PGO_PASTEOF
if (flags & PGO_PASTEOF) {
0, PAGERFLAGS | PGO_PASTEOF);
pagerflags |= PGO_PASTEOF;
VM_PROT_WRITE, 0, PGO_SYNCIO | PGO_PASTEOF | PGO_NOBLOCKALLOC |
VM_PROT_WRITE, 0, PGO_SYNCIO | PGO_PASTEOF | PGO_NOBLOCKALLOC |
flags |= PGO_PASTEOF;
PGO_SYNCIO|PGO_OVERWRITE|PGO_PASTEOF|PGO_NOBLOCKALLOC|
gpflags |= PGO_JOURNALLOCKED | PGO_PASTEOF;