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Date: Sat, 2 Jul 2011 20:50:35 +0400
From: Solar Designer <solar@openwall.com>
To: Vasiliy Kulikov <segoon@openwall.com>
Cc: Ingo Molnar <mingo@elte.hu>, Andrew Morton <akpm@linux-foundation.org>,
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Subject: Re: [RFC] ipc: introduce shm_rmid_forced sysctl
Message-ID: <20110702165035.GC26232@openwall.com>
References: <20110622152514.GA9521@albatros> <20110629151436.9be479fb.akpm@linux-foundation.org> <20110701112534.GG20990@elte.hu> <20110701113533.GA19945@albatros>
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On Fri, Jul 01, 2011 at 03:35:33PM +0400, Vasiliy Kulikov wrote:
> From -ow readme:
> 
> "Of course, this breaks the way things are defined, so some applications
> might stop working. In particular, expect most commercial databases to
> break. Apache and PostgreSQL are known to work, though. :-)"
> 
> http://www.openwall.com/linux/README.shtml
> 
> But as it was written in days of Linux 2.4.x, the situation could have
> changed.  A desktop system seems to work.

I wrote the above in 2.0.x days (circa 1998) and it was based on FUD
rather than on any real evidence of any breakage.  Apache and PostgreSQL
were a couple of known users of shared memory segments, and these did
not break.  I was not aware of any programs that presumably did break.
Of course, those probably do exist, but I don't recall anyone ever
reporting any to me (as maintainer of -ow patches), although the warning
quoted above might have played a role in such non-reporting.

Alexander