From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ian Campbell Subject: Re: "swiotlb buffer is full" problem with tg3 and kernel 3.16.0-4-686-pae on Xen 4.4.1 Date: Thu, 21 May 2015 19:11:36 +0100 Message-ID: <1432231896.5748.122.camel@citrix.com> References: <555DF70A.3020001@websource.ch> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <555DF70A.3020001@websource.ch> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Marco Steinacher Cc: xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org On Thu, 2015-05-21 at 17:17 +0200, Marco Steinacher wrote: > Shall I try to build a 3.16.0-4-686-pae kernel with > "CONFIG_NEED_DMA_MAP_STATE=y"? Yes, this is what I would recommend. Although it's not as simple as turning it on, you actually need to patch the Kconfig as in this mail: http://www.spinics.net/lists/netdev/msg325844.html such that it comes on by itself. > Shall I try to set the 'iommu' and/or 'swiotlb' kernel parameters? To > what values? I don't think so, those were used in that thread to demonstrate that the issue exited even on native -- i.e. not under Xen If you could file your results into the Debian BTW[0], i.e. by running "reportbug " then that would be useful to help get it fixed in a future update. Ian. [0] http://bugs.debian.org