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    SubjectRe: x86 question: Can a process have > 3GB memory?
    On Tue, May 07, 2002 at 04:08:55PM -0700, Robert Love wrote:
    > On Tue, 2002-05-07 at 16:03, Clifford White wrote:
    >
    > > We are working with a database that requires a large amount of memory
    > > allocated by a single process.
    > > This is on an Intel 32-bit platform.
    > > We'd like to go > 3GB of memory per process.
    > > Is this possible on a 32-bit machine? I have been reading the various
    > > 'highmem' discussions, but that's kernel page tables...
    > > Or is this a glibc issue, and not proper for a kernel-list question?
    > > Any pointers would be appreciated. The Intel ESMA (Extended Server Memory
    > > Arch) page states that it's possible, but.....how?
    >
    > You can go to 3.5GB, anything more and stuff starts getting real tight
    > and not very nice. You can only do 3.5/0.5 on non-PAE, though - PAE
    > requires segments to be aligned on 1GB-boundaries.
    >
    > The attached patch (for which credit goes elsewhere - Ingo or Randy, I
    > think?) implements the full range of 1 to 3.5GB user space partitioning,

    actually I'm the one who wrote the 3.5G config option both in 2.2 and
    recently I forward ported it to 2.4 due the number of requests I was
    getting.

    > selectable at compile-time.
    >
    > Robert Love
    >




    Andrea
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