From mboxrd@z Thu Jan 1 00:00:00 1970 From: Laszlo Ersek Subject: Re: 2.6.38 (FC15) with PCI passthrough fails mysteriously with iommu=soft.. Date: Thu, 02 Jun 2011 09:42:38 +0200 Message-ID: <4DE73EEE.3030503@redhat.com> References: <4DE60EF8.5060902@redhat.com> <4DE61C2A.2000006@redhat.com> <20110601143100.GE4081@dumpdata.com> <4DE677C6.6040701@redhat.com> <20110601181317.GA2455@dumpdata.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20110601181317.GA2455@dumpdata.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Konrad Rzeszutek Wilk Cc: Paolo Bonzini , "xen-devel@lists.xensource.com" List-Id: xen-devel@lists.xenproject.org On 06/01/11 20:13, Konrad Rzeszutek Wilk wrote: > It probably was panicing b/c it couldn't swizzle out 64MB > of DMA32 memory. You can find that out if you do 'earlyprintk=xenboot' and > that should print out the bootlog in your Xen debug console (if you have > configured guest_loglvl=all). That seems to be it. [52124.668662] Kernel panic - not syncing: DMA(-12): Failed to exchange pages allocated for DMA with Xen! We either don't have the permission or you do not have enoughfree memory under 4GB! [52124.668664] [52124.668677] Pid: 0, comm: swapper Not tainted 2.6.38.6-26.rc1.fc15.x86_64 #1 [52124.668681] Call Trace: [52124.668691] [] panic+0x91/0x19c [52124.668698] [] ? xen_restore_fl_direct_end+0x0/0x1 [52124.668704] [] xen_swiotlb_init+0xf9/0x131 [52124.668711] [] ? pci_swiotlb_late_init+0x0/0x29 [52124.668717] [] ? _etext+0x0/0x2 [52124.668724] [] pci_xen_swiotlb_init+0x17/0x29 [52124.668730] [] pci_iommu_alloc+0x57/0x6e [52124.668736] [] mem_init+0x19/0xec [52124.668741] [] start_kernel+0x200/0x3fe [52124.668746] [] x86_64_start_reservations+0xaf/0xb3 [52124.668752] [] xen_start_kernel+0x59c/0x5a3 Thanks! lacos