On Wed, Jun 10, 2009 at 11:08:14AM +0300, Avi Kivity wrote: > Avi Kivity wrote: >> >> Not really. One thing, migration should transition the shadow >> pagetables from large pages to small ones, maybe that bit is broken. >> >> Maybe we're looking at a largepage spte and interpreting it as a >> normal L2 spte, and interpreting a guest page as the L1 spt. > > I tried to find where we drop the mmu (or at least large sptes for the > slot) when we enable dirty logging, and failed. Maybe > remove_write_access() is sufficient. I believe you have to break down large pages into 4k pages for migration to work reliably. Was tempted to copy&paste the hugetlbfs file ram alloc code into user/main.c to use with user/vm.c (which then can also be used to test TLB flushes on 2M->4k transition which are lacking). Regarding the bogus spte, could not reproduce yesterday with kvm.git, but in the worst case the audit code will catch it. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
