Shared memory segment > 1gb

Hi,

I'm trying to get a shared memory segment of just under 2 gb. So far, I've been able to get a 893mb shared segment by altering the _SHM_IDX_BITS to 18 in include/asm/shmparam.h using the 2.2.0 kernel. I'm assuming I can set the _SHM_IDX_BITS to 19 without a problem (more overhead though), but since this is my "working" computer, I don't want any surprises. is this possible without breaking something? I glanced at the code but didn't see any obvious "gotchas".

Don't ask why I don't use multiple segments. It's not my decision.

Jason

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