Good day!
I tried with this flag and if I setup it to 0 all works fine but if I switch it on I have segfault
You can try it with cudasamples.
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffa6fc3700 (LWP 3033)]
0x00007fffef0b5ffa in ?? () from /usr/lib/libnvidia-glcore.so.343.22
(gdb) where
#0 0x00007fffef0b5ffa in ?? () from /usr/lib/libnvidia-glcore.so.343.22
#1 0x00007fffef0731db in ?? () from /usr/lib/libnvidia-glcore.so.343.22
#2 0x00007fff833685f0 in ?? () from /usr/lib/libcuda.so.1
#3 0x00007fff8336d291 in ?? () from /usr/lib/libcuda.so.1
#4 0x00007fff8336d372 in ?? () from /usr/lib/libcuda.so.1
#5 0x00007fff83207c3f in ?? () from /usr/lib/libcuda.so.1
#6 0x00007fff83379665 in ?? () from /usr/lib/libcuda.so.1
#7 0x00007fff942abd63 in ?? () from /usr/local/cuda-6.5/lib64/libcudart.so.6.5
#8 0x00007fff942abf5e in ?? () from /usr/local/cuda-6.5/lib64/libcudart.so.6.5
#9 0x00007fff942ad598 in ?? () from /usr/local/cuda-6.5/lib64/libcudart.so.6.5
#10 0x00007fff942a0cce in ?? () from /usr/local/cuda-6.5/lib64/libcudart.so.6.5
#11 0x00007fff94295c88 in ?? () from /usr/local/cuda-6.5/lib64/libcudart.so.6.5
#12 0x00007fff942becbc in cudaMalloc ()
from /usr/local/cuda-6.5/lib64/libcudart.so.6.5