Detect Paging IO in disk filter?

Hi Guys,

In our disk upper filter above disk.sys, we would *not like to capture IO
meant for paging file.

This is accomplished with the help of PnP minor function
DEVICE_USAGE_NOTIFICATION, noting down the File Object and matching the
same with top of the stack location in write path. But this does not work
for mirror disks where the FO seems always NULL irrespective of paging IO,
as new irps sent from volume manager.

Is there any alternative implementation to detect paging IO at disk layer
in general or specific to mirror disks?

Thanks,

Chepuri