This was introduced with upstream stress-ng commit:

commit f954db3afe8ae2dc9474908250d3a2c595200a94
Author: Colin Ian King <>
Date:   Wed Jun 7 20:01:16 2017 +0100

    stress-vforkmany: remove as many calls as possible
    We should remove as many function calls so we don't clobber the stack.
    Signed-off-by: Colin Ian King <>

..the code added a wrapper process to ensure that kill'd vfork children
were respawned, however, the non-OOM-able setting on the vfork processes
were causing the OOM killer to reap everything except the vfork

I've fixed this with upstream fix:

This now makes vfork processes OOM-able by default.

** Package changed: linux (Ubuntu) => stress-ng (Ubuntu)

** Changed in: stress-ng (Ubuntu)
       Status: In Progress => Fix Committed

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  "vforkmany" test in the smoke test test suite will stuck on Xenial

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