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Groups > linux.debian.user > #244898

Re: i386 or AMD64 - Which is currently running?

From Stefan Monnier <monnier@iro.umontreal.ca>
Newsgroups linux.debian.user
Subject Re: i386 or AMD64 - Which is currently running?
Date 2022-02-01 06:40 +0100
Message-ID <DLU3w-57d-7@gated-at.bofh.it> (permalink)
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> that's not running a 64bit userspace on a 32bit kernel,

Why not?  You have a 64bit system on top, a 32bit kernel at the bottom
and whether execution of those 64bit binaries is performed directly by
the CPU or via binfmt + qemu is just an implementation detail.

There is an important difference, of course: while you can run a "pure
i386" system on top of an amd64 kernel, you'll need some of the 32bit
system installed (e.g. qemu) in order to run the rest of the system.

> linux was not the first to do that, and many systems let you run binaries
> from an older version on a newer version, but I'm not aware of any that
> worked the other way around

It's typically used to run systems from an "incomparable" CPU.
E.g. to run RISC-V code on an PC.  Which one is older and which one is
newer doesn't really matter.


        Stefan

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Thread

i386 or AMD64 - Which is currently running? Richard Owlett <rowlett@cloud85.net> - 2022-01-31 13:40 +0100
  Re: i386 or AMD64 - Which is currently running? Curt <curty@free.fr> - 2022-01-31 13:40 +0100
    Re: i386 or AMD64 - Which is currently running? Richard Owlett <rowlett@cloud85.net> - 2022-01-31 17:00 +0100
      Re: i386 or AMD64 - Which is currently running? Curt <curty@free.fr> - 2022-01-31 17:40 +0100
        Re: i386 or AMD64 - Which is currently running? Greg Wooledge <greg@wooledge.org> - 2022-01-31 17:40 +0100
          Re: i386 or AMD64 - Which is currently running? Brian <ad44@cityscape.co.uk> - 2022-01-31 21:10 +0100
            Re: i386 or AMD64 - Which is currently running? Stefan Monnier <monnier@iro.umontreal.ca> - 2022-01-31 22:40 +0100
              Re: i386 or AMD64 - Which is currently running? Greg Wooledge <greg@wooledge.org> - 2022-01-31 22:50 +0100
                Re: i386 or AMD64 - Which is currently running? Stefan Monnier <monnier@iro.umontreal.ca> - 2022-02-01 03:10 +0100
                Re: i386 or AMD64 - Which is currently running? David Wright <deblis@lionunicorn.co.uk> - 2022-02-01 04:00 +0100
                Re: i386 or AMD64 - Which is currently running? Stefan Monnier <monnier@iro.umontreal.ca> - 2022-02-01 06:30 +0100
                Re: i386 or AMD64 - Which is currently running? Michael Stone <mstone@debian.org> - 2022-02-01 04:20 +0100
                Re: i386 or AMD64 - Which is currently running? Stefan Monnier <monnier@iro.umontreal.ca> - 2022-02-01 06:40 +0100
                Re: i386 or AMD64 - Which is currently running? Michael Stone <mstone@debian.org> - 2022-02-01 14:40 +0100
              Re: i386 or AMD64 - Which is currently running? Richard Owlett <rowlett@cloud85.net> - 2022-02-01 01:40 +0100
              Re: i386 or AMD64 - Which is currently running? <tomas@tuxteam.de> - 2022-02-01 06:50 +0100
              Re: i386 or AMD64 - Which is currently running? Curt <curty@free.fr> - 2022-02-01 13:30 +0100
                Re: i386 or AMD64 - Which is currently running? Stanislav Vlasov <stanislav.v.v@gmail.com> - 2022-02-01 17:20 +0100
                Re: i386 or AMD64 - Which is currently running? Curt <curty@free.fr> - 2022-02-01 18:50 +0100
            CLARIFICATION --- Re: i386 or AMD64 - Which is currently running? Richard Owlett <rowlett@cloud85.net> - 2022-02-01 01:40 +0100
              Re: CLARIFICATION --- Re: i386 or AMD64 - Which is currently running? songbird <songbird@anthive.com> - 2022-02-01 07:20 +0100
                Re: CLARIFICATION --- Re: i386 or AMD64 - Which is currently running? Richard Owlett <rowlett@cloud85.net> - 2022-02-01 13:10 +0100
      Re: i386 or AMD64 - Which is currently running? Stefan Krusche <linux@stefan-krusche.de> - 2022-02-01 11:50 +0100
  Re: i386 or AMD64 - Which is currently running? Greg Wooledge <greg@wooledge.org> - 2022-01-31 14:40 +0100
    Re: i386 or AMD64 - Which is currently running? David Wright <deblis@lionunicorn.co.uk> - 2022-01-31 17:50 +0100
  Re: i386 or AMD64 - Which is currently running? Teemu Likonen <tlikonen@iki.fi> - 2022-01-31 14:40 +0100
    Re: i386 or AMD64 - Which is currently running? Greg Wooledge <greg@wooledge.org> - 2022-01-31 14:40 +0100
  Re: i386 or AMD64 - Which is currently running? Stefan Monnier <monnier@iro.umontreal.ca> - 2022-01-31 14:40 +0100
  Re: i386 or AMD64 - Which is currently running? David Wright <deblis@lionunicorn.co.uk> - 2022-01-31 20:20 +0100

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