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From: John Baldwin <jhb@freebsd.org>
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Date: Mon, 17 Jul 2006 12:56:00 -0400
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Cc: Igor Sysoev <is@rambler-co.ru>
Subject: Re: 2Gb SYSVSHM limitation
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On Wednesday 12 July 2006 04:58, Igor Sysoev wrote:
> Hi,
> 
> the current kernel limit of SysV memory segment is 2G.
> Today it is too small for amd64 machines.
> 
> Year ago Christian S.J. Peron had propsed the patch
> http://people.freebsd.org/~csjp/bigsharedmem.1117028863.diff
> to increase the limit:
> http://freebsd.rambler.ru/bsdmail/freebsd-current_2005/msg05627.html
> 
> Are objections against this patch ?

Well, it breaks the ABI of shminfo. :(  Changing the ABI of structures shared 
with userspace like this requires duplicate syscalls, etc. to not break 
existing binaries (such as existing 6.x amd64 binaries).

-- 
John Baldwin