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Date: Fri, 04 May 2012 06:27:56 +0200 From: Mike Galbraith <efault@....de> To: Andrew Morton <akpm@...ux-foundation.org> Cc: "Eric W. Biederman" <ebiederm@...ssion.com>, Oleg Nesterov <oleg@...hat.com>, LKML <linux-kernel@...r.kernel.org>, Pavel Emelyanov <xemul@...allels.com>, Cyrill Gorcunov <gorcunov@...nvz.org>, Louis Rilling <louis.rilling@...labs.com> Subject: Re: [PATCH] Re: [RFC PATCH] namespaces: fix leak on fork() failure Namespaces have something in common with cgroups. synchronize_rcu() makes them somewhat less than wonderful for dynamic use. default flags = SIGCHLD -namespace: flag |= CLONE_NEWPID -all: flags |= CLONE_NEWIPC | CLONE_NEWNET | CLONE_NEWUSER marge:/usr/local/tmp/starvation # ./hackbench Running with 10*40 (== 400) tasks. Time: 2.636 marge:/usr/local/tmp/starvation # ./hackbench -namespace Running with 10*40 (== 400) tasks. Time: 11.624 marge:/usr/local/tmp/starvation # ./hackbench -namespace -all Running with 10*40 (== 400) tasks. Time: 51.474 You can create trash quickly, but you have to haul it away. -Mike -- 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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