Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S937893AbZDJMWw (ORCPT ); Fri, 10 Apr 2009 08:22:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S935698AbZDJMTh (ORCPT ); Fri, 10 Apr 2009 08:19:37 -0400 Received: from mx2.redhat.com ([66.187.237.31]:38324 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935607AbZDJMTg (ORCPT ); Fri, 10 Apr 2009 08:19:36 -0400 Date: Fri, 10 Apr 2009 14:15:25 +0200 From: Oleg Nesterov To: Kumar Gala Cc: Sukadev Bhattiprolu , linux-kernel Mailing List , Andrew Morton Subject: Re: LTP 20080131 causes defunct processes w/2.6.30-rc1 (possible ptrace issue?) Message-ID: <20090410121525.GA4760@redhat.com> References: <0CA2FBE3-C50C-4503-9134-6DA1C6965743@kernel.crashing.org> <0D4C1952-792C-4AFF-8969-1EF5386FDAB9@kernel.crashing.org> <20090409194912.GA30645@us.ibm.com> <0D6A6388-C12F-4066-84B8-155381D14504@kernel.crashing.org> <20090409213910.GB30645@us.ibm.com> <20090410010319.GA2354@us.ibm.com> <910A25D6-E6E6-4742-B9F4-52532D92117D@kernel.crashing.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <910A25D6-E6E6-4742-B9F4-52532D92117D@kernel.crashing.org> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 699 Lines: 19 On 04/10, Kumar Gala wrote: > > That seems to clear it up.. But why has the behavior changed? I didn't > have to do the "kill -CONT 1" on 2.6.29. I didn't look at the test-case yet, so I don't know what happens. But, before this comment, /sbin/init always ignored SIGSTOP. Now it is possible to stop init. Of course, user-space can't send SIGSTOP to init directly. But if you are ptracer, or send SIGSTOP to the sub-namespace, it should work. Oleg. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/