Re: how to tell i386 from x86-64 kernel

[Pavel Machek]

On Sat 2008-02-09 14:34:30, Arjan van de Ven wrote:
> On Sat, 9 Feb 2008 21:13:43 +0100 (CET)
> Jan Engelhardt <jengelh@xxxxxxxxxxxxxxx> wrote:
> 
> > 
> > On Feb 1 2008 12:53, Alejandro Riveira Fernández wrote:
> > >> 
> > >> # uname -m
> > >> I won't tell you.
> > >> # linux32 uname -m
> > >> i686
> > >
> > > Ubuntu 7.10 64 bit userland 2.6.24
> > >
> > >$ uname -m
> > >x86_64
> > >$ linux32 uname -m
> > >i686
> > 
> > What I am saying is that uname(2) does not reliably tell you whether
> > you have a 64-bit kernel underneath unless you have other sources of 
> > information.
> 
> that's sort of a rabbit-and-the-frog problem. The 32 bit emulator tries to
> look EXACTLY like the 32 bit kernel, and it really should.
> If someone wants a method to detect even that... we would really want
> to know the exact usecase.. because very likely it's the wrong answer
> to some other problem ;-)

dmesg should really really tell you 32 vs. 64 bit, at the first line
where it prints versions... so you easily know what you are dealing
with when someone sends a bugreport.

							Pavel

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