[Xen-users] Re: Re: About swiotlb and " ...PCI-DMA: Out ofSW-IOMMU..."error

["Shaun R." <mailinglists@xxxxxxxxxxxxxxxx>]

add dom0_mem=1024000 to the line with the xen.gz on it, that would allocate 
1024MB of ram...  If you only have 512 though total on your system you 
technically shouldnt be hitting this error according to that other post.  I 
dont really understand whats happening but this has to be a bug considering 
it doesnt happen with a vanilla kernel.....

~Shaun


"Frank Abel Cancio Bello" <frankabel@xxxxxxxxxxxxxxxxxx> wrote in message 
news:1196979626.5691.13.camel@xxxxxxxxx
> Add that my system have just 512Mb of ram. How do you exactly force dom0
> use less than 2GB of ram? with the dom0-min-mem var in
> the /etc/xen/xend-config.sxp conf file?
>
> Salute
> Frank Abel
>
> On Thu, 2007-12-06 at 12:24 -0800, Shaun R. wrote:
> > I have the same problem with xen 3.1 and adding swiotlb=128 to my grub 
> > conf
> > just caused xen to crash/panic.  Not only that but this problem killed my
> > dom0 root partition forcing all of the data into /lost+found which is oh 
> > so
> > much fun.  The only solution i've found to stopping this from happening 
> > is
> > to force dom0 to use less than 2GB of ram.  In my case i forced my dom0 
> > to
> > use 1024MB of ram leaving the rest (around 15GB) on vacation.  Not a big
> > deal since before 3.1 i always forced dom0 to use only 1024MB of ram 
> > anyway
> > leaving the rest for the domU's.
> >
> > I'm running 3ware 9560 controllers btw too if it matters.
> >
> > ~Shaun
> >
> >
> >
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>
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>
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