Thomas Petazzoni added the comment:
I can confirm that I'm affected by the same issue. Booting a simple Linux
system on a Qemu ARM platform, the python startup hangs during 25 seconds due
to the call to getrandom(). I am not doing anything with Python, just starting
the Python interpreter:
# strace -t -o strace.log python
random: nonblocking pool is initialized
Python 3.5.0 (default, Dec 23 2015, 15:11:18)
[GCC 5.1.1 20150608] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>
# grep -A 2 getrandom strace.log
14:43:50
getrandom("\245\362a=\305\32Z\263\364\352j\223\0017\302q\361M\336+\2722>[", 24,
0) = 24
14:44:35 ioctl(0, TCGETS, {B38400 opost isig icanon echo ...}) = 0
14:44:35 mmap2(NULL, 262144, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
-1, 0) = 0x76baf000
As you can see, 25 seconds blocked due to the getrandom() system call. Makes
the Python interpreter not really usable anymore. I would understand if Python
would do when I need to generate cryptographically secure random numbers. But
at this point, I am just starting the interpreter, nothing else.
This is a regression from Python 3.4.3.
----------
nosy: +thomas-petazzoni
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Python tracker <[email protected]>
<http://bugs.python.org/issue25420>
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