> From: Peter Tufvesson <tuwe@flakey.df.lth.se>
> Date: Wed, 5 Jan 2000 23:17:58 +0100 (CET)
> Subject: Can a process use up more than 910MB?
>
> After reading/searching through this mailing list, I got the feeling a
> process could use up to 3GB of virtual memory per default.
If you only need <=2GB, then you can recompile the kernel with the 2GB
option enabled, which should solve the problem. The 2.2.13 kernel (and
presumably the 2.2.14 kernel, which I haven't tried) support this.
If you need 3GB, you need to switch to a version of the kernel with the
bigmem patch. I'm running 2.2.13ac3 (which you can find on
www.kernel.org), which lets me use 3GB of virtual memory in a single
process.
You could also trying using a >=2.3.28 kernel, which also have the bigmem
patch, but I couldn't get those to boot successfully.
See http://humbolt.geo.uu.nl/Linux-MM/ for info about linux memory
management, though it hasn't been updated in a while.
One note: If you use mmap to get memory instead of malloc you get less
memory. On 2.2.13ac I get 2GB maximum per process for mmap and 3GB
maximum per process for malloc.
Jeff
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Fri Jan 07 2000 - 21:00:05 EST