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[[!meta copyright="Copyright © 2013, 2016, 2017, 2018 Free Software Foundation,
Inc."]]
[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
id="license" text="Permission is granted to copy, distribute and/or modify this
document under the terms of the GNU Free Documentation License, Version 1.2 or
any later version published by the Free Software Foundation; with no Invariant
Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license
is included in the section entitled [[GNU Free Documentation
License|/fdl]]."]]"""]]
[[!tag faq/support]]
[[!meta title="Is there a 64-bit version?"]]
64-bit kernelland is supported with 32-bit userland, which notably
permits to efficiently make use of more than 2 GiB memory and provide 4 GiB
userland addressing space.
A 64-bit GNU/Hurd is also available, progress is tracked on [[open_issues/64-bit_port]]!
As of April 2025, the Debian hurd-amd64 port works just like the hurd-i386, except for
some bugs, namely swapping issues with rumpdisk and dumping core files.
We plan on supporting both a
32-bit and 64-bit Debian GNU/Hurd, only not both at the same time.
However, there is no plan to fix the year 2038 concern on a 32-bit system.
That being said, you can always run a 32-bit version on a 64-bit machine, it
just works, processes are just limited to a couple GiB available memory.
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