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Date: Sun, 24 Aug 2003 02:48:41 -0700
From: Andrew Morton <akpm@osdl.org>
To: "Zheng, Jeff" <jeff.zheng@intel.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Is it a bug (about share memory)?
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"Zheng, Jeff" <jeff.zheng@intel.com> wrote:
>
> I tried to use share memory to check vm overcommit by check Committed_AS
> in /proc/meminfo. It seems that attach of share momory will add the value
> of Committed_AS but detach of share memory does not reduce the value of
> Committed_AS.

shmdt() will not release resources.  Run `ipcs' after your test app and you
will see the shm segment is still there.

Release it with ipcrm and Committed_AS falls back as expected.