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Problem with fcheck job on Debian9 after kernel update




The fcheck task take +45000 seconds to complete instead of +8500 after
latest kernel update. Server is running on ESX as VM.
Is somebody experiencing similar prolonging task execution on CPU
intensive tasks? May be related to L1TF "Spectre-family" patches.
What commands to run to investigate the root cause in more details?

Already opened bug report:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=908647

-- 
Peter