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[Xen-users] Re: Xen Dom0 crash doing some I/O with "Out of SW-IOMMU space"

  • To: xen-users@xxxxxxxxxxxxxxxxxxx
  • From: Markus Schuster <ml@xxxxxxxxxxxxxxxxxxxx>
  • Date: Fri, 19 Nov 2010 12:25:16 +0100
  • Delivery-date: Fri, 19 Nov 2010 03:26:51 -0800
  • Followup-to: gmane.comp.emulators.xen.user
  • List-id: Xen user discussion <xen-users.lists.xensource.com>

Ulrich Hochholdinger wrote:
> My dom0 crashes while doing I/O on the local harddrive.
> [..]
> [ 5822.499666] mpt2sas 0000:03:00.0: DMA: Out of SW-IOMMU space for 65536
> [ bytes. 5822.499743] BUG: unable to handle kernel NULL pointer

Wow, I really hope that "Out of SW-IOMMU space" problem doesn't come back. 
We had problems back in late 2007/ early 2008, just search xen-user and xen-
devel for "Out of SW-IOMMU space".
At that time, the trick was a patch to the dom0 kernel. 


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