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From: Rik Bobbaers <Rik.Bobbaers@icts.kuleuven.be>
To: linux-kernel@vger.kernel.org
Subject: Re: how to tell i386 from x86-64 kernel
Date: Fri, 01 Feb 2008 11:47:29 +0100	[thread overview]
Message-ID: <1201862849.6193.22.camel@lois> (raw)

hi there,

since i'm not on the list... how about:

tail /proc/1/smaps and check the address size...
on 32 bit: ffffe000-fffff000 r-xp 00000000 00:00 0          [vdso]

on 64 bit: ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0
[vdso]

there you can clearly see that your address space is double... so
there's your 32 bit vs 64 bit

as a normal user, you can do the same but with your own processes

greetings,

> Hi!
> 
> Quiz: on a booted system, how do you tell 32bit from 64bit kernel?
> 
> A1: zcat /proc/config.gz | grep CONFIG_64
> ...but config.gz is optional
> 
> A2: cat /proc/meminfo  | grep High
> ...but i386 kernel could have highmem disabled
> 
> What is _your_ answer? ;-)>

-- 
harry
aka Rik Bobbaers

K.U.Leuven - LUDIT            -=- Tel: +32 485 52 71 50
Rik.Bobbaers@icts.kuleuven.be -=- http://harry.enzoverder.be

Don't steal - the government hates competition.



Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm


             reply	other threads:[~2008-02-01 10:47 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-01 10:47 Rik Bobbaers [this message]
2008-02-02 11:06 ` Pavel Machek
     [not found] <960D0E79B4E503448AD14B5E40A5C1C7BB54CE@USX1.corp.bb>
2008-02-01  1:37 ` Jan Engelhardt
  -- strict thread matches above, loose matches on Subject: below --
2008-02-01  0:42 Pavel Machek
2008-02-01  0:46 ` Ray Lee
2008-02-01  0:59   ` Jan Engelhardt
2008-02-01 11:53     ` Alejandro Riveira Fernández
2008-02-09 20:13       ` Jan Engelhardt
2008-02-09 22:34         ` Arjan van de Ven
2008-02-10  1:27           ` Pavel Machek
2008-02-01  1:03   ` Pavel Machek
2008-02-01  4:51 ` H. Peter Anvin
2008-02-01 10:07   ` Jiri Kosina

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