* Re: Max mem space per process under 2.6.13-15.7-smp
[not found] <5LmVi-6om-11@gated-at.bofh.it>
@ 2006-03-01 1:09 ` Robert Hancock
0 siblings, 0 replies; 4+ messages in thread
From: Robert Hancock @ 2006-03-01 1:09 UTC (permalink / raw)
To: linux-kernel
Kai Lampka wrote:
> Sorry to bother,
> but what is the maximum amount of RAM that a *single* (!) process can
> address under a Kernel version 2.6.13-15.7-smp, with
>
> CONFIG_HIGHMEM64G=y
> CONFIG_HIGHMEM=y
> CONFIG_X86_PAE=y
>
> It seems that I can not get over 3 Gig border, but i need to, to solve
> my numerical problems :(.
If you use a kernel with the 4G-4G user-kernel space split patch, you
can get a full 4GB. To get more than that you will need to move to 64-bit.
--
Robert Hancock Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@nospamshaw.ca
Home Page: http://www.roberthancock.com/
^ permalink raw reply [flat|nested] 4+ messages in thread
* Max mem space per process under 2.6.13-15.7-smp
@ 2006-02-28 23:55 Kai Lampka
2006-03-01 0:11 ` Douglas McNaught
2006-03-01 7:25 ` Arjan van de Ven
0 siblings, 2 replies; 4+ messages in thread
From: Kai Lampka @ 2006-02-28 23:55 UTC (permalink / raw)
To: linux-kernel
Sorry to bother,
but what is the maximum amount of RAM that a *single* (!) process can
address under a Kernel version 2.6.13-15.7-smp, with
CONFIG_HIGHMEM64G=y
CONFIG_HIGHMEM=y
CONFIG_X86_PAE=y
It seems that I can not get over 3 Gig border, but i need to, to solve
my numerical problems :(.
Greetings Kai
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Max mem space per process under 2.6.13-15.7-smp
2006-02-28 23:55 Kai Lampka
@ 2006-03-01 0:11 ` Douglas McNaught
2006-03-01 7:25 ` Arjan van de Ven
1 sibling, 0 replies; 4+ messages in thread
From: Douglas McNaught @ 2006-03-01 0:11 UTC (permalink / raw)
To: kilampka; +Cc: linux-kernel
Kai Lampka <kilampka@gmail.com> writes:
> Sorry to bother,
> but what is the maximum amount of RAM that a *single* (!) process can
> address under a Kernel version 2.6.13-15.7-smp, with
>
> CONFIG_HIGHMEM64G=y
> CONFIG_HIGHMEM=y
> CONFIG_X86_PAE=y
>
> It seems that I can not get over 3 Gig border, but i need to, to solve
> my numerical problems :(.
I've heard of a kernel patch that gives you 3.5GB (leaving 0.5 for
the kernel) but you're not going to get any more than that without
buying a 64-bit machine or playing overlay tricks with mmap(). Given
the price and performance of 64-bit hardware, the former option is
probably a lot better.
-Doug
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Max mem space per process under 2.6.13-15.7-smp
2006-02-28 23:55 Kai Lampka
2006-03-01 0:11 ` Douglas McNaught
@ 2006-03-01 7:25 ` Arjan van de Ven
1 sibling, 0 replies; 4+ messages in thread
From: Arjan van de Ven @ 2006-03-01 7:25 UTC (permalink / raw)
To: kilampka; +Cc: linux-kernel
> It seems that I can not get over 3 Gig border, but i need to, to solve
> my numerical problems :(.
get a 64 bit machine...
you can get upto 4Gb if you use a kernel with the 4g/4g patch (which is
mostly old FC2 kernels and RHEL4 kernels at this point, it's a dying
breed)
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2006-03-01 7:26 UTC | newest]
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2006-03-01 1:09 ` Max mem space per process under 2.6.13-15.7-smp Robert Hancock
2006-02-28 23:55 Kai Lampka
2006-03-01 0:11 ` Douglas McNaught
2006-03-01 7:25 ` Arjan van de Ven
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