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Message-ID: <20110702165035.GC26232@openwall.com> Date: Sat, 2 Jul 2011 20:50:35 +0400 From: Solar Designer <solar@...nwall.com> To: Vasiliy Kulikov <segoon@...nwall.com> Cc: Ingo Molnar <mingo@...e.hu>, Andrew Morton <akpm@...ux-foundation.org>, kernel-hardening@...ts.openwall.com, Randy Dunlap <rdunlap@...otime.net>, "Eric W. Biederman" <ebiederm@...ssion.com>, "Serge E. Hallyn" <serge.hallyn@...onical.com>, Daniel Lezcano <daniel.lezcano@...e.fr>, Oleg Nesterov <oleg@...hat.com>, Tejun Heo <tj@...nel.org>, linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org, linux-security-module@...r.kernel.org Subject: Re: [RFC] ipc: introduce shm_rmid_forced sysctl 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
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