Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758479Ab1EaVc4 (ORCPT ); Tue, 31 May 2011 17:32:56 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:33587 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758252Ab1EaVcz (ORCPT ); Tue, 31 May 2011 17:32:55 -0400 MIME-Version: 1.0 In-Reply-To: <20110531190809.GA20691@redhat.com> References: <201105180240.56754.vda.linux@googlemail.com> <20110518095539.GU20624@htj.dyndns.org> <20110523124314.GA7232@redhat.com> <20110524102834.GC10334@htj.dyndns.org> <20110525182919.GB16575@redhat.com> <20110526091401.GD9715@htj.dyndns.org> <20110526150150.GD12525@redhat.com> <20110527182121.GA3212@mtj.dyndns.org> <20110530192255.GB20616@redhat.com> <20110531190809.GA20691@redhat.com> From: Linus Torvalds Date: Wed, 1 Jun 2011 06:32:31 +0900 Message-ID: Subject: Re: [PATCH 03/10] ptrace: implement PTRACE_SEIZE To: Oleg Nesterov Cc: Denys Vlasenko , indan@nul.nu, Tejun Heo , bdonlan@gmail.com, linux-kernel@vger.kernel.org, jan.kratochvil@redhat.com, akpm@linux-foundation.org Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1303 Lines: 31 On Wed, Jun 1, 2011 at 4:08 AM, Oleg Nesterov wrote: > > On a seriouse note, of course you are right, but what we should do? Have we *ever* gotten a bug-report about these kinds of things from actual users? IOW, it may be an annoying issue from a theoretical standpoint, but afaik it's not an annoying issue from a practical user standpoint. Compare it to the _practically_ annoying issue we had with ^C and bash, where it was fundamentally impossible to know whether the child actually exited due to the ^C or not due to the interfaces. That one caused actual practical issues that people hit, and that were impossible to work around in theory, and hard to work around in practice.. In comparison, I don't think pid-vs-namespace issues for ptrace or some subtle interaction with execve is really all that big of a problem in practice. Keep the eye on the ball: look around what people actually complain about for practical reason that they hit, rather than issues that people say "wouldn't it be nice if.." about. Linus -- 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/