[LTP] [PATCH 3/4] syscalls/mlock201: Add new testcase

[Jan Stancek <jstancek@redhat.com>]

----- Original Message -----
> 
> ----- Original Message -----
> > Check the basic functionality of mlock2(2) since kernel v2.6.9.

Missed this one:
  mlock2() is available since Linux 4.4.

> > 
> > Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
> 
> > + * Description:
> > + * Check the basic functionality of the mlock2(2) since kernel v2.6.9:
> > + * 1) Use mlock2(2) without MLOCK_ONFAULT to lock memory in the specified
> > + *    range that is multiples of page size or not, and the VmLck from
> > + *    /proc/PID/status shows correct size of memory that is locked by PID.
> > + * 2) Use mlock2(2) with MLOCK_ONFAULT to lock memory in the specified
> > + *    range that is multiples of page size or not, and the VmLck from
> > + *    /proc/PID/status show correct size of memory that is locked by PID.
> 
> Can we also check if MLOCK_ONFAULT doesn't make non-present pages present,
> but it still locks present pages? (mincore(2) or /proc/pid/pagemap)
> 
> Regards,
> Jan
> 
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