From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail202.messagelabs.com (mail202.messagelabs.com [216.82.254.227]) by kanga.kvack.org (Postfix) with SMTP id 702746B00A2 for ; Thu, 17 Sep 2009 21:55:49 -0400 (EDT) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit From: Roland McGrath Subject: Re: tracehooks changes && 2.6.32 -mm merge plans In-Reply-To: Oleg Nesterov's message of Thursday, 17 September 2009 22:46:56 +0200 <20090917204656.GC29346@redhat.com> References: <20090915161535.db0a6904.akpm@linux-foundation.org> <20090917204656.GC29346@redhat.com> Message-Id: <20090917215635.73CE89A5@magilla.sf.frob.com> Date: Thu, 17 Sep 2009 14:56:35 -0700 (PDT) Sender: owner-linux-mm@kvack.org To: Oleg Nesterov Cc: Andrew Morton , linux-kernel@vger.kernel.org, linux-mm@kvack.org, "Frank Ch. Eigler" , Christoph Hellwig , utrace-devel@redhat.com List-ID: > On 09/15, Andrew Morton wrote: > > > > #signals-tracehook_notify_jctl-change.patch: needs changelog folding too > > signals-tracehook_notify_jctl-change.patch > > signals-tracehook_notify_jctl-change-do_signal_stop-do-not-call-tracehook_notify_jctl-in-task_stopped-state.patch > > #signals-introduce-tracehook_finish_jctl-helper.patch: fold into signals-tracehook_notify_jctl-change.patch > > signals-introduce-tracehook_finish_jctl-helper.patch > > I think these make sense anyway, Agreed. > > utrace-core.patch > > > > utrace. What's happening with this? > > (since Roland didn't reply yet) > > I guess this patch should be updated. We do have a newer version now with various fixes and clean-ups. But the current version does not play nice with ptrace (does not even exclude ptrace any more). Without at least the ptrace exclusion, using both utrace modules and ptrace might lead to a confused kernel or BUG_ON hits. Past feedback tells us that we need some in-tree users of the utrace API to get merged too. Frank was working on such a thing, and the IBM folks may have another such thing, but I don't know the present status of those modules. Oleg is working feverishly on revamping ptrace using utrace. Other past feedback has suggested this is what people want to see to justify utrace going in. That ptrace work is still a bit away from being ready even for -mm submission. We're pretty sure that we will do some more changes in the utrace core to make that work well, so utrace merged first would be sure to get more changes later (probably including some API differences). Thanks, Roland -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org