labs/test_tools/bin/maim 20g -b8K -Q128 -Y1 -M30 --full-device -B3 -r -d900000 <device_list>
We saw the original issue with the upstream kernel v6.6.21. But now we’re also seeing it with Ubuntu 24.04 (kernel 6.8.0-31-generic), where IOs are timing out and forcing connection drops.

Thanks for the info.

Question, are you working with a Linux controller?
No, with our ASIC (NVMe Fabrics bridge).
what is the ctrl ioccsz?
ioccsz    : 4

I see, what is the mdts? and what are the r2t lengths the controller is sending to the host?