4 Dec
2003
4 Dec
'03
10:01 p.m.
Jean Wolter jean.wolter@inf.tu-dresden.de writes:
So I think this [ unmap a page in a certain address space ] is a useful operation.
PS: I forgot a really nasty interaction with grant. If I take the example of the other thread:
A / \ B C
Assuming A doesn't know that B constructed the dependency between A and C (either using map/grant or co-equal mapping) and A unmaps the page only in the address space of B there is still the mapping in the address space of C.
So to make unmap(page, adress space) actually usable you would need a possibility to prohibit the grant operation for a page.
Regards, Jean