On Fri, 2013-06-28 at 20:29 +0200, Joerg Roedel wrote: > Hi Alex, > > On Fri, Jun 28, 2013 at 11:49:04AM -0600, Alex Williamson wrote: > > That's interesting, I PXE boot my system from one NIC then use a > > different NIC for the iSCSI root. The PXE boot NIC now screams like > > this, _until_ I attach it to vfio, then it quiets down. > > Can you please send an example line of the reported fault? The addresses > it faults on would be interesting.
[ 99.613489] AMD-Vi: Event logged [IO_PAGE_FAULT device=02:00.0 domain=0x0000 address=0x000000000008f880 flags=0x0050] > > > Any idea? > > > > Not really without some digging. I wonder if it's a new event each time > > or if something is just not clearing a previous event. ISTR that a boot > > used to often, but not always, generate a couple faults between the > > IOMMU being enabled and the NIC driver being loaded. All the faults I > > see are to the same address, so my guess is that it's getting replayed. > > Well, I think it is a problem uncovered by the patch that re-enables the > event-log interrupt after it happened once. We need to find a strategy > to cope with those problems. > > To my mind as a quick-fix comes rate-limiting for the printks. Or we use > the suppress-pf bit in the DTE to suppress all page-faults after the > first one. > > > Joerg > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
