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From: WANG Chao <chaowang@redhat.com>
To: Yinghai Lu <yinghai@kernel.org>
Cc: CAI Qian <caiqian@redhat.com>, kexec <kexec@lists.infradead.org>,
	LKML <linux-kernel@vger.kernel.org>,
	"H. Peter Anvin" <hpa@linux.intel.com>,
	Dave Young <dyoung@redhat.com>, Vivek Goyal <vgoyal@redhat.com>
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
Date: Fri, 08 Mar 2013 15:33:22 +0800	[thread overview]
Message-ID: <51399442.1080609@redhat.com> (raw)
In-Reply-To: <CAE9FiQVPaG5P7mG9HoFzCkaxF62hkU5hEtq_FhdT7n+38aNs9A@mail.gmail.com>

On 03/08/2013 03:27 PM, Yinghai Lu wrote:
> On Thu, Mar 7, 2013 at 11:20 PM, WANG Chao <chaowang@redhat.com> 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
> 


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  reply	other threads:[~2013-03-08  7:33 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <51397D1D.5030602@redhat.com>
2013-03-08  6:03 ` 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 CAI Qian
2013-03-08  6:32   ` Yinghai Lu
2013-03-08  6:36     ` Yinghai Lu
2013-03-08  7:20       ` WANG Chao
2013-03-08  7:27         ` Yinghai Lu
2013-03-08  7:33           ` WANG Chao [this message]
2013-03-08  7:50             ` Yinghai Lu
     [not found]               ` <5139D5A0.6000600@redhat.com>
2013-03-08 18:24                 ` Yinghai Lu
2013-03-08 19:39                   ` Yinghai Lu
2013-03-11  3:42                     ` WANG Chao
2013-03-11 13:14                     ` Konrad Rzeszutek Wilk
2013-03-08  7:52             ` Takao Indoh

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