[PATCH] [Xenial|Yakkety/raspi2] [Config] Enable CONFIG_USERFAULTFD

[Paolo Pisati]

BugLink: http://bugs.launchpad.net/bugs/1633516

Enable the userfaultfd() system call that allows to intercept and
handle page faults in userland.

How to test:

stress-ng -v --userfaultfd 1 --metrics-brief --syslog --tz -t 180

if disabled it will print:

stress-ng-userfaultfd: userfaultfd failed, errno = 38 (Function not implemented)

while, if enabled:

stress-ng: debug: [445] starting stressors
stress-ng: debug: [445] 1 stressor spawned
stress-ng: debug: [446] stress-ng-userfaultfd: started [446] (instance 0)
stress-ng: debug: [446] stress-ng-userfaultfd: exited [446] (instance 0)
stress-ng: debug: [445] process [446] terminated
stress-ng: info: [445] successful run completed in 180.03s (3 mins, 0.03 secs)

Tested on RasbperryPI2/3 armhf and arm64 mode.


Paolo Pisati (1):
  UBUNTU: [Config] USERFAULTFD=y

 debian.raspi2/config/config.common.ubuntu | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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2.7.4