[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] 2.6.38 (FC15) with PCI passthrough fails mysteriously with iommu=soft..
On Wed, Jun 01, 2011 at 02:13:17PM -0400, Konrad Rzeszutek Wilk wrote: > On Wed, Jun 01, 2011 at 07:32:54PM +0200, Laszlo Ersek wrote: > > On 06/01/11 16:31, Konrad Rzeszutek Wilk wrote: > > >On Wed, Jun 01, 2011 at 01:02:02PM +0200, Laszlo Ersek wrote: > > >>(Perhaps it's best to write a separate mail about this.) > > > > > >Yes. You did use 'iommu=soft' on your bootup line right? > > > > I thought I did; turns out I was wrong. Sorry for the noise. > > > > Now I tried with "iommu=soft swiotlb=force", but this way the guest > > You don't need the swiotlb=force. I wonder what page talks about that? > The Wiki mentions it is only required for older kernels - not the new ones. > > > > immediately disappears; it doesn't even start to produce console > > It probably was panicing b/c it couldn't swizzle out 64MB > of DMA32 memory. You can find that out if you do 'earlyprintk=xenboot' and > that should print out the bootlog in your Xen debug console (if you have > configured guest_loglvl=all). > > You can also do 'swiotlb=1024' to lower the amount. .. which should have > worked, > except that I found it does not work - so try this patch: > > https://lkml.org/lkml/2011/6/1/554 > > Also, you can set this parameter in you guest file to analyze its stack: > > on_crash="preserve" > > using xenctx. > xenctx usage is described here: http://wiki.xen.org/xenwiki/XenCommonProblems#head-61843b32f0243b5ad0e17850f9493bffd80f8c17 -- Pasi _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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