From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 101941 invoked by alias); 22 Feb 2016 19:31:58 -0000 Mailing-List: contact systemtap-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Post: List-Help: , Sender: systemtap-owner@sourceware.org Received: (qmail 101828 invoked by uid 48); 22 Feb 2016 19:31:53 -0000 From: "dsmith at redhat dot com" To: systemtap@sourceware.org Subject: [Bug runtime/15775] relay host/guest functionality is broken on RHEL6 Date: Mon, 22 Feb 2016 19:31:00 -0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: systemtap X-Bugzilla-Component: runtime X-Bugzilla-Version: unspecified X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: dsmith at redhat dot com X-Bugzilla-Status: REOPENED X-Bugzilla-Resolution: X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: systemtap at sourceware dot org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_status resolution Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://sourceware.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2016-q1/txt/msg00110.txt.bz2 https://sourceware.org/bugzilla/show_bug.cgi?id=3D15775 David Smith changed: What |Removed |Added ---------------------------------------------------------------------------- Status|RESOLVED |REOPENED Resolution|WONTFIX |--- --- Comment #2 from David Smith --- Note that the relay host/guest functionality also doesn't work on RHEL6, RH= EL7 or any current fedora or rawhide kernels. The only place this works is on RHEL5-era kernels. Perhaps we should just deprecate this functionality (and remove its documentation from the manpage)? The least thing we could do here would be to change the sharedbuf.exp test = case to issue KFAILS (and reference this bug report). (One *ugly* solution here would be to bypass the module exporting mechanism here and use kallsyms_lookup_name() to find the function. The problem with = this approach is that wouldn't update the relay host module's reference count, making it possible to remove the relay host module before the relay guest module. We might be able to update the relay host module's reference count ourselves but we don't really know the module's name and there are probably several time-of-check-to-time-of-use (TOCTTOU) problems lurking there.) --=20 You are receiving this mail because: You are the assignee for the bug.