Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932188AbbDQUGt (ORCPT ); Fri, 17 Apr 2015 16:06:49 -0400 Received: from userp1040.oracle.com ([156.151.31.81]:50980 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752271AbbDQUGq (ORCPT ); Fri, 17 Apr 2015 16:06:46 -0400 Date: Fri, 17 Apr 2015 16:06:24 -0400 From: Konrad Rzeszutek Wilk To: Dorian Gray Cc: Alexander Duyck , Alan Stern , Suman Tripathi , iommu@lists.linux-foundation.org, USB list , Kernel development list Subject: Re: Error: DMA: Out of SW-IOMMU space [was: External USB drives become unresponsive after few hours.] Message-ID: <20150417200623.GA14442@l.oracle.com> References: <552FCD25.9060807@gmail.com> <20150416184252.GE7388@x230.dumpdata.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) X-Source-IP: aserv0021.oracle.com [141.146.126.233] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 971 Lines: 26 On Fri, Apr 17, 2015 at 05:14:20PM +0200, Dorian Gray wrote: > On 16 April 2015 at 20:42, Konrad Rzeszutek Wilk wrote: > > And easier way is to compile the kernel with CONFIG_DMA_API_DEBUG > > and then load the attached module. > > > > That should tell you who and what else is holding on the buffers. > > Ok, I have compiled 3.19.4 w/ CONFIG_DMA_API_DEBUG=y + the module you sent me. > Now, I'm not sure if I've done it right - I waited until the error > occured and then modprobe'd dump_dma. > I have attached the kernel log, but it tells me not much, if anything... The network driver is quite hungry for DMA. Did it do the same thing in the earlier kernels? Thanks. > > Thanks again. > Jake -- 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/