From: Jesse Pollard <pollard@tomcat.admin.navo.hpc.mil>
To: ashokr2@attbi.com, <linux-kernel@vger.kernel.org>
Subject: Re: Address space limits in IA32 linux
Date: Wed, 15 May 2002 07:57:13 -0500 (CDT) [thread overview]
Message-ID: <200205151257.HAA75582@tomcat.admin.navo.hpc.mil> (raw)
"Ashok Raj" <ashokr2@attbi.com>:
>
> Hello
>
> what is the maximum addressible virtual address in a IA32 Linux system (4G?)
>
> typically since Database requires a larger address space, does linux kernel
> has any config to limit this space for kernel, so that the user process has
> more address to play with?
>
> thanks
> ashok
Of course - use IA64, Sparc, or PPC.
IA32 is by definition limited to 4G. Just because the Kernel may, under
extreem duress, access more by memory management shenanigans access more,
user processes are ALWAYS limited to a 32 bit virtual address. Even this
is more restricted, since shared libraries and other access limits it even
more. Usually you can stretch it to 3G, but not over that.
search the archives - the details are available.
-------------------------------------------------------------------------
Jesse I Pollard, II
Email: pollard@navo.hpc.mil
Any opinions expressed are solely my own.
next reply other threads:[~2002-05-15 12:57 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-05-15 12:57 Jesse Pollard [this message]
2002-05-15 15:11 ` Bill Davidsen
-- strict thread matches above, loose matches on Subject: below --
2002-05-14 18:02 Ashok Raj
2002-05-15 12:43 ` Rik van Riel
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