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Re: [Xen-devel] DL385 G2 - PCI-DMA: Random memory would be DMAed

  • To: Zachary Richmond <admin.ihsdoor@xxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
  • Date: Fri, 19 Oct 2007 21:01:54 +0100
  • Delivery-date: Fri, 19 Oct 2007 13:02:50 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcgSiuUwI5+8+n5+EdymXwAX8io7RQ==
  • Thread-topic: [Xen-devel] DL385 G2 - PCI-DMA: Random memory would be DMAed

On 19/10/07 20:56, "Zachary Richmond" <admin.ihsdoor@xxxxxxxxx> wrote:

>> Have you increased the swiotlb size yet?
>>  K.
> No, but my system on has 2GB for now.  I am however trying it now.

Hence you only have a 2MB swiotlb by default. If your block driver cannot
address 2GB (and some controllers can't) then you'll be hitting the swiotlb
hard. Try swiotlb=16.

 -- Keir

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