Re: 64K User Barrier on Linux

Chris Wedgwood (cwf00f.org)
Thu, 25 Nov 1999 18:58:28 +1300

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> The filesystem. Ext2 uses a 16-bit datum for UID and GID. Other places
> in the system seem to be using 32-bit data. If you change the filesystem
> to something with 32-bit UIDs, you might be OK.

The linux ABI is 16-bit uid/gid centric. Chris Wing
<wingcengin.umich.edu> has patches to support 32-bit uid/git types
and patched glibc to work with this (ie. assuming glibc2 then you can
patch kernel, then patch glibc and most things will work as they did
before).

Check out:

http://www.engin.umich.edu/caen/systems/Linux/code/misc/2.3/19991123b/

for more details.

(btw -- I beleive Chris is from the University of Michigan and hit
the 64k user limit hence he wrote these patches)

-cw

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