From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from charlotte.tuxdriver.com ([70.61.120.58]:42023 "EHLO smtp.tuxdriver.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753506Ab2D3RRs (ORCPT ); Mon, 30 Apr 2012 13:17:48 -0400 Date: Mon, 30 Apr 2012 13:03:37 -0400 From: "John W. Linville" To: Antonio Quartulli Cc: linux-wireless@vger.kernel.org Subject: Re: iwlwifi warn_slowpath with 3.* Message-ID: <20120430170337.GA2560@tuxdriver.com> (sfid-20120430_191751_861148_4B63B7EF) References: <20120422182928.GA2854@ritirata.org> <20120430145803.GE2630@ritirata.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <20120430145803.GE2630@ritirata.org> Sender: linux-wireless-owner@vger.kernel.org List-ID: On Mon, Apr 30, 2012 at 04:58:04PM +0200, Antonio Quartulli wrote: > On Sun, Apr 22, 2012 at 08:29:29PM +0200, Antonio Quartulli wrote: > > Hello, > > > > since linux-3.0 (I don't remember if it was the case even before), I'm getting > > this output in dmesg: > > > > [ 53.662990] ------------[ cut here ]------------ > > [ 53.663016] WARNING: at drivers/iommu/intel-iommu.c:2911 > > intel_unmap_page+0x14b/0x180() > > [ 53.663047] Hardware name: Latitude E5420 > > [ 53.663066] Driver unmaps unmatched page at PFN ffd1a000 > > > I see that I always get the same addr passed to the unmap function: > > [ 23.950535] Driver unmaps unmatched page at PFN ffd1a000 > > is it a coincidence? > I'm running linux-3.3.3 right now. I can try wireless-testing if it would help. Just for the record, we are seeing a similar problem on RHEL 6.3 (which has an iwlwifi driver derived from linux-3.2). https://bugzilla.redhat.com/show_bug.cgi?id=815998 John -- John W. Linville Someday the world will need a hero, and you linville@tuxdriver.com might be all we have. Be ready.