This bug is missing log files that will aid in diagnosing the problem.
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This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1626149
Title:
yakkety 4.8, missing config CONFIG_USERFAULTFD=y
Status in linux package in Ubuntu:
Incomplete
Bug description:
The 4.4 kernel has CONFIG_USERFAULTFD=y set, however for Yakkety 4.8
it appears to be missing. This was picked up when running the stress-
ng userfault stress tests:
stress-ng --userfaultfd 1
stress-ng: info: [16383] defaulting to a 86400 second run per stressor
stress-ng: info: [16383] dispatching hogs: 1 userfaultfd
stress-ng: info: [16383] cache allocate: default cache size: 8192K
stress-ng: error: [16384] stress-ng-userfaultfd: userfaultfd failed, errno =
38 (Function not implemented)
stress-ng: error: [16383] process 16384 (stress-ng-userfaultfd) terminated
with an error, exit status=1
stress-ng: info: [16383] unsuccessful run completed in 0.00s
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