From mboxrd@z Thu Jan 1 00:00:00 1970 From: Baoquan He Subject: Re: [PATCH v8 10/13] iommu/amd: Allocate memory below 4G for dev table if translation pre-enabled Date: Fri, 28 Jul 2017 19:26:59 +0800 Message-ID: <20170728112659.GT24304@x1> References: <1500627551-12930-1-git-send-email-bhe@redhat.com> <1500627551-12930-11-git-send-email-bhe@redhat.com> <20170727155550.GO3610@suse.de> <20170728090619.GM24304@x1> <20170728111439.GB3431@suse.de> <20170728111553.GR24304@x1> <20170728111809.GC3431@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <20170728111809.GC3431-l3A5Bk7waGM@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Joerg Roedel Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: iommu@lists.linux-foundation.org On 07/28/17 at 01:18pm, Joerg Roedel wrote: > On Fri, Jul 28, 2017 at 07:15:53PM +0800, Baoquan He wrote: > > On 07/28/17 at 01:14pm, Joerg Roedel wrote: > > > Yes, exactly, the first device table also needs to be allocated with > > > GFP_DMA32 so that it ends up below 4GB. > > > > Got it, will do. Thanks! > > Oh, and you also need to check in the kdump kernel whether the old > device-table is really below 4GB and abort the copy otherwise. Ah, indeed. Will change it. Thanks.