Comment 15 for bug 1450584

I never looked into vivid before. So I didn't know whether the problem also occurred on vivid.

I've run the testcase for several hours now on the older 3.19.0-16, without crash.

But on vivid there's a lot more commits on vdso:
http://kernel.ubuntu.com/git/ubuntu/ubuntu-vivid.git/log/arch/x86/vdso/vclock_gettime.c
vs
http://kernel.ubuntu.com/git/ubuntu/ubuntu-trusty.git/log/arch/x86/vdso/vclock_gettime.c

I'm not sure if that affects reproducibility on vivid.