ron_chen_123 at yahoo.com
Sat Aug 25 11:36:48 PDT 2001
64-bit Linux should be OK, correct?
--- Brian <brian at heptane.eng.yale.edu> wrote:
> Hi J.M.,
> I ran into this problem as well - the basic
> problem seems to be that
> linux maps the shared libraries at around the 1GB
> mark, so you need to
> change this location in the kernel source code.
> Here's a post from late July I sent to the list
> dealing with the same
> problem.. there's a little more information in that
> thread, if you look it
> up in the mailing list archives.
> Short answer: Change the source code as below, and
> you'll be ok.
> Here's more detail:
> Hey guys,
> I think I'm answering my own question now - if
> anyone else has had this
> problem, here's what SEEMS to be a quick and dirty
> fix. (Quick and
> dirty being the key words!) Also, good conscience
> tells me to write that
> although it's working for me right now, it's not
> elegant, and who knows
> what problems it may create?
> That said, here goes:
> In the kernel source, in file mmap.c, there is a
> line that reads:
> addr = TASK_UNMAPPED_BASE;
> .. This is what sets the default address of the
> shared libs in the
> memory mapping, and it's at 0x40000000 (1G) by
> default. So change it to,
> for example:
> addr = 0x80000000;
> .. And you should, in theory, have up to ~2GB to
> use for the codes.
> People with a little more knowledge than I have can
> probably shed more
> light on this, and while it's not pretty right now,
> when I have time I may
> try to work on something nicer. Right now, I just
> need these jobs to run.
> For more info on this, check out the
> newsgroup, back around June 7th or so.
> Best wishes,
> - Brian
> Beowulf mailing list, Beowulf at beowulf.org
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