linux-next: build failure in Linus' tree

2011-08-28 Thread Stephen Rothwell
Hi Linus, After merging the fixes tree, today's linux-next build (powerpc ppc64_defconfig) failed like this: arch/powerpc/kernel/built-in.o: In function `.sys_call_table': (.text+0xbd00): undefined reference to `.sys_nfsservctl' arch/powerpc/kernel/built-in.o: In function `.sys_call_table': (.tex

Re: kvm PCI assignment & VFIO ramblings

2011-08-28 Thread Avi Kivity
On 08/28/2011 04:56 PM, Joerg Roedel wrote: On Sun, Aug 28, 2011 at 04:14:00PM +0300, Avi Kivity wrote: > On 08/26/2011 12:24 PM, Roedel, Joerg wrote: >> The biggest problem with this approach is that it has to happen in the >> context of the given process. Linux can't really modify an mm whi

Re: kvm PCI assignment & VFIO ramblings

2011-08-28 Thread Joerg Roedel
On Sun, Aug 28, 2011 at 04:14:00PM +0300, Avi Kivity wrote: > On 08/26/2011 12:24 PM, Roedel, Joerg wrote: >> The biggest problem with this approach is that it has to happen in the >> context of the given process. Linux can't really modify an mm which >> which belong to another context in a safe w

Re: kvm PCI assignment & VFIO ramblings

2011-08-28 Thread Avi Kivity
On 08/26/2011 12:24 PM, Roedel, Joerg wrote: > > As I see it there are two options: (a) make subsequent accesses from > userspace or the guest result in either a SIGBUS that userspace must > either deal with or die, or (b) replace the mapping with a dummy RO > mapping containing 0xff, with an