hi,
we found a way to come by that problem,
we removed the old page mappings by calling do_unmap() and then
calling the do_mmap() function. Since existing VMA is deleted during
do_unmap(). we are forcing the mmap() to create the vma from the same
start address as the deleted vma.
I have written a custom mmap() which will then call remmap_page_ranges().
Im not sure if this is the right thing to do, but it works fine !!
......
vm_start = vma->vm_start;
vm_size = vma->vm_end - vma->vm_start;
do_munmap(current->mm,vm_start,vm_size);
......
do_mmap(file,vm_start,vm_size,prot,MAP_SHARED,0);
......
~john
Attachment:
pgp00459.pgp
Description: PGP signature
