New ro.kernel.watermark_scale_factor property is used to store the
original value read from /proc/sys/vm/watermark_scale_factor before
extra_free_kbytes.sh changes it. The original value is necessary to
use the same reference point in case the script is invoked multiple
times. The property is set by init the first time script is invoked
and should never be changed afterwards.
Bug: 242837506
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Change-Id: I7760484854a41394a2efda9445cff8cb61587514
extra_free_kbytes.sh is used by init to set /sys/vm/watermark_scale_factor
value. Allow init to execute extra_free_kbytes.sh and the script to access
/proc/sys/vm/watermark_scale_factor and /proc/sys/vm/extra_free_kbytes
files.
Bug: 109664768
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Change-Id: I55ec07e12a1cc5322cfdd4a48d0bdc607f45d832
