On Tue, Mar 1, 2016 at 11:56 AM, Linus Torvalds <torva...@linux-foundation.org> wrote: > > (The above patches are entirely untested, maybe I misread the reason > it might be hanging and it's something else going on).
Ok, I did some half-arsed testing. I didn't have a kernel with USERFAULT enabled, but I did compile one with both patches in place and I don't see a hang with the test program. Of course, since I didn't test with an unpatched kernel that would show the hang in the first place, it's entirely possible that my "no hang" result is due to something else. And I didn't bother to test the two patches independently either. But at least on the face of it, those patches fix the problem. Dmitry? Linus