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Message-ID: <50AC39A7.2010505@cn.fujitsu.com> Date: Wed, 21 Nov 2012 10:17:11 +0800 From: Gao feng <gaofeng@...fujitsu.com> To: "Eric W. Biederman" <ebiederm@...ssion.com> CC: Linux Containers <containers@...ts.linux-foundation.org>, linux-kernel@...r.kernel.org, Oleg Nesterov <oleg@...sign.ru>, Serge Hallyn <serge@...lyn.com>, Andrew Morton <akpm@...ux-foundation.org> Subject: Re: [PATCH 06/11] pidns: Don't allow new processes in a dead pid namespace. on 2012/11/17 00:35, Eric W. Biederman wrote: > From: "Eric W. Biederman" <ebiederm@...ssion.com> > > Set nr_hashed to -1 just before we schedule the work to cleanup proc. > Test nr_hashed just before we hash a new pid and if nr_hashed is < 0 > fail. > > This guaranteees that processes never enter a pid namespaces after we > have cleaned up the state to support processes in a pid namespace. > > Currently sending SIGKILL to all of the process in a pid namespace as > init exists gives us this guarantee but we need something a little > stronger to support unsharing and joining a pid namespace. > > Acked-by: "Serge E. Hallyn" <serge@...lyn.com> > Signed-off-by: Eric W. Biederman <ebiederm@...ssion.com> > --- Acked-by: Gao feng <gaofeng@...fujitsu.com> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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