[PATCH 0/5] UserfaultFD: Extension for non cooperative uffd usage (v2)

[Pavel Emelyanov]

Hi,

This set is to address the issues that appear in userfaultfd usage
scenarios when the task monitoring the uffd and the mm-owner do not 
cooperate to each other on VM changes such as remaps, madvises and 
fork()-s.

This is the re-based set on the recent userfaultfd branch, two major
changes are:

* No need in separate API version, the uffd_msg introduced in the
  current code and UFFD_API ioctl are enough for the needed extentions
* Two events added -- for mremap() and madvise() MADV_DONTNEED

More details about the particular events are in patches 3 trough 4.
Comments and suggestion are warmly welcome :)

The v1 discussion thread is here: https://lkml.org/lkml/2015/3/18/729

Thanks,
Pavel
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