install_special_mapping && vm_pgoff (Was: vvar, gup && coredump)

[Pedro Alves]

Thanks for looking over all this, guys.  Really appreciated.

On 03/16/2015 07:01 PM, Oleg Nesterov wrote:
> is wrong. To verify, I changed show_map_vma() to expose pgoff even if !file,
> but this test-case can show the problem too:

Might be good to add tests like this to selftests/ once all
this is sorted.

Pedro Alves