[memory] cache virtual to physical page translation
[memory] cache virtual to physical page translation

For better performance cache the results of virtual to physical page
address translation and reuse them later. This saves system calls later.

Signed-off-by: Nikolay Nikolaev <5fb6ff14f2a3b931c007d120a649a55e86928f6a@virtualopensystems.com>

eugeneia/snabbswitch,justincormack/snabbswitch,Igalia/snabb,heryii/snabb,mixflowtech/logsensor,dpino/snabb,pirate/snabbswitch,lukego/snabb,dpino/snabbswitch,justincormack/snabbswitch,virtualopensystems/snabbswitch,Igalia/snabbswitch,snabbco/snabb,mixflowtech/logsensor,eugeneia/snabb,Igalia/snabbswitch,heryii/snabb,wingo/snabbswitch,javierguerragiraldez/snabbswitch,alexandergall/snabbswitch,javierguerragiraldez/snabbswitch,fhanik/snabbswitch,heryii/snabb,Igalia/snabb,alexandergall/snabbswitch,pavel-odintsov/snabbswitch,Igalia/snabb,kellabyte/snabbswitch,heryii/snabb,Igalia/snabb,snabbnfv-goodies/snabbswitch,eugeneia/snabb,dwdm/snabbswitch,lukego/snabbswitch,kbara/snabb,pirate/snabbswitch,Igalia/snabbswitch,xdel/snabbswitch,pirate/snabbswitch,pavel-odintsov/snabbswitch,hb9cwp/snabbswitch,virtualopensystems/snabbswitch,fhanik/snabbswitch,andywingo/snabbswitch,dpino/snabbswitch,SnabbCo/snabbswitch,wingo/snabbswitch,snabbco/snabb,dpino/snabb,aperezdc/snabbswitch,xdel/snabbswitch,eugeneia/snabb,hb9cwp/snabbswitch,alexandergall/snabbswitch,heryii/snabb,snabbnfv-goodies/snabbswitch,SnabbCo/snabbswitch,wingo/snabb,lukego/snabbswitch,dpino/snabbswitch,dpino/snabb,aperezdc/snabbswitch,wingo/snabbswitch,eugeneia/snabb,Igalia/snabb,kbara/snabb,alexandergall/snabbswitch,dpino/snabbswitch,alexandergall/snabbswitch,alexandergall/snabbswitch,kellabyte/snabbswitch,dpino/snabb,snabbco/snabb,justincormack/snabbswitch,kellabyte/snabbswitch,snabbco/snabb,eugeneia/snabbswitch,kbara/snabb,Igalia/snabb,kbara/snabb,wingo/snabb,snabbco/snabb,wingo/snabbswitch,mixflowtech/logsensor,virtualopensystems/snabbswitch,lukego/snabbswitch,eugeneia/snabb,eugeneia/snabb,dwdm/snabbswitch,plajjan/snabbswitch,dpino/snabb,mixflowtech/logsensor,plajjan/snabbswitch,dpino/snabb,eugeneia/snabb,andywingo/snabbswitch,pavel-odintsov/snabbswitch,kbara/snabb,Igalia/snabbswitch,lukego/snabb,wingo/snabb,snabbnfv-goodies/snabbswitch,Igalia/snabb,lukego/snabbswitch,wingo/snabb,snabbco/snabb,hb9cwp/snabbswitch,dwdm/snabbswitch,SnabbCo/snabbswitch,eugeneia/snabb,plajjan/snabbswitch,javierguerragiraldez/snabbswitch,lukego/snabb,eugeneia/snabbswitch,alexandergall/snabbswitch,aperezdc/snabbswitch,andywingo/snabbswitch,Igalia/snabbswitch,andywingo/snabbswitch,wingo/snabb,aperezdc/snabbswitch,hb9cwp/snabbswitch,alexandergall/snabbswitch,plajjan/snabbswitch,xdel/snabbswitch,SnabbCo/snabbswitch,heryii/snabb,snabbnfv-goodies/snabbswitch,lukego/snabb,wingo/snabb,eugeneia/snabbswitch,mixflowtech/logsensor,dpino/snabb,Igalia/snabb,justincormack/snabbswitch,snabbco/snabb,fhanik/snabbswitch,snabbco/snabb,kbara/snabb