Re: Stalls when starting a VSOCK listening socket: soft lockups, RCU stalls, timeout

Matthieu Baerts
2026-03-10T11:24:10Z

Hi Thomas,

On 10/03/2026 11:06, Thomas Gleixner wrote:
> On Tue, Mar 10 2026 at 11:03, Thomas Gleixner wrote:
>> On Tue, Mar 10 2026 at 10:00, Jiri Slaby wrote:
>> Yes. There is an issue. Peter and me just discovered that as well, but
>> in the case at hand it can't be the problem. The missing task is on the
>> CPU which means it must be visible in the thread list and task list.
>
> The updated debug patch fixes this fork problem and adds more tracing to
> it.

Thank you for this new patch, and for continuing to look at this!

> Mathieu, can you give it another spin please?

Just did. Output is available there:

https://github.com/user-attachments/files/25867817/issue-617-debug-20260310.txt.gz

Only 7.7k lines this time.

Cheers,
Matt
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