Re: [Xen-devel] [PATCH] xen socket buffer allocation fix for non-privileged domain

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 15 Jun 2006, at 12:01, Isaku Yamahata wrote:

> socket buffer need not to be machine-contiguous for non-priveleged 
> domain.
> populate physmap hypercall fails with extent order > 0 for 
> non-privileged
> domain.
> On non-privileged domain of Xen/IA64, this caused some trobles.
I put this in for now but, in general the SIF_PRIVILEGED flag is only 
set for domain0 and not for other driver domains. Your problem is 
probably that the guest gives up memory and then cannot reclaim it when 
the get-contiguous-region request fails, so it then crashes. I'm fixing 
this by adding an atomic memory-exchange hypercall -- when I've added 
that you can fix up your create_contiguous_region and I'll remove this 
change to the skbuff allocation code.
 -- Keir



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