[dbaupp]

One can only fit 2^18 == 262144 stacks with size 1GiB into the 48-bit x86-64 address space (i.e. 48 bits is the total virtual address size).

[zokier]

Isn't 1GiB stack quite huge? I would have excepted them to be like order of magnitude smaller.

[noselasd]

Yes, it's huge. C programs on linux normally defaults to a 8 or 10 MB stack per thread, and that is considered huge by many.