From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Galbraith Subject: SUSE question wrt RT locking primitives Date: Fri, 13 Apr 2012 07:34:16 +0200 Message-ID: <1334295256.9525.60.camel@marge.simpson.net> References: <1321235083-21756-1-git-send-email-jkacur@redhat.com> <1321235083-21756-2-git-send-email-jkacur@redhat.com> <20111114165148.GB2372@linux.vnet.ibm.com> <1321303871.5011.6.camel@frodo> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: Thomas Gleixner , rt-users To: Steven Rostedt Return-path: Received: from cantor2.suse.de ([195.135.220.15]:47413 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751790Ab2DMFeU (ORCPT ); Fri, 13 Apr 2012 01:34:20 -0400 In-Reply-To: <1321303871.5011.6.camel@frodo> Sender: linux-rt-users-owner@vger.kernel.org List-ID: Greetings, SUSE is looking for a straight up answer, I've been tasked with asking the question: can RT maintainers be convinced to fix the RT tree such that locking primitives do not switch from 'OK' to TABOO' at the flick of a config switch? It is understood that "yes" may have undesirable side-effects :) Background: The migrate_enable/disable() EXPORT_SYMBOL_GPL thing came up yesterday again with yet another customer stuck using yet another proprietary driver for proprietary hardware. The choice for the customer/user is use what exists, knock on proprietary doors, or go look at platforms where the proprietary gizmo they need or want to use just works. So that's where the question comes from. Life would be easier if RT didn't trigger the Dr. Jeckle -> Mr. Hyde thing. You know all about where what happens to which locks, so I'll just snip what I had quoted and needlessly commented on to keep this as short as possible ;-) -Mike