Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754985Ab3CHHdh (ORCPT ); Fri, 8 Mar 2013 02:33:37 -0500 Received: from mx1.redhat.com ([209.132.183.28]:54898 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754593Ab3CHHdf (ORCPT ); Fri, 8 Mar 2013 02:33:35 -0500 Message-ID: <51399442.1080609@redhat.com> Date: Fri, 08 Mar 2013 15:33:22 +0800 From: WANG Chao User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130221 Thunderbird/17.0.3 MIME-Version: 1.0 To: Yinghai Lu CC: CAI Qian , LKML , kexec , Dave Young , Vivek Goyal , "H. Peter Anvin" Subject: Re: 3.9-rc1: crash kernel panic - not syncing: Can not allocate SWIOTLB buffer earlier and can't now provide you with the DMA bounce buffer References: <51397D1D.5030602@redhat.com> <1750036321.11235774.1362722613994.JavaMail.root@redhat.com> <51399154.5030500@redhat.com> In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2143 Lines: 55 On 03/08/2013 03:27 PM, Yinghai Lu wrote: > On Thu, Mar 7, 2013 at 11:20 PM, WANG Chao wrote: >>> >>> looks like your system DO have DMAR table, please enable dmar >>> remapping in your kernel config. >> >> I've already got following config: >> CONFIG_DMAR_TABLE=y >> CONFIG_INTEL_IOMMU=y >> CONFIG_IRQ_REMAP=y >> >> but I don't have intel_iommu=on in kernel cmdline. IIRC, iommu will prevent >> 2nd kernel from booting ... > > Did you put intel_iommu=on on first and second cpu both? I tried, 2nd kernel didn't boot and keep splitting errors like these: [ 2.106939] DMAR: No ATSR found [ 2.110121] IOMMU 0 0xfed90000: using Queued invalidation [ 2.115522] IOMMU 1 0xfed91000: using Queued invalidation [ 2.120919] IOMMU: Setting RMRR: [ 2.124162] IOMMU: Setting identity map for device 0000:00:02.0 [0xab800000 - 0xaf9fffff] [ 2.133099] IOMMU: Setting identity map for device 0000:00:1d.0 [0xaac95000 - 0xaacb2fff] [ 2.141305] IOMMU: Setting identity map for device 0000:00:1a.0 [0xaac95000 - 0xaacb2fff] [ 2.149503] IOMMU: Setting identity map for device 0000:00:14.0 [0xaac95000 - 0xaacb2fff] [ 2.157690] IOMMU: Prepare 0-16MiB unity mapping for LPC [ 2.163011] IOMMU: Setting identity map for device 0000:00:1f.0 [0x0 - 0xffffff [Errors, here we go] [ 2.170932] dmar: DRHD: handling fault status reg 3 [ 2.170933] PCI-DMA: Intel(R) Virtualization Technology for Directed I/O [ 2.182486] dmar: DMAR:[DMA Write] Request device [00:02.0] fault addr ffffe000 [ 2.182486] DMAR:[fault reason 05] PTE Write access is not set [ 2.195705] dmar: DRHD: handling fault status reg 3 [ 2.200570] dmar: DMAR:[DMA Read] Request device [00:02.0] fault addr ff873000 [ 2.200570] DMAR:[fault reason 06] PTE Read access is not set [ 2.213618] dmar: DRHD: handling fault status reg 3 [..] Thanks, WANG Chao > > Thanks > > Yinghai > -- 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/