gist vacuum seaq access

<div>After discussion of gist seaq access in vaccum there are 2 issue:</div><div> </div><div>Heikki says
:</div><div><spanstyle="font-size:15px;line-height:21.504px;white-space:pre-wrap;background-color:#eeeeee;">Vacuum
needsto </span><span
style="font-size:15px;line-height:21.504px;white-space:pre-wrap;background-color:#eeeeee;">memorizethe current NSN when
itbegins</span></div><div>1) how i may getting corect NSN.</div><div> </div><div>Also i must setting F_DELETED flag on
emptypage and to clean parent from link on deleted_pages<span
style="font-size:15px;line-height:21.504px;white-space:pre-wrap;background-color:#eeeeee;"><br/></span></div><div>2)
howi may getting parent of page fast??<span style="font-size:15px;line-height:21.504px;background-color:#eeeeee;"><br
/></span></div><div> </div><div>Thanks.</div><div> </div>