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1. github-actions commented on Sep 29, 2026

   

   github-actionsBot

   on Sep 29, 2026 – with GitHub Actions

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   Logs are required for review from WSL team

   If this a feature request, please reply with '/feature'. If this is a question, reply with '/question'.
   Otherwise, please attach logs by following the instructions below, your issue will not be reviewed unless they are added. These logs will help us understand what is going on in your machine.

   How to collect WSL logs

   Download and execute collect-wsl-logs.ps1 in an administrative powershell prompt:

   Invoke-WebRequest -UseBasicParsing "https://raw.githubusercontent.com/microsoft/WSL/master/diagnostics/collect-wsl-logs.ps1" -OutFile collect-wsl-logs.ps1
   Set-ExecutionPolicy Bypass -Scope Process -Force
   .\collect-wsl-logs.ps1
   

   The script will output the path of the log file once done.

   If this is a networking issue, please use .\collect-wsl-logs.ps1 -LogProfile networking instead, following the instructions in Collect WSL logs for networking issues

   Once completed please upload the output files to this GitHub issue.

   See Collect WSL logs (recommended method).

   If you choose to email these logs instead of attaching them to the bug, please send them to [email protected] with the GitHub issue number in the subject, and include a link to your GitHub issue comment in the message body, and reply with '/emailed-logs'.
2. github-actions

   added

   needs-author-feedback

   on Sep 29, 2026
3. Ben Hillis (benhillis)

   assigned

   Copilot

   and

   Ben Hillis (benhillis)

   on Sep 29, 2026
4. Copilot

   linked a pull request that will close this issuePrevent WSL launch failures on hosts with more than 256 logical processors #41732on Sep 29, 2026
5. kgopal3-intel commented on Sep 29, 2026

   

   Karthik Gopalakrishnan (kgopal3-intel)

   on Sep 29, 2026

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   WslLogs-2026-09-29_16-28-37.tar.gz
6. microsoft-github-policy-service

   removed

   needs-author-feedback

   on Sep 29, 2026
7. github-actions commented on Sep 29, 2026

   

   github-actionsBot

   on Sep 29, 2026 – with GitHub Actions

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   Diagnostic information

   .wslconfig found
   Detected appx version: 2.9.13.0
   Detected user visible error: Wsl/Service/CreateInstance/CreateVm/HCS/E_INVALIDARG
   
8. benhillis commented on Sep 30, 2026

   

   Ben Hillis (benhillis)

   on Sep 30, 2026

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   I have a potential fix for this, but I don't have access to any literal supercomputers to test it out ;)

   Karthik Gopalakrishnan (@kgopal3-intel) - are you able to build a private WSL based on this branch to see if this resolves the issue you are seeing (after removing the config option to cap CPU count of course).

   #41741

   Thanks!
9. kgopal3-intel commented on Sep 30, 2026

   

   Karthik Gopalakrishnan (kgopal3-intel)

   on Sep 30, 2026

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   Hello Ben Hillis (@benhillis) - I don't think I have the ability to. If you can share detailed instructions, I can try. But it maybe faster if you just share a private binary with the fix with details to deploy. I have the platform ready to test. Thanks for the quick response.
10. kgopal3-intel commented on Oct 2, 2026

    

    Karthik Gopalakrishnan (kgopal3-intel)

    on Oct 2, 2026

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    Hello Ben Hillis (@benhillis) - Thank you for sharing the test package with me offline. I was able to deploy it on my test system & confirm that Debian in WSL2 launches successfully on this host with 384 LPs. Running nproc in Debian also shows 384.

    Let me know if you would like me to collect any other information. If not, we can close this bug & wait for the fix to make it to a release & retest.

    Thanks again for the quick turnaround.
11. Ben Hillis (benhillis)

    closed this as completedin #41741on Oct 2, 2026