Re: [Xen-users] Out of SW-IOMMU space for 7222 bytes at device ...: swiotlb or dom0_mem?

[Chris Joelly <chris-m-lists@xxxxxxxxxx>]

On Mon, Aug 04, 2008, Scott Garron wrote:
> Chris Joelly wrote:
>> Erros:
>> Out of SW-IOMMU space for 7222 bytes at device ...
>>
>> i found somwhere on the internet that increasing dom0_mem and swiotlb
>> should do the trick, but thats unfortunately not true for my setup ...
>
>      What version of Xen and the kernel are you running?  This bug was  
> supposedly fixed in April:
>
> http://lists.xensource.com/archives/html/xen-changelog/2008-04/msg00008.html
>
> ... but a similar (or identical) one appears to still have "NEW" status,  
> posted on April 25th.
>
> http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1227
>
>      Regardless of how you set swiotlb, under high I/O load, this bug  
> has the potential to completely eat your storage array (I found out the  
> hard way).
>
>      As far as I know, it only seems to affect the 3Ware cards on 64-bit 
> systems, running a 64-bit kernel.
>
>      3Ware's knowledge base says this about it:
>
> http://www.3ware.com/kb/article.aspx?id=15345

i tried the following and got some success, at least till now no errors
occurred:

get the tarball for xen 3.1.4, compiled and installed it on Ubuntu
server 8.04 64bit and configured Ubuntu's dom0 kernel 2.6.24 to be run via 
3.1.4 hypervisor. 

thanks, Chris


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